The Chronic Kidney Disease Water Intake Trial: Protocol of a Randomized Controlled Trial

The assessment of public perception towards chronic kidney disease in Jordan: a cross-sectional study

OBJECTIVES

Kidney diseases are considered silent killers due to the lack of well-defined symptoms. Public knowledge about chronic kidney disease (CKD) management has been shown to decrease the risk of CKD onset and progression to end-stage renal disease and renal failure. The main objective of this study was to assess the knowledge of kidney function, CKD symptoms, etiology, prevention and treatment in the general population.

METHODS

A cross-sectional study using a validated questionnaire was conducted in Jordan to assess public knowledge of CKD. Public knowledge of CKD was assessed using a questionnaire consisting of 32 knowledge questions, including risk factors, symptoms, treatment, protective measures and kidney function. The knowledge level was classified according to the total score: poor (0-50%), intermediate (51-70%) and good/high (71-100%). Multiple regression analysis was performed to compare knowledge scores (KS) and predict associations with the participants' baseline characteristics.

RESULTS

The level of knowledge about CKD among the 2181 participants was intermediate. The KS was significantly higher among participants with health issues such as hypertension, diabetes and heart problems, first-degree relatives working in the medical field, majors relevant to health, married, employed, highly educated, high-income and smokers. The main sources of knowledge about CKD were health professionals, TV shows, books and magazines. Multiple regression analysis showed an association between KS and age, sex, functional status, educational level and field, income, smoking status, having a family member/spouse work in the medical field, and knowledge source.

CONCLUSIONS

The public level of knowledge about CKD management is greatly influenced by participants' health and social factors. Thus, improving public knowledge and perception through education and the media will significantly reduce CKD prevalence and incidence.

Chronic kidney disease and its predictors among highly active antiretroviral therapy naïve and experienced HIV-infected individuals at the selected hospitals, Southwest Ethiopia: a comparative cross-sectional study

Objective

This study aimed to determine the prevalence of chronic kidney disease (CKD) and its predictors among highly active antiretroviral therapy (HAART) naïve and experienced HIV-infected individuals.

Method and analysis

Hospital-based comparative cross-sectional study design was used at Mizan-Tepi University Teaching Hospital, Bonga General Hospital and Tepi General Hospital. A total of 616 naïve and experienced HIV-infected individuals participated. A systematic random sampling and consecutive sampling methods were applied to select the HAART experienced and naïve HIV-infected individuals, respectively. Descriptive statistics were used for all study variables. Independent t-test and logistic regression analysis were performed to compare the mean between naïve and experienced patients and to identify its predictor variables considering a <0.05 and 95% CI, respectively.

Results

A total of 616 HIV-positive respondents were enrolled in this study. The prevalence of CKD was 41 (29.3%) of 140 and 78 (16.4%) of 476 HAART-naïve and HAART-experienced HIV patients, respectively. Rural residency, being anaemic, being hypertensive, having had a family history of kidney disease and stage IV current WHO) clinical stage were independent risk factors of CKD among naïve HIV patients, whereas, rural residency, utilisation of drinking water per day below the recommended amount, being anaemic, being hypertensive, stage IV current WHO clinical stage and obesity were predictors of CKD among experienced HIV patients. Statistically significant difference was observed between HAART naïve and HAART experienced participants with regard to the mean glomerular filtration rate level (t=-3.987, 95% CI -18.29 to -6.22).

Conclusion

CKD was higher among HAART-naïve than HAART-experienced study participants. Therefore, early initiation of antiretroviral therapy (ART) drugs, modification of lifestyles to decrease obesity and early detection and treatment of comorbidities such as anaemia and hypertension may have profound effects in reducing CKD and increasing patients' quality of life.

Chronic kidney disease in Indonesia: evidence from a national health survey

OBJECTIVES

Several previous studies have stated that consuming certain foods and beverages might increase the risk of chronic kidney disease (CKD). This study aimed to examine the relationships of food and beverage consumption with other risk factors for CKD.

