A comparison of predictors and intensity of acute postsurgical pain in patients undergoing total hip and knee arthroplasty

In-Hospital Pain and Opioid Consumption After Primary Total Knee Arthroplasty Compared to Primary Total Hip Arthroplasty: Results from 7330 Patients Treated in a Fast-Track Setting

INTRODUCTION

Differences in in-hospital pain and consumption of opioids after primary total hip arthroplasty (THA) and knee arthroplasty (TKA) have been rarely studied in a setting where the patient course is otherwise similar. The aim of this study was to compare early pain intensity and opioid usage between patients who have undergone THA and TKA to identify potential implications for outpatient surgery.

METHODS

This institutional register study included 4655 patients receiving THA and 2675 patients receiving TKA. Pain at rest and during mobilization were collected once preoperatively, and postoperatively at five time-points, twice on the Day of surgery, once each on day 1 and day 2 after surgery, and at discharge, on a numeric rating scale (NRS) 0-10. Rescue opioids in oral morphine-equivalent doses (MME) were consecutively registered. Postoperative mobilization was registered twice daily.

RESULTS

Overall mean pain were 2.0 (Cl 2.0-2.0) after THA and 2.3 (Cl 2.3-2.4) after TKA at rest, and 3.3 (Cl 3.3-3.3) and 3.7 (Cl 3.7-3.8) during mobilization, respectively. Patients undergoing TKA had a transient increase in pain intensity the day after surgery, whereas patients undergoing THA had improved pain levels. Outpatient criteria for pain (NRS < 5 during mobilization) were feasible for 37% of THA and 35% of TKA. Total median MME was 30.0 (0-573) after THA and 52.5 (0-390) after TKA. Patients undergoing TKA were less mobilized during hospitalization.

CONCLUSION

A comparable number of THA and TKA cases were eligible for same-day discharge based on outpatient discharge criteria for pain. Patients receiving TKA can expect an increase in pain intensity and opioid needs on the day after surgery.

Identifying factors associated with persistent opioid use after total joint arthroplasty: a retrospective review

OBJECTIVE

To identify predictors of persistent opioid use in opioid-naïve individuals undergoing total joint arthroplasty.

DESIGN

Retrospective cohort study.

SETTING

Maine Health System.

SUBJECTS

Opioid-naïve patients who underwent at least one total joint arthroplasty (knee, hip, or shoulder) between 2015 and 2020.

METHODS

Least Absolute Shrinkage and Selection Operator (LASSO) logistic regression was used to create a predictive model for persistent opioid use after surgery from a US Electronic Health Record dataset in the Observational Medical Outcomes Partnership Common Data Model format. 75% of the data was used to build the LASSO model using 10-fold cross-validation and 25% of the data was used to determine the optimal probability threshold for predicting the binary outcome.

RESULTS

Out of 6432 patients, 12.3% (792) were identified as having persistent opioid use across combined total joint arthroplasties defined as at least one opioid prescription between 90 days and 1 year after surgery. Patients with persistent opioid use were more likely to be current smokers (OR 1.65), use antidepressants (OR 1.76), or have a diagnosis of post-traumatic stress disorder (OR 2.07) or a substance-related disorder (OR 1.69). Other factors associated with persistent opioid use included back pain (OR 1.43), dementia (OR 1.65), and body mass index over 40 (OR 2.50). The probability of persistent opioid use was not associated with age, sex, or ethnicity.

CONCLUSIONS

This predictive model for persistent opioid use after total joint arthroplasty shows promise as an evidence-based, validated, and standardized tool for identifying high-risk patients before surgery in order to target strategies and interventions to reduce the reliance on opioids for postoperative pain control.

Presurgical anxiety and acute postsurgical pain predict worse chronic pain profiles after total knee/hip arthroplasty

INTRODUCTION

Total joint arthroplasties generally achieve good outcomes, but chronic pain and disability are a significant burden after these interventions. Acknowledging relevant risk factors can inform preventive strategies. This study aimed to identify chronic pain profiles 6 months after arthroplasty using the ICD-11 (International Classification of Diseases) classification and to find pre and postsurgical predictors of these profiles.

MATERIALS AND METHODS

Patients undergoing total knee/hip arthroplasty (n = 209, female = 54.5%) were assessed before surgery, 48 h and 6 months postsurgery for sociodemographic, pain-related, disability and psychological characteristics. K-means-constrained cluster analysis identified chronic pain profiles based on 6-month pain intensity, pain interference and disability. Chi-square tests or one-way ANOVA explored between-cluster differences. Multinomial regression identified predictors of cluster membership. Separate models analyzed presurgical (model 1), postsurgical (model 2) and a combination of previously significant pre and postsurgical (model 3) variables.

RESULTS

A three-cluster solution was selected, translating increasingly worse chronic pain severity: cluster 1 (C1, n = 129), cluster 2 (C2, n = 60) and cluster 3 (C3, n = 20). There were presurgical differences among clusters in the presence of other painful sites (p = 0.013, ϕc = 0.20), pain interference (p = 0.038, η2 = 0.031), disability (p = 0.020, η2 = 0.037), pain catastrophizing (p = 0.019, η2 = 0.060), anxiety (p < 0.001, η2 = 0.087), depression (p = 0.017; η2 = 0.039), self-efficacy (p = 0.018, η2 = 0.038) and satisfaction with life (p = 0.034, η2 = 0.032), postsurgical pain frequency (p = 0.003, ϕc = 0.243) and intensity (p < 0.001, η2 = 0.101). In model 1, disability predicted C2 (OR = 1.040) and anxiety predicted C3 (OR = 1.154) membership. In model 2, pain intensity predicted C3 (OR = 1.690) membership. In model 3, presurgical anxiety predicted C3 (OR = 1.181) and postsurgical pain intensity predicted C2 (OR = 1.234) and C3 (OR = 1.679) membership.

