Table 1 Key characteristics of participating sites (presented in random order to protect anonymity of sites)
Site | Self-reported BSOTS normalisation | Year BSOTS initiated | Annual Births | Region | Number of participants interviewed per site |
|---|---|---|---|---|---|
A | Completely normalised | 2013 | 6000–8000 | Midlands | 5 |
B | Completely normalised | 2021 | 4500–6000 | North East and Yorkshire | 6 |
C | Completely normalised | 2021 | 4500–6000 | South West | 4 |
D | Partially normalised | 2015 | 6000–8000 | Midlands | 5 |
E | Partially normalised | 2019 | 6000–8000 | London | 8 |
F | Partially normalised | 2022 | 4500–6000 | North West | 2 |
G | Probably not normalised | 2018 | 4500–6000 | Midlands | 4 |
H | Probably not normalised | 2021 | 6000–8000 | London | 5 |
I | Probably not normalised | 2021 | 4500–6000 | Midlands | 4 |