METHODS

Data sources included the 2018 Basic Health Research (Riskesdas) and the National Socio-Economic Survey (Susenas), which were analyzed using a cross-sectional design. The study samples were households from 34 provinces in Indonesia, and the analysis was performed with provincial aggregates. Data were analyzed using risk factor analysis followed by linear regression to identify relationships with CKD.

RESULTS

The prevalence of CKD in Indonesia was 0.38%. The province with the highest prevalence was North Kalimantan (0.64%), while the lowest was found in West Sulawesi (0.18%). Five major groups were formed from 15 identified risk factors using factor analysis. A linear regression model presented 1 significant selected factor (p=0.006, R2 =31%). The final model of risk factors included water quality, consumption of fatty foods, and a history of diabetes.

CONCLUSIONS

Drinking water quality, fatty food consumption, and diabetes are associated with CKD. There is a need to monitor drinking water, as well as to promote health education and provide comprehensive services for people with diabetes, to prevent CKD.

Kidney function profile before, during, and after Ramadan fasting in healthy elderly: a prospective cohort study

BACKGROUND Kidney function profile is one of the important parameters in determining the health of the elderly. In Indonesia, no study has been conducted on kidney function profile during Ramadan fasting to determine the safety of Ramadan fasting in the elderly. This study aimed to determine the kidney function profile in the elderly who fasted during Ramadan. METHODS This study used a prospective cohort design. The inclusion criteria were elderly aged >60 years undergoing Ramadan fasting in Jatinegara, Jakarta from April to July 2019. Patients with end-stage renal failure who had an acute infection, hypertension crisis, or refused to participate in the study were excluded. Patients who did not fast for 3 consecutive days were dropped out. The kidney function profile was calculated by the estimated glomerular filtration rate (eGFR) using the CKD-EPI formula 1 week before the first day of Ramadan, 3 weeks after the first day of fasting, and 2 weeks after the last day of fasting. Decreased eGFR was defined as having a minimum of 20% eGFR decline during or after the fasting period. Bivariate analysis was performed using McNemar or Cochran tests. RESULTS 2 patients had eGFR decline during fasting, and 7 patients had eGFR decline after fasting. The median eGFR before, during, and after fasting were 81.5, 88.7, and 76.8 ml/min/1.73 m², respectively. A total of 1.4% of subjects had decreased eGFR during Ramadan, while 9.1% had decreased eGFR after Ramadan. However, the changes were not statistically significant. CONCLUSIONS Although most elderly had lower eGFR following Ramadan fasting compared to before and during Ramadan, only individuals with several comorbidities had significant changes of kidney function.

Fluid Intake Recommendation Considering the Physiological Adaptations of Adults Over 65 Years: A Critical Review

The aim of this critical review was to clarify recommended fluid intake for older people. A literature search of published articles and guidelines on fluid intake recommendations until April 2020 was carried out using PUBMED, Scopus, Cochrane, and Google Scholar. In this review, we focused on people over 65 years old at different care levels. The results show that the mean fluid intake ranges between 311 and 2390 mL/day. However, it is difficult to know whether this corresponds to the real pattern of fluid intake, due to the variability of data collection methods. With respect to the recommendations, most international organizations do not take into consideration the physiology of ageing or the health problems associated with an older population. In conclusions, we recommend to follow the guideline of the European Society for Clinical Nutrition and Metabolism (ESPEN) and the European Food Safety Authority (EFSA). ESPEN is the only guideline which takes into account age. It is also based on EFSA recommendations. This authority takes into consideration all fluids consumed (ranging from food to fluids). If it is known that around 20% of all fluids consumed come from food, the result would effectively be that the EFSA recommends the same as the ESPEN guidelines: 1.6 L/day for females and 2.0 L/day for males. The findings could help raise the awareness of professionals in the sector with respect to the required fluid intake of the elderly and, in this way, contribute to avoiding the consequences of dehydration.

Antidiuretic Hormone and Serum Osmolarity Physiology and Related Outcomes: What Is Old, What Is New, and What Is Unknown?

CONTEXT

Although the physiology of sodium, water, and arginine vasopressin (AVP), also known as antidiuretic hormone, has long been known, accumulating data suggest that this system operates as a more complex network than previously thought.

