8. Odds ratios for never leaving a child alone in the bath (95% credible interval) by social variables.

Social variables	Bath Alone
GENDER
Boys	1.17 (0.51, 3.12)
Girls	1.73 (0.75, 4.97)
Interaction term (ratio of odds ratios)	0.67 (0.29, 1.53)
ETHNIC GROUP
Black and minority ethnic groups	0.89 (0.23, 5.04)
White	1.0 (0.25, 5.46)
Interaction term (ratio of odds ratios)	0.89 (0.33, 2.45)
FAMILY TYPE
Single parent family	0.53 (0.14, 1.93)*
Two parent family	1.13 (0.71, 1.83)
Interaction term (ratio of odds ratios)	0.47 (0.11, 1.82)
HOUSING TENURE
Non‐owner occupied	1.80 (0.76, 4.34)
Owner occupied	1.05 (0.45, 2.86)
Interaction term (ratio of odds ratios)	1.68 (0.68, 4.09)
PARENTAL UNEMPLOYMENT
1 or more parent not in paid employment	N/A
Both parents in paid employment	N/A
Interaction term (ratio of odds ratios)	N/A
AGE
Odds ratio at age 0	0.62 (0.17, 2.14)
Odds ratio at age 4	3.02 (0.66, 18.18)
Interaction term (ratio of odds ratios)	1.50 (0.96, 2.43)

* Fixed effect model used