Characteristics of participants who take up screening tests for diabetes and lipid disorders: a systematic review

OBJECTIVES: To perform a systematic review on the characteristics of participants who attended screening programmes with blood glucose tests, lipid profiles or a combination of them, respectively. DESIGN: Systematic review following the Meta-analysis Of Observational Studies in Epidemiology checklist. DATA SOURCES: PubMed and Medline databases for English literature from 1 January 2000 to 1 April 2020. ELIGIBILITY CRITERIA: Original observational studies that reported baseline characteristics of apparently healthy adult participants screening for diabetes and lipid disorders were included in this review. DATA EXTRACTION: We examined their sociodemographic characteristics, including age, gender, body mass index (BMI) and lifestyle habits. The quality of the included articles was evaluated by the Appraisal of Cross-sectional Studies. RESULTS: A total of 33 articles involving 38 studies in 22 countries were included and analysed in this systematic review. Overall, there was a higher participation rate among subjects who were female in all screening modalities (female vs male: 46.6%–63.9% vs 36.1%–53.4% for diabetes screening; 48.8%–58.4% vs 41.6%–51.2% for lipid screening; and 36.4%–76.8% vs 23.2%–63.6% for screening offering both). Compared with the BMI standard from the WHO, participants in lipid screening had lower BMI (male: 23.8 kg/m(2) vs 24.2 kg/m(2), p<0.01; female: 22.3 kg/m(2) vs 23.6 kg/m(2), p<0.01). Furthermore, it is less likely for individuals of lower socioeconomic status to participate in diabetes or lipid screening in developed areas. CONCLUSIONS: We identified that individuals from lower socioeconomic groups were less likely to take up programmes for diabetes and/or lipid screening in developed areas. These populations are also likely to be at higher risk of non-communicable diseases. Future studies should investigate the barriers and facilitators of screening among non-participants, where targeted interventions to enhance their screening uptake are warranted.