Table 5. Predictors associated with BMI z-score change according to regression analysis.

BMI z-score change	B	SE	95% CI	P
Age, yr	−0.026	0.026	−0.079, 0.026	0.315
Sex (female)	−0.072	0.091	−0.253, 0.109	0.431
Re-examination duration, mon	−0.002	0.020	−0.042, 0.038	0.906
Monthly income (100,000 KRW)	0.002	0.003	−0.003, 0.008	0.372
Maternal working hours, hr/day	0.023	0.013	−0.004, 0.049	0.091
Sedentary time change, hr/day	0.016	0.008	0.001, 0.032	0.037
Fast-food intake change, frequency/wk	0.067	0.027	0.013, 0.122	0.016

Linear regression analysis with change values computed as postintervention–preintervention values.

BMI = body mass index, KRW = Korean Republic Won.