CONCLUSIONS

Most patients had low chronic pain severity at 6 months, but a relevant percentage exhibited poor outcomes. Membership to different outcome profiles was predicted by presurgical anxiety and acute postsurgical pain. These seem promising targets to prevent pain chronification that should be optimized for better surgical outcomes.

Predictors of subacute postoperative pain after total knee arthroplasty: A secondary analysis of two randomized trials

BACKGROUND

Methods for identifying high-pain responders undergoing total knee arthroplasty remain important to improve individualized pain management. This study aimed at evaluating pre- and perioperative predictors of pain on Days 2-7 after total knee arthroplasty.

METHODS

This is a secondary analysis of data from 227 patients participating in two randomized trials. Pain outcomes were mean pain during walking on Days 2-7 and on Days 2, 4 and 7. Multivariable linear and logistic regressions were carried out in two steps. First, only preoperative available variables including demographics, comorbidities, pain catastrophizing scale and preoperative pain were evaluated while controlling for trial intervention and recruitment site. In the second step, perioperative variables and pain during walking 24 h postoperatively were added.

RESULTS

The model with only preoperative predictors for mean pain Days 2-7 showed preoperative pain (R-squared 0.097) as the only predictor. In the second model, adding postoperative available variables, only pain 24 h postoperatively (R-squared 0.248) was significant, with a significant main effect of recruitment site. Results for the separate day analysis similarly showed preoperative pain and pain during walking 24 h postoperatively as predictors. The overall best sensitivity (60%) and specificity (74%) for predicting a high-subacute postoperative pain response on Days 2-7 was with cut-off values of VAS 45.5 (out of 100) for pain during walking 24 h postoperatively.

CONCLUSIONS

Postoperative pain during walking at 24 h is predictive of subacute postoperative pain on Days 2-7 after total knee arthroplasty, while preoperative pain was only a weak predictor.

SIGNIFICANCE STATEMENT

This study investigated factors associated with pain after total knee arthroplasty beyond the immediate postoperative period. The analysis revealed significant associations between preoperative pain levels and, particularly, pain 24 h postoperatively, with subsequent subacute pain the following week. These findings can assist in identifying patients who would benefit from enhanced, individualized analgesic interventions to facilitate postoperative recovery.

Risk factors and predictive model for acute postoperative pain after hip and knee arthroplasty

BACKGROUND

This study aims to identify key factors influencing acute postoperative pain (APP) following hip and knee arthroplasty, and to develop a predictive model to optimize pain management.

METHODS

The study included 492 patients who underwent hip or knee replacement surgery at our institution from July 2021 to July 2024. Preoperative, intraoperative, and postoperative data were collected. Least Absolute Shrinkage and Selection Operator regression and multivariate logistic regression analyses were utilized to identify factors significantly associated with the occurrence of APP.

RESULTS

The findings indicated that factors such as body mass index, diabetes, history of long-term use of analgesics, preoperative Visual Analogue Scale scores, Pain Catastrophizing Scale scores, duration of surgery, and intraoperative blood loss were closely linked to the occurrence of APP. Additionally, the preoperative use of prophylactic analgesics, postoperative use of analgesic pumps, and implementation of nerve blocks significantly reduced the risk of APP.

CONCLUSION

This study identified several factors closely related to APP after hip and knee arthroplasty and provided a basis for postoperative pain management through the developed predictive model. The research underscores the importance of comprehensive preoperative assessment and the implementation of targeted pain prevention measures. Future studies are recommended to expand the sample size and include multiple centers to enhance the generalizability and practicality of these findings.

Differences in the relationship between pain and anxiety in total knee and hip arthroplasty: a longitudinal cross-lagged analysis mediated by depression and pain catastrophizing

Acute postsurgical pain (APSP) is an important risk factor for pain chronification, with reports of being more intense after total knee arthroplasty (TKA) than after total hip arthroplasty (THA). Psychological variables have been associated with differences in postsurgical pain experience. This study aimed to analyse the longitudinal reciprocal association between pain and anxiety levels in patients undergoing TKA or THA, to investigate the moderator role of the type of surgery and to explore psychological mediators in the anxiety - pain association. Patients undergoing TKA (n = 120) or THA (n = 109) were evaluated before surgery and in the acute postsurgical period (48 h postsurgery). Presurgical assessment comprised sociodemographic, pain-related and psychological variables (anxiety, depression, pain catastrophizing, self-efficacy, optimism and satisfaction with life). Postsurgical assessment focused on pain frequency, pain intensity and anxiety. Longitudinal associations were explored using cross-lagged panel models that included the indirect effect paths through possible mediators (pain catastrophizing and depression). Multigroup analyses compared TKA and THA. In the global sample, higher APSP was predicted by higher presurgical pain and worse presurgical anxiety. Multigroup analyses revealed that worse APSP was predicted by higher presurgical anxiety in patients undergoing TKA and by higher presurgical pain in patients undergoing THA. Furthermore, there was a positive significant indirect effect of pain catastrophizing, but not depressive symptoms, in the relationship between presurgical anxiety and APSP in THA. Anxiety and APSP are differently interrelated in TKA and THA. Psychological characteristics could be managed before surgery to favour better APSP control and potentially prevent pain chronification after total joint arthroplasty.

