Asthma medication use in infancy: determinants related to prescription of drug therapy

Food Consumption, Nutrient Intake and Status during the First 1000 days of Life in the Netherlands: a Systematic Review

Adequate nutrition is essential for growth and development in early life. Nutritional data serves as a basis for national nutritional guidelines and policies. Currently, there is no insight into the availability of such data during the first 1000 days of life. Therefore, a systematic review was performed, following the PRISMA reporting guideline, to identify studies on food consumption, nutrient intake or status in the Netherlands. Potential gaps were identified, and the quality of the studies is discussed. The databases Embase and Medline were used, as well as databases from national institutes. Articles published in 2008-2018 were screened by two independent reviewers. In total 601 articles were identified, of which 173 were included. For pregnant women, 32 studies were available with nutritional data, for young children 40 studies were identified. No studies were available for breastfeeding women. A large variety of foods and nutrients were assessed, however certain nutrients were lacking (e.g., vitamin K). Overall, the studies had methodological limitations, making the data unsuitable to assess nutrient inadequacies. There is a need for recent, high quality nutritional research to strengthen the understanding of the nutritional needs and deficiencies during early life, and is fundamental for national guidelines and policies.

Antibiotic use during pregnancy and asthma in preschool children: the influence of confounding

BACKGROUND

A recent study suggested that early-life intestinal microbiota may play an important role in the development of childhood asthma, indicating that antibiotics taken during early life or in late pregnancy may be associated with childhood asthma.

OBJECTIVE

This study aims to assess the association between prenatal antibiotic use and asthma in preschool children using data from the prescription database IADB.nl. To assess the influence of potential confounding, we conducted both a case-sibling and a case-control study and compared the results.

METHODS

We conducted a case-sibling study in which 1228 children with asthma were compared to 1228 siblings without asthma, using data from the prescription database IADB.nl. In addition, a case-control study was conducted. Asthma in preschool children was defined as ≥ 3 prescriptions for anti-asthma medication within a year before the fifth birthday. Conditional logistic regression was used to estimate crude and adjusted odds ratios (aORs).

RESULTS

In both the case-sibling and case-control analysis, the use of antibiotics in the third trimester of pregnancy was associated with an increased risk of asthma in preschool children (aOR 1.37; 95% CI 1.02-1.83 and aOR 1.40; 95% CI 1.15-1.47). Time-trend analyses showed that results were not influenced by a time trend in antibiotic exposure. A significant association between exposure to antibiotics in any trimester of pregnancy and the development of asthma in preschool children was observed in the case-control analysis only (aOR 1.46; 95% CI 1.34-1.59).

CONCLUSION

Antibiotic use in the third trimester of pregnancy was associated with a small increased risk of asthma in preschool children. This association was robust to time-invariant confounding or exposure time trends, further supporting the important role for early-life intestinal microbiota in the development of childhood asthma.

Breastfeeding and childhood asthma: systematic review and meta-analysis

Asthma and wheezing disorders are common chronic health problems in childhood. Breastfeeding provides health benefits, but it is not known whether or how breastfeeding decreases the risk of developing asthma. We performed a systematic review and meta-analysis of studies published between 1983 and 2012 on breastfeeding and asthma in children from the general population. We searched the PubMed and Embase databases for cohort, cross-sectional, and case-control studies. We grouped the outcomes into asthma ever, recent asthma, or recent wheezing illness (recent asthma or recent wheeze). Using random-effects meta-analyses, we estimated pooled odds ratios of the association of breastfeeding with the risk for each of these outcomes. We performed meta-regression and stratified meta-analyses. We included 117 of 1,464 titles identified by our search. The pooled odds ratios were 0.78 (95% confidence interval: 0.74, 0.84) for 75 studies analyzing "asthma ever," 0.76 (95% confidence interval: 0.67, 0.86) for 46 studies analyzing "recent asthma," and 0.81 (95% confidence interval: 0.76, 0.87) for 94 studies analyzing recent wheezing illness. After stratification by age, the strong protective association found at ages 0-2 years diminished over time. We found no evidence for differences by study design or study quality or between studies in Western and non-Western countries. A positive association of breastfeeding with reduced asthma/wheezing is supported by the combined evidence of existing studies.

