Reliability and validity of the Sinhala version of the physical activity questionnaire for older children (PAQ-C).

The Sinhala version of the PAQ-C achieved perfect content validity at both item and scale levels.

• Content validity was assessed using the content validity index (CVI)
• CVI at both item and scale levels was 1 (reported as 'one')
• Content validity reflects 'the degree to which the content of an instrument is an adequate reflection of the construct to be measured'
• This indicates full agreement among experts on the relevance and representativeness of all items

The Sinhala version of the PAQ-C demonstrated acceptable test-retest reliability as measured by the intraclass correlation coefficient.

• Test-retest reliability was measured with the intraclass correlation coefficient (ICC)
• The ICC value was 0.83
• The authors describe this as 'acceptable' reliability
• Reliability was assessed in a cross-sectional study design

The study involved 301 schoolchildren aged 8–11 years from Sri Lanka.

• Total sample size was 301 schoolchildren
• 197 participants were male and 104 were female
• Age range was 8–11 years
• The study used a cross-sectional design
• Participants were Sinhala-speaking children in Sri Lanka

A validated Sinhala-language physical activity assessment tool for children had been lacking in Sri Lanka prior to this study.

• The PAQ-C is described as 'widely used and can be considered as one of the best available tools for assessing physical activity in children'
• Non-communicable diseases are rising in Sri Lanka, increasing the significance of physical activity assessment in children
• No previously validated tool for Sinhala-speaking children in Sri Lanka existed
• The study involved cultural adaptation as well as translation of the PAQ-C into Sinhala, including development of a pre-final version