Association of Patient-Reported Anxiety and Pain After Alveolar Bone Grafting

OBJECTIVE

To evaluate the role of psychosocial well-being on perioperative pain and opioid use among patients with cleft lip and palate (CLP) undergoing alveolar bone grafting (ABG).

DESIGN

Retrospective review.

SETTING

Tertiary level craniofacial clinic.

PARTICIPANTS

34 patients with CLP (median age: 11.7 years), including 25 (73.5%) unilateral CLP and 9 (26.5%) bilateral CLP, who underwent ABG from 2015 to 2022.

INTERVENTIONS

ABG using iliac crest bone graft. Patients were prospectively administered four patient-reported psychosocial instruments from the Patient-Reported Outcomes Measurement Information System.

MAIN OUTCOME MEASURES

Perioperative opioid use in morphine equivalent dosage/kilogram, patient-reported pain scores, and length of hospital stay after ABG.

RESULTS

Patient-reported anxiety (r = 0.41, p = 0.02) and depressive symptoms (r = 0.35, p = 0.04) correlated to higher perioperative opioid usage. Multivariable regression models including psychosocial scores, total acetaminophen usage, length of surgery, and other simultaneous surgeries were developed for total opioid usage, patient-reported pain, and length of hospital stay. Patient-reported anxiety was independently predictive of higher perioperative opioid use (β=0.36, p = 0.01) and higher pain scores (β=0.39, p = 0.02), but not length of hospital stay.

CONCLUSIONS

We identified an association for patient-reported anxiety and perioperative opioid use and pain in a CLP cohort undergoing ABG. Future considerations in preoperative patient and family consultation may be indicated in patients self-reporting higher anxiety in an effort to minimize perioperative opioid usage.

Preoperative Education Prior to Hip or Knee Arthroplasty Is Associated With Home Discharge but Not Reduced Length of Stay

Background

Increasing numbers of patients are undergoing total joint arthroplasty as a treatment for osteoarthritis, which can be an anxiety-provoking experience. Setting expectations through a preoperative physical therapy (pre-op PT) session can alleviate some of these stressors, potentially decrease hospital length of stay (LOS), and promote home discharge.

Purpose

We sought to determine whether attending a pre-op PT session is associated with decreased hospital LOS and home discharge in total hip arthroplasty (THA) and total knee arthroplasty (TKA) patients.

Methods

A retrospective cohort study was performed of 20,822 patients who underwent THA or TKA between January 2020 and December 2023. Pre-op PT attendance and covariates, including patient demographics and clinical data, were collected and analyzed for association with LOS and discharge disposition.

Results

Unadjusted univariate analysis revealed that THA and TKA patients who received pre-op PT had a significantly lower average LOS and were more likely to be discharged home. Our multivariate regression model showed that pre-op PT was not significantly associated with LOS in both groups but was significantly associated with home discharge among THA patients.

Conclusions

Our retrospective study of the effect of pre-op PT education on LOS and discharge disposition for elective THA and TKA patients found different results in univariate and multivariate analysis. Further study is needed to confirm the association found on multivariate analysis between pre-op PT and home discharge in THA patients.

Psychological predictors of acute postoperative pain after total knee and hip arthroplasty: A systematic review

BACKGROUND

Identifying patients at high risk of acute postoperative pain after total knee or hip arthroplasty (TKA/THA) will facilitate individualized pain management and research on the efficacy of treatment options. Numerous studies have reported that psychological patient factors may influence acute postoperative pain, but most reviews have focused on chronic pain and functional outcomes. This systematic review aims to evaluate which psychological metrics are associated with acute postoperative pain after TKA and THA.

METHODS

A systematic search was conducted using the databases PubMed, EMBASE, Web of Science, and Cochrane Library until June 2022. Full-text articles reporting associations of preoperative psychological factors with acute pain within 48 h of TKA or THA surgery were identified. Quality was assessed using the Quality in Prognostic Studies tool.

RESULTS

Eighteen studies containing 16 unique study populations were included. TKA was the most common procedure, and anxiety and depression were the most evaluated psychological metrics. Several different anesthetic techniques and analgesic regimens were used. The studies were generally rated as having a low to moderate risk of bias. Catastrophizing was associated with acute pain in six studies (of nine), mainly after TKA. In contrast, three studies (of 13) and two studies (of 13) found anxiety and depression, respectively, to be associated with acute postoperative pain.

CONCLUSION

Pain catastrophizing seemed to be the most consistent psychological predictor of acute postoperative pain after TKA. The results for other psychological factors and THA were inconsistent. However, the interpretation of results was limited by considerable methodological heterogeneity.

Risk factors for pain after total hip arthroplasty: a systematic review

BACKGROUND

Approximately 23% of patients develop hip pain after total hip arthroplasty (THA). In this systematic review, we aimed to identify risk factors associated with postoperative pain after THA to optimize preoperative surgical planning.