What drives prescribing of asthma medication to preschool wheezing children? A primary care study

There is limited information on which data primary care pediatricians (PCPs) use to decide whether to prescribe or not asthma maintenance treatment, and what drives prescribing a specific therapy. The study aim was to investigate how prescribing anti-asthma maintenance treatment to preschool wheezing children is influenced by patient, family, environmental, and PCP characteristics. We conducted a cross-sectional study at 32 PCPs sites in Campania, Italy. Medical, family, and environmental information of 376 preschool wheezy children, and characteristics of the enrolled PCPs were collected. Main outcome measures of multilevel multivariate logistic regression analyses were the prescribing of maintenance treatment, and the prescription of a combined therapy as opposed to monotherapy. Variables significantly associated with long-term inhaled corticosteroids (ICS) and/or leukotriene modifiers prescription included frequent wheezing (OR = 7.19), emergency department (ED) visits (OR = 2.21), personal allergic diseases (OR = 8.49), day-care/kindergarten attendance (OR = 2.67), a high PCP prescribing volume (OR = 2.74), and a low proportion of 0- to 5-year-old patients with wheezing diagnosis (OR = 1.16). Leukotriene modifiers plus ICS were much more likely prescribed than ICS or leukotriene modifiers alone to older children (OR = 1.06) and to patients experiencing frequent wheezing (OR = 3.00), ED visits (OR = 3.12), or tobacco smoke exposure during the first 2 years of life (OR = 2.04). Finally, PCP's characteristics significantly associated with ICS plus leukotriene modifiers prescription were group practice (OR = 4.16) and a high prescribing volume (OR = 1.45). Our findings suggest that child characteristics alone are not sufficient to explain how PCPs decide to prescribe maintenance treatment and which therapy to assign, but variables associated to PCPs are crucial as well.

Referrals for recurrent respiratory tract infections including otitis media in young children

OBJECTIVE

(a) To establish whether disease-related, child-related, and physician-related factors are independently associated with specialist referral in young children with recurrent RTI, and (b) to evaluate whether general practitioners (GPs) follow current guidelines regarding these referrals.

METHODS

Electronic GP records of children under 24 month of age, born 2002-2008, were reviewed for RTI episodes using ICPC codes. Child-related factors were extracted from the prospective WHISTLER birth-cohort in which a considerable part of children had been enrolled. To evaluate guideline adherence, referral data were compared to national guideline recommendations.

RESULTS

Consultations for 2532 RTI episodes (1041 children) were assessed. Seventy-eight children were referred for recurrent RTI (3.1% of RTI episodes; 7.5% of children). Disease factors were the main determinants of referral: number (OR 1.7 [CI 1.7-1.7]) and severity of previous RTI episodes (OR 2.2 [CI 1.6-2.8]), and duration of RTI episode (OR 1.7 [CI 1.7-1.8]). The non-disease factors daycare attendance (OR 1.3 [CI 1.0-1.7]) and 5-10 years working experience as a GP compared with <5 years (OR 0.37 [CI 0.27-0.50]) were also associated. Fifty-seven percent of referrals for recurrent RTI were made in accordance with national guidelines.

CONCLUSIONS

Referral of children for recurrent RTI was primarily determined by frequency, severity, and duration of RTIs; the influence of non-disease factors was limited. Just over half of referrals were made in accordance with guidelines.

Assessing paediatric asthma occurrence through dispensed prescription data and questionnaires

BACKGROUND

The prevalence of asthma, a common disorder in childhood, is often estimated by cross-sectional studies based on questionnaires, with the drawback that estimates are limited to certain age groups and areas. The use of electronic health data is increasingly allowing researchers to overcome these limitations. This study is aimed at assessing asthma occurrence of a school-aged population in Northeast Italy using two different data sources.

METHODS

In 2004, a population-based survey using a standardized questionnaire was conducted to estimate asthma occurrence among a resident population of children aged 6-7 years and adolescents aged 13 years. A selection of dispensed asthma medications was extracted from electronic databases for a 4-year period prior to questionnaire completion (2000-03). Asthma prevalence was estimated by commonly used questionnaire classifications and compared with use of inhaled bronchodilators (alone or in combination) in various time periods. Correlations between the two approaches were calculated.

RESULTS

A total of 10 252 subjects were eligible for analysis (85% of the resident population). A total of 4747 subjects (38% of the resident population) were registered in the drug database during 2000-03. Asthma prevalence was higher in males and in children. Congruence between the two enquiry methods varied according to criteria applied and improved with the protraction of the observation period.

CONCLUSION

A longer period for the capture of medication data yielded higher congruence. A degree of mismatch was observed between the two methods most likely related to factors of drug use and questionnaire reliability. Nonetheless, the benefits of using easily accessible population data prevail, and further studies are warranted.