EVIDENCE ACQUISITION

English-language basic science and clinical studies of AVP and osmolarity on the development of kidney and cardiovascular disease and overall outcomes.

EVIDENCE SYNTHESIS

Apart from osmoreceptors and hypovolemia, AVP secretion is modified by novel factors such as tongue acid-sensing taste receptor cells and brain median preoptic nucleus neurons. Moreover, pharyngeal, esophageal, and/or gastric sensors and gut microbiota modulate AVP secretion. Evidence is accumulating that increased osmolarity, AVP, copeptin, and dehydration are all associated with worse outcomes in chronic disease states such as chronic kidney disease (CKD), diabetes, and heart failure. On the basis of these pathophysiological relationships, an AVP receptor 2 blocker is now licensed for CKD related to polycystic kidney disease.

CONCLUSION

From a therapeutic perspective, fluid intake may be associated with increased AVP secretion if it is driven by loss of urine concentration capacity or with suppressed AVP if it is driven by voluntary fluid intake. In the current review, we summarize the literature on the relationship between elevated osmolarity, AVP, copeptin, and dehydration with renal and cardiovascular outcomes and underlying classical and novel pathophysiologic pathways. We also review recent unexpected and contrasting findings regarding AVP physiology in an attempt to explain and understand some of these relationships.

Effect of Coaching to Increase Water Intake on Kidney Function Decline in Adults With Chronic Kidney Disease: The CKD WIT Randomized Clinical Trial

IMPORTANCE

In observational studies, increased water intake is associated with better kidney function.

OBJECTIVE

To determine the effect of coaching to increase water intake on kidney function in adults with chronic kidney disease.

DESIGN, SETTING, AND PARTICIPANTS

The CKD WIT (Chronic Kidney Disease Water Intake Trial) randomized clinical trial was conducted in 9 centers in Ontario, Canada, from 2013 until 2017 (last day of follow-up, May 25, 2017). Patients had stage 3 chronic kidney disease (estimated glomerular filtration rate [eGFR] 30-60 mL/min/1.73 m2 and microalbuminuria or macroalbuminuria) and a 24-hour urine volume of less than 3.0 L.

INTERVENTIONS

Patients in the hydration group (n = 316) were coached to drink more water, and those in the control group (n = 315) were coached to maintain usual intake.

MAIN OUTCOMES AND MEASURES

The primary outcome was change in kidney function (eGFR from baseline to 12 months). Secondary outcomes included 1-year change in plasma copeptin concentration, creatinine clearance, 24-hour urine albumin, and patient-reported overall quality of health (0 [worst possible] to 10 [best possible]).

RESULTS

Of 631 randomized patients (mean age, 65.0 years; men, 63.4%; mean eGFR, 43 mL/min/1.73 m2; median urine albumin, 123 mg/d), 12 died (hydration group [n = 5]; control group [n = 7]). Among 590 survivors with 1-year follow-up measurements (95% of 619), the mean change in 24-hour urine volume was 0.6 L per day higher in the hydration group (95% CI, 0.5 to 0.7; P < .001). The mean change in eGFR was -2.2 mL/min/1.73 m2 in the hydration group and -1.9 mL/min/1.73 m2 in the control group (adjusted between-group difference, -0.3 mL/min/1.73 m2 [95% CI, -1.8 to 1.2; P = .74]). The mean between-group differences (hydration vs control) in secondary outcomes were as follows: plasma copeptin, -2.2 pmol/L (95% CI, -3.9 to -0.5; P = .01); creatinine clearance, 3.6 mL/min/1.73 m2 (95% CI, 0.8 to 6.4; P = .01); urine albumin, 7 mg per day (95% CI, -4 to 51; P = .11); and quality of health, 0.2 points (95% CI, -0.3 to 0.3; P = .22).

CONCLUSIONS AND RELEVANCE

Among adults with chronic kidney disease, coaching to increase water intake compared with coaching to maintain the same water intake did not significantly slow the decline in kidney function after 1 year. However, the study may have been underpowered to detect a clinically important difference.

TRIAL REGISTRATION

clinicaltrials.gov Identifier: NCT01766687.