METHODS

Six literature databases were searched for articles published from January 1995 to August 2020. Controlled trials and observational studies that reported measurements of postoperative pain with assessments of preoperative modifiable and non-modifiable risk factors were included. Three researchers performed a literature review independently.

RESULTS

Fifty-four studies were included in the study for analysis. The most consistent association between worse pain outcomes and the female sex is poor preoperative pain or function, and more severe medical or psychiatric comorbidities. The correlation was less strong between worse pain outcomes and preoperative high body mass index value, low radiographic grade arthritis, and low socioeconomic status. A weak correlation was found between age and worse pain outcomes.

CONCLUSIONS

Preoperative risk factors that were consistently predictive of greater/server postoperative pain after THA were identified, despite the varying quality of studies that prohibited the arrival of concrete conclusions. Modifiable factors should be optimized preoperatively, whereas non-modifiable factors may be valuable to patient education, shared decision-making, and individualized pain management.

Total knee arthroplasty is associated with greater immediate post-surgical pain and opioid use than total hip arthroplasty

BACKGROUND

As greater emphasis is being placed on opioid reduction strategies and implementation of multimodal analgesia, we sought to determine whether immediate post-surgical opioid consumption was different between THA and TKA.

METHODS

A single-institution total joint arthroplasty database was used to identify patients who underwent elective THA and TKA from 2016 to July 2019. Baseline demographic data, operative time (defined by incision time), and American Society of Anesthesiologist (ASA) class were collected. Morphine milligram equivalents (MME) were calculated and derived from prospectively documented nursing opioid administration events, while visual analog scale (VAS) scores represented pain levels, both of which were collected as part of our institution's standard protocols. Activity Measure for Post-Acute Care (AMPAC) was used to determine physical therapy progress.

RESULTS

A total of 11,693 cases were identified: 5,909 THA (50.53%) and 5784 (49.47%) TKA. THA patients tended to be slightly younger (63.38 years, SD 11.61 years, vs 65.72 years, SD 9.56 years; p < 0.01) and have lower BMIs (28.92 kg/m² vs 32.52 kg/m²; p < 0.01). THA patients had lower ASA scores in comparison to TKA patients (p < 0.01). Aggregate opioid consumption (93.76 MME vs 147.55 MME; p < 0.01) along with first 24-h and 48-h usage was significantly less for THA as compared to TKA. Similarly, mean pain scores (4.15 vs 5.08; p < 0.01) were lower for THA, while AMPAC mobilization scores were higher (20.88 vs 19.29; p < 0.01) when compared to TKA.

CONCLUSION

THA patients reported lower pain scores and were found to require less opioid medication in the immediate post-surgical period than TKA patients.

Systematic review: preoperative psychological factors and total hip arthroplasty outcomes

Background

Total hip arthroplasties (THA) are cost-effective interventions for patients with osteoarthritis refractory to physical therapy or medical management. Most individuals report positive surgical outcomes with reduction in pain and improved joint function. Multiple recent studies demonstrated the influence of patient mental health on surgical success. We sought to determine the relationship between patient preoperative psychological factors and postoperative THA outcomes, specifically pain and function.

Methods

PubMed, EMBASE and Cochrane Reviews databases were queried using terms “(mental OR psychological OR psychiatric) AND (function OR trait OR state OR predictor OR health) AND (outcome OR success OR recovery OR response) AND total joint arthroplasty).” A total of 21 of 1,286 studies fulfilled inclusion criteria and were included in the review. All studies were analyzed using GRADE and Risk of Bias criteria.

Results

Overall, compared to cohorts with a normal psychological status, patients with higher objective measures of preoperative depression and anxiety reported increased postoperative pain, decreased functionality and greater complications following THA. Additionally, participants with lower self-efficacy or somatization were found to have worse functional outcomes.

Conclusions

Preoperative depression, anxiety and somatization may negatively impact patient reported postoperative pain, functionality and complications following THA. Surgeons should consider preoperative psychological status when counseling patients regarding expected surgical outcomes.

Level of evidence

3.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13018-022-03355-3.

Worst pain intensity and opioid intake during the early postoperative period were not associated with moderate-severe pain 12 months after total knee arthroplasty - a longitudinal study

OBJECTIVES

There are several known predictors of pain after total knee arthroplasty (TKA). However, it is unclear whether acute postoperative pain intensity and postoperative opioid intake are associated with pain 12 months after TKA. Thus, the aim of this study was to assess whether worst pain intensity and opioid intake during the early postoperative period are associated with moderate-severe pain 12 months after TKA.

METHODS

A total of 202 patients undergoing primary TKA between October 2012 and September 2014 were prospectively enrolled. Age, sex, contralateral knee pain, BMI, physical status and opioid intake were collected preoperatively. Ketamine and daily opioid intake were collected on postoperative days (POD) 0-3. Using the Brief Pain Inventory, patients' "worst pain intensity" was measured preoperatively, on POD 0-4, and 12 months after TKA. Two logistic regression models evaluated the independent association of early postoperative pain intensity (model 1) and postoperative opioid intake (model 2) with moderate-severe pain 12 months after TKA, adjusting for possible confounders.

