A cross‐sectional survey of 5‐year‐old children with non‐syndromic unilateral cleft lip and palate: the Cleft Care <scp>UK</scp> study. Part 1: background and methodology

Response rates and measures were similar to those achieved in the previous survey. There are practical, administrative and methodological challenges in repeating cross-sectional surveys 15 years apart and producing comparable data.