Table 2. Regression coefficients (s.e.) for change in BMI and zBMI, at the participant, family, programme and neighbourhood level from multivariable models.

Parameters	Change in BMI (N=9563)			Change in zBMI (N=9563)
	B	s.e.	P-value	B	s.e.	P-value
Fixed part
Intercept	−0.76	0.021	<0.0001	−0.18	0.0038	<0.0001
BMI baseline	−0.022	0.0020	<0.0001	0.029	0.0024	<0.0001
Age	0.018	0.0054	0.00089	0.015	0.00099	<0.0001
Sex (ref. girls)
Boys	−0.085	0.017	<0.0001	—	—	—
Ethnicity (ref. white)
Asian	0.15	0.037	<0.0001	0.029	0.0074	0.0001
Black	0.15	0.040	0.00023	0.022	0.0079	0.0056
Other	0.088	0.046	0.055	0.017	0.0090	0.056
Family structure (ref. couple)
Lone parent	0.011	0.020	0.58	0.0033	0.0040	0.41
Housing tenure (ref. owner occupied)
Social rented	0.020	0.024	0.40	0.0081	0.0047	0.086
Private rented	0.0085	0.033	0.80	0.0031	0.0067	0.65
Parental employment (ref. employed)
Unemployed	0.06	0.026	0.021	0.0099	0.0050	0.048
IDACI 2007	0.15	0.061	0.012	0.034	0.012	0.0044
Built environment	0.012	0.013	0.37	0.0017	0.0026	0.51
Urban/rural status (ref. urban)
Towns	−0.033	0.040	0.40	−0.0082	0.0078	0.29
Villages	−0.0071	0.047	0.89	−0.00010	0.0092	0·99
Number of programmes per PMa	0.0033	0.0020	0.10	—	—	—
Programme group size	0.0087	0.0039	0.025	0.0018	0.00077	0.019
Attendance (ref. completer)
Non-completer	0.21	0.074	0.0040	0.034	0.015	0.020
Partial completer	0.13	0.027	<0.0001	0.023	0.0051	<0.0001
Random part
Between programmes	0.11	0.008	<0.0001	0.0045	0.00032	<0.0001
Between participants	0.63	0.010	<0.0001	0.024	0.00039	<0.0001

Abbreviations: BMI, body mass index; IDACI, Income Deprivation Affecting Children Index; ref., reference category; zBMI, BMI-derived z-score.

^aPM, programme manager.