RESULTS

In total, 187 patients with data at the 12 month postoperative follow-up were included in this analysis. Pain intensity on POD2 and POD3, as well as preoperative pain and BMI, were significantly associated with pain at 12 months in univariate models. However, in multivariable models adjusted for preoperative pain and BMI, neither pain intensity on POD 0-4 (model 1) nor opioid intake on POD 0-3 (model 2) were associated with pain at 12 months. Preoperative pain was still significant in both models, but BMI remained significant only in model 2.

CONCLUSIONS

Worst pain intensity and opioid intake during the early postoperative period were not associated with moderate-severe pain 12 months after TKA when controlling for potential confounders. More research is needed to confirm these findings.

A Multidisciplinary Transitional Pain Management Program Is Associated With Reduced Opioid Dependence After Primary Total Joint Arthroplasty

BACKGROUND

Overprescription of opioids after total joint arthroplasty (TJA) increases risks of opioid dependence, overdose, and death. The authors hypothesized that a multidisciplinary, perioperative pain management program (the Transitional Pain Service or TPS) for TJA would lead to fewer patients becoming opioid dependent.

METHODS

A TPS was implemented at a Veterans Affairs Medical Center focused on nonopioid pain management, cessation support, and prospective data tracking. A historical control, interventional study design was used to assess opioid use at 90 days post-discharge. Secondary analysis of the implementation group included post-operative outcome scores, time to opioid cessation, and median opioid tablets consumed at 90 days.

RESULTS

Fewer patients in the TPS group demonstrated persistent opioid use at 90 days post-discharge (0.7% vs 9.9%; P = .004). Independent predictors of total opioid tablet prescriptions included TPS (β = -19.41; 95% confidence interval [CI] -35.37 to -3.47), number of tablets prescribed at discharge (β = 1.08; 95% CI 0.86-1.31), and TKA surgery (β = 16.84; 95% CI 4.58-29.10). Under the TPS, median tablets consumed was 20.5 for THA and 36.5 for TKA; median time to cessation was shorter in THA (7 days; 95% CI 2-10) when compared to TKA (13 days; 95% CI 11-16).

CONCLUSION

In opioid-naïve veterans undergoing TJA, the TPS was associated with a 93% reduction in opioid dependence and a 60% reduction in opioid tablet prescriptions at 90 days post-discharge. Under the TPS, median 90-day opioid consumption was 20.5 and 36.5 tablets for THA and TKA, respectively. Widespread adoption of similar programs may greatly reduce opioid use and dependence in orthopedic patients nationally.

LEVEL OF EVIDENCE

III.

Depression in Osteoarthritis: Current Understanding

Depression, one of the most common comorbidities with osteoarthritis (OA), affects patient prognosis and quality of life. It also increases the overall burden of disease. This subgroup of patients has not been effectively managed in clinical settings. The study aimed to direct physicians' attention to the co-occurrence of depression and OA. Therefore, this review summarizes the relevant literature published over the past 10 years. The focus is on the prevalence of and risk factors for depression in OA, the effects of depression on OA development and treatment response, comorbidity mechanisms, screening, and non-pharmacological treatment. The research on the etiology of depression has been driven largely by epidemiological studies. Recent studies have shown that high levels of pain, poor levels of function, high numbers of OA sites, and slow gait might be associated with depression. However, the pathophysiology of OA and depression comorbidities remains unclear. In addition to immune inflammation and structural changes in the brain, which have been documented in brain imaging studies, psychosocial factors may also play a role. The evidence indicates that depression can be treated with early intervention; however, adjustments may need to be made for individuals with comorbid depression in OA. It is recommended that health care providers pay more attention to depressive symptoms in patients with OA. Clinicians should develop and implement an individualized and comprehensive treatment plan for patients based on a mental health assessment and in teams with other professionals to optimize treatment outcomes.

Dispositional and situational personal features and acute post-collision head and neck pain: Double mediation of pain catastrophizing and pain sensitivity

Pain variability can be partially attributed to psycho-cognitive features involved in its processing. However, accumulating research suggests that simple linear correlation between situational and dispositional factors may not be sufficiently explanatory, with some positing a role for mediating influences. In addition, acute pain processing studies generally focus on a post-operative model with less attention provided to post-traumatic injury. As such, this study aimed to investigate a more comprehensive pain processing model that included direct and indirect associations between acute pain intensity in the head and neck, pain catastrophizing (using pain catastrophizing scale (PCS)), and pain sensitivity (using the pain sensitivity questionnaire (PSQ)), among 239 patients with post-motor vehicle collision pain. The effect of personality traits (using Ten Items Personality Inventory (TIPI)) and emotional status (using Hospital Anxiety and Depression Scale (HADS) and Perceived Stress Scale (PSS)) on that model was examined as well. To this end, three Structural Equation Modeling (SEM) analyses were conducted. Overall, the data had good fit to all the models, with only PSQ found to have a direct correlation with acute pain intensity. The SEM analyses conversely revealed several mediations. Specifically, that: first, PSQ fully mediated the relationship between PCS and pain intensity; second, PCS and PSQ together fully mediated the relationship between conscientiousness (personality trait) and pain intensity; and finally, emotional status had direct and indirect links with PSQ and pain intensity. In conclusion, these models suggest that during the acute post-collision phase, pain sensitivity intermediates between emotional states and personality traits, partially via elevated pain catastrophizing thoughts.

