Table 1: Age ranges for determining plausibility of mandated health visiting contacts coded by practitioners in Community Services Dataset, 2016/17 to 2019/20.

Mandated contact type	Age range when mandated contact should be offered	Plausible age range specified in our analysis
New birth visit	8–14 days	0–6 months
6–8-week review	42–56 days	0–6 months
1–year review	9–15 months	6–23 months
2–$2\frac{1}{2}$-year review	23–30 months	15–40 months