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Table 2 Quality assessment

From: Trends in child and adolescent obesity prevalence according to socioeconomic position: protocol for a systematic review

Component Questions Assessment Ratings
Selection bias Are the individuals selected to participate likely to be representative of the national population? • Very likely Studies that are very likely to be representative and have greater than 80% participation will be rated as strong.
• Somewhat likely
• Not likely
• Cannot tell
What percentage of selected individuals agreed to participate? • 80 to 100%
• 60 to 79%
• Less than 60%
• Can’t tell
Study design Were study methods comparable over time? • Yes Studies with comparable methods over time will be rated as strong.
• No
• Cannot tell
Confounders Were confounders (age, sex, race/ethnicity) controlled for in study design or analysis? • Yes Studies that control for confounding will be rated as strong.
• No
• Cannot tell
Data collection methods Was anthropometry measured (as opposed to self reported)? • Yes Studies where anthropometry was measured will be rated as strong.
• No
• Cannot tell
Analyses Are the statistical analyses appropriate to detect differences by SEP? • Yes Studies that have performed analyses to detect differences by SEP will be rated as strong.
• No
• Cannot tell
SEP, socioeconomic position.