Pain and load progression following an early maximal strength training program in total hip- and knee arthroplasty patients

PURPOSE

Total hip arthroplasty (THA) and total knee arthroplasty (TKA) patients significantly increase muscle strength after maximal strength training (MST) initiated soon after surgery. Owing to severe postoperative pain, knee patients are anticipated to be more limited in performing heavy load exercises than hip patients. The aim of the present study was to describe pain and load progression during early MST in THA and TKA patients.

METHODS

Explorative study based on secondary analyses from two randomized controlled trials: 26 THA and 16 TKA patients had their training sessions logged. They trained at 85-90% of their maximal capacity in leg press, and abduction/knee-extension of the operated leg (4 × 5 repetitions) for 8-10 weeks, initiated early postoperatively.

RESULTS

Knee patients experienced significantly more pain than hip patients during the training sessions (p < 0.03), however, pain before and after training was not different (p > 0.09). All patients significantly increased leg press training load until the last intervention week (p < 0.01).

CONCLUSION

This study demonstrates that TKA patients experience more pain than THA patients during training following a MST program but not more than moderate levels during or after training. Pain before and after training is not different. Both groups significantly increased load progression during the intervention. These findings indicate that both THA and TKA patients might perform MST with extensive load progression early after surgery without compromising pain. The studies were registered at ClinicalTrials.gov .

Psychological Characteristics, Female Sex, and Opioid Use Predict Acute Postoperative Pain in Patients Surgically Treated for Thumb Base Osteoarthritis: A Cohort Study

BACKGROUND

It is unclear which factors predict acute postoperative pain in patients surgically treated for thumb base osteoarthritis. The authors investigated the influence of type of surgery, preoperative sociodemographics, preoperative patient-reported outcome measures, psychological characteristics, and postoperative opioid use on acute postoperative pain 24 hours postoperatively following surgery for thumb carpometacarpal osteoarthritis. In addition, preoperative and acute postoperative pain were compared.

METHODS

In this prospective cohort study, 215 patients surgically treated for thumb carpometacarpal osteoarthritis were included. Data were collected in 16 clinics for hand surgery and therapy in The Netherlands. Hierarchical regression was used to identify whether type of surgery, preoperative sociodemographics, preoperative patient-reported outcome measures, psychological characteristics (including treatment credibility and expectations, illness perception, pain catastrophizing, anxiety, and depression), and postoperative opioid use predicted acute postoperative pain 24 hours postoperatively, measured using the Numeric Pain Rating Scale (range, 0 to 10).

RESULTS

Female sex, opioid use, higher preoperative satisfaction with hand, and higher self-reported consequences and coherence predicted greater postoperative pain, with 31 percent explained variance in the final model including psychological factors. Mean postoperative Numeric Pain Rating Scale score was lower (5.1 ± 2.4) than preoperative pain, measured using visual analogue scales (during the past week, 6.7 ± 1.7; physical load, 7.5 ± 1.7) and the Michigan Hand Outcomes Questionnaire (6.4 ± 1.4; p < 0.001).

CONCLUSIONS

Psychological factors, female sex, and opioid use enhance the prediction of acute postoperative pain beyond surgery type, preoperative sociodemographics, and patient-reported outcome measures. Female sex and opioid use were the strongest predictors, even after controlling for psychological factors. Future studies may investigate sex-based approaches and patient education for reducing acute postoperative pain.

CLINICAL QUESTION/LEVEL OF EVIDENCE

Risk, II.

Is a split-dose intravenous dexamethasone regimen superior to a single high dose in reducing pain and improving function after total hip arthroplasty? A randomized blinded placebo-controlled trial

Aims

Intravenous dexamethasone has been shown to reduce immediate postoperative pain after total hip arthroplasty (THA), though the effects are short-lived. We aimed to assess whether two equivalent perioperative split doses were more effective than a single preoperative dose.

Methods

A total of 165 patients were randomly assigned into three groups: two perioperative saline injections (Group A, placebo), a single preoperative dose of 20 mg dexamethasone and a postoperative saline injection (Group B), and two perioperative doses of 10 mg dexamethasone (Group C). Patients, surgeons, and staff collecting outcome data were blinded to allocation. The primary outcome was postoperative pain level reported on a ten-point Numerical Rating Scale (NRS) at rest and during activity. The use of analgesic and antiemetic rescue, incidence of postoperative nausea and vomiting (PONV), CRP and interleukin-6 (IL-6) levels, range of motion (ROM), length of stay (LOS), patient satisfaction, and the incidence of surgical site infection (SSI) and gastrointestinal bleeding (GIB) in the three months postoperatively, were also compared.

Results

The pain scores at rest were significantly lower in Groups B and C than in Group A on postoperative days 1 and 2. The dynamic pain scores and CRP and IL-6 levels were significantly lower for Groups B and C compared to Group A on postoperative days 1, 2, and 3. Patients in Groups B and C had a lower incidence of PONV, reduced use of analgesic and antiemetic rescue, improved ROM, shorter LOS, and reported higher satisfaction than in Group A. Patients in Group C had significantly lower dynamic pain scores and IL-6 and CRP levels on postoperative days 2 and 3, and higher ROM and satisfaction on postoperative day 3 than in Group B. No SSI or GIB occurred in any group.

Conclusion

Perioperative dexamethasone provides short-term advantages in reducing pain, PONV, and inflammation, and increasing range of motion in the early postoperative period after THA. A split-dose regimen was superior to a single high dose in reducing pain and inflammation, and increasing ROM, with better patient satisfaction. Level of evidence: I Cite this article: Bone Joint J 2020;102-B(11):1497–1504.

Investigating the True Effect of Psychological Variables Measured Prior to Arthroplastic Surgery on Postsurgical Outcomes: A P-Curve Analysis

Patients' presurgical psychological profiles have been posited to predict pain and function following arthroplastic surgery of the hip and knee. Nevertheless, findings are conflicting, and this may be rooted in biased reporting that makes the determination of evidential value difficult. This ambiguity may have negative consequences for researchers and governmental agencies, as these rely on findings to accurately reflect reality. P-Curve analyses were used to establish the presence of evidential value and selective reporting in a sample of studies examining the effect of presurgical psychological predictors on outcomes following knee and hip arthroplastic surgery. A systematic search of the literature revealed 26 relevant studies. The examined sets of studies indicate that there is evidential value for the effect of depression on pain intensity and function, anxiety on pain intensity and function, pain catastrophizing on pain intensity, as well as the combined effects of all psychological predictors on pain intensity and function. The presence of evidential value was inconclusive for the effect of optimism on pain intensity. There were no signs that any results were influenced by biased reporting. The results highlight the importance of patients' psychological profiles in predicting surgical outcomes, which represent a promising avenue for future treatment approaches. PERSPECTIVE: The effects of P-hacking are difficult to detect and might be at the root of conflicting findings pertaining to the predictive properties of presurgical psychological variables on postsurgical outcomes. P-Curve analysis allows the determination of evidential value underlying these relationships and detection of P-hacking to ensure that findings are not the result of selective reporting.

Patients With Thumb-base Osteoarthritis Scheduled for Surgery Have More Symptoms, Worse Psychological Profile, and Higher Expectations Than Nonsurgical Counterparts: A Large Cohort Analysis

BACKGROUND

Psychological characteristics, such as depression, anxiety or negative illness perception are highly prevalent in patients with several types of OA. It is unclear whether there are differences in the clinical and psychological characteristics of patients with thumb carpometacarpal (CMC-1) osteoarthritis (OA) scheduled for nonsurgical treatment and those with surgical treatment.

QUESTIONS/PURPOSES

(1) What are the differences in baseline sociodemographic characteristics and clinical characteristics (including pain, hand function, and health-related quality of life) between patients with thumb CMC-1 OA scheduled for surgery and those treated nonoperatively? (2) What are the differences in psychological characteristics between patients scheduled for surgery and those treated nonsurgically, for treatment credibility, expectations, illness perception, pain catastrophizing, and anxiety and depression? (3) What is the relative contribution of baseline sociodemographic, clinical, and psychological characteristics to the probability of being scheduled for surgery?

METHODS

This was a cross-sectional study using observational data. Patients with CMC-1 OA completed outcome measures before undergoing either nonsurgical or surgical treatment. Between September 2017 and June 2018, 1273 patients were screened for eligibility. In total, 584 participants were included: 208 in the surgery group and 376 in the nonsurgery group. Baseline sociodemographic, clinical, and psychological characteristics were compared between groups, and a hierarchical logistic regression analysis was used to investigate the relative contribution of psychological characteristics to being scheduled for surgery, over and above clinical and sociodemographic variables. Baseline measures included pain, hand function, satisfaction with the patient's hand, health-related quality of life, treatment credibility and expectations, illness perception, pain catastrophizing, and anxiety and depression.

RESULTS

Patients in the surgery group had longer symptom duration, more often a second opinion, higher pain, treatment credibility and expectations and worse hand function, satisfaction, HRQoL, illness perception and pain catastrophizing compared with the non-surgery group (effect sizes ranged from 0.20 to 1.20; p values ranged from < 0.001 to 0.044). After adjusting for sociodemographic, clinical, and psychological factors, we found that the following increased the probability of being scheduled for surgery: longer symptom duration (standardized odds ratio [SOR], 1.86; p = 0.004), second-opinion visit (SOR, 3.81; p = 0.027), lower satisfaction with the hand (SOR, 0.65; p = 0.004), higher treatment expectations (SOR, 5.04; p < 0.001), shorter perceived timeline (SOR, 0.70; p = 0.011), worse personal control (SOR, 0.57; p < 0.001) and emotional response (SOR, 1.40; p = 0.040). The hierarchical logistic regression analysis including sociodemographic, clinical, and psychological factors provided the highest area under the curve (sociodemographics alone: 0.663 [95% confidence interval 0.618 to 0.709]; sociodemographics and clinical: 0.750 [95% CI 0.708 to 0.791]; sociodemographics, clinical and psychological: 0.900 [95% CI 0.875 to 0.925]).

CONCLUSIONS

Patients scheduled to undergo surgery for CMC-1 OA have a worse psychological profile than those scheduled for nonsurgical treatment. Our findings suggest that psychological characteristics should be considered during shared decision-making, and they might indicate if psychological interventions, training in coping strategies, and patient education are needed. Future studies should prospectively investigate the influence of psychological characteristics on the outcomes of patients with CMC-1 OA.

LEVEL OF EVIDENCE

Level III, therapeutic study.

Optimism and the Experience of Pain: A Systematic Review

A growing body of literature provides evidence of the health-promoting effects of optimism, including its protective role in acute and chronic pain. Optimists are characterized by positive expectations concerning the future. These positive outcome expectancies lead to more and longer goal-directed efforts and the use of approach coping strategies. No systematic review on the effects of optimism on the experience of pain has so far been conducted. A search in the databases PubMed, Web of Science and PsycInfo, and the scanning of reference lists identified 69 eligible studies. These were categorized according to sample size, participants' age and sex, design, optimism-pain relation as primary vs. secondary study objective, and level of study/publication quality. Overall percentages of positive, zero, and negative associations between optimism and pain as well as relative frequencies of these associations in the different categories were analyzed. About 70% of the studies showed a positive, i.e., beneficial association between optimism and at least one pain outcome. A larger percentage of beneficial associations was found in studies with experimental designs, in studies with the optimism-pain relation as primary objective, in high-quality studies/publications, and in studies including participants with a higher average age. The review suggests that optimism is associated with less acute and chronic pain, especially since a higher percentage of beneficial associations was found with high study/publication quality and with the primary focus on this relationship. For the moderating role of age, different explanations are proposed. Further research on causal relationships and on optimism-fostering clinical interventions is needed.

Identification of Functioning Domains in the Presurgical Period and Their Relationships with Opioid Use and Pain Catastrophizing

OBJECTIVES

The National Institutes of Health Patient-Reported Outcomes Measurement Information System (PROMIS) is a multidimensional screening system evaluating biopsychosocial factors affecting pain and functioning. Using a military sample, the current study 1) examined the structure and domains of the PROMIS, the Defense and Veterans Pain Rating Scale 2.0 (DVPRS), and the Pain Catastrophizing Scale (PCS) within a presurgical setting and 2) examined the relationship of these variables to pre- and postsurgical opioid use.

METHODS

This cross-sectional study included 279 adult patients scheduled for surgery at the Walter Reed National Military Medical Center and a validation sample of 79 additional patients from the Naval Medical Center, San Diego. PROMIS, DVPRS, PCS, and opioid use data were collected before surgery. Exploratory factor analysis and confirmatory factor analysis identified the latent structure for the measures. A structural equation model (SEM) examined their relationship to pre- and postsurgical opioid use.

RESULTS

Two latent factors represented Psychosocial Functioning (PROMIS Depression, PROMIS Anxiety, and PROMIS Social Isolation) and Pain Impact (DVPRS, PROMIS Pain Interference, PROMIS Physical Functioning). The remaining PROMIS scales did not load onto a single factor. In the SEM, the two latent factors and PCS were significantly related to pre- and postsurgical opioid use.

CONCLUSIONS

This study highlights the utility and relative ease of using a convenient multidimensional assessment in presurgical settings. Using such an assessment can help provide targeted interventions for individuals who may be at greatest risk for negative postsurgical outcomes.

Risk-based targeting of adjuvant pregabalin treatment in laparoscopic cholecystectomy: a randomized, controlled trial

Background and aims Pain is the most common reason for delayed discharge after day-case laparoscopic cholecystectomy. This study investigates a simple five-item questionnaire in evaluating the risk of postoperative pain in day-case cholecystectomy and the efficacy and safety of single-dose preoperative pregabalin on patients with multiple risk factors for pain. There are no previous studies on targeting adjuvant pain treatment based on the individual risk factors like the preoperative state of anxiety, acute or chronic pain, and the expectation of pain in day-case surgery. Methods One hundred and thirty patients scheduled for day-case laparoscopic cholecystectomy were evaluated with a five-item questionnaire assessing the risk for postoperative pain. The patients with multiple risk factors (n=60) were randomized to receive either pregabalin 150 mg or placebo, 1 h before surgery. The primary outcome was abdominal pain intensity on numerical rating scale (NRS) 1 h after surgery. Pain, analgesic consumption and adverse effects during first three postoperative days, and the length of hospital stay were also recorded. Results Pregabalin 150 mg given as an adjuvant analgesic preoperatively did not decrease postoperative abdominal pain or opioid consumption in the first hour after surgery compared to placebo in a preselected group of patients with multiple risk factors for postoperative pain (p=0.31). Preoperative anxiety assessed with a scale of 0-10 had a positive association with postoperative pain (p=0.045). Conclusions and implications This was the first trial on systematically selecting patients with a high-risk factor profile for postoperative pain as a target for a preventive adjuvant analgesic intervention. Although numerous previous studies have identified various risk factors, including those used in the current trial, it seems to be challenging to use these risk factors as predictive tools for targeting adjuvant analgesics in day-case surgery. Preoperative anxiety has a positive association with postoperative pain in day-case laparoscopic cholecystectomy, and this should be taken into account when treating these patients.

Illness perception and high readmission health outcomes

This review identified associations between illness perception and health outcomes of patients with a medical diagnosis included in the Hospital Readmissions Reduction Program. Inclusion criteria were English language, use of quantitative methodology, health outcomes specified, and identifiable effect size and statistical significance of the relationship. Most of the 31 studies in this review showed that favorable illness perception has been associated with better health outcomes, while unfavorable illness perception has been associated with worse outcomes. A multifaceted approach might include behavioral, clinical, educational, and psychosocial components to improve one’s illness perception through educative, cognitive-behavioral, or psychodynamic counseling.