Odds ratio (99% CI) performed with ordinary logistic regression; p value | |||
Crude estimates | Model 1, n=3921 | Model 2, n=3575 | |
Sex (girls vs boys) | 1.26 (1.06 to 1.48); 0.0004 | 1.30 (1.08 to 1.56); 0.0002 | 1.29 (1.06 to 1.56); 0.0008 |
Migration background (non-Nordic vs Nordic) | 0.78 (0.65 to 0.94); 0.0006 | 0.74 (0.60 to 0.91); 0.0002 | 0.69 (0.55 to 0.87); <0.0001 |
ADHD/ADD (yes vs no) | 0.31 (0.25 to 0.40); <0.0001 | 0.35 (0.27 to 0.45); <0.0001 | 0.33 (0.26 to 0.44); <0.0001 |
Anxiety/depression (yes vs no) | 0.43 (0.35 to 0.53); <0.0001 | 0.45 (0.36 to 0.57); <0.0001 | 0.43 (0.34 to 0.55); <0.0001 |
BMI SDS at start of treatment | 0.47 (0.38 to 0.58); <0.0001 | 0.51 (0.40 to 0.64); <0.0001 | 0.48 (0.38 to 0.62); <0.0001 |
Age at start of treatment | 0.96 (0.93 to 1.01); 0.0234 | 1.01 (0.96 to 1.06); 0.60 | 1.01 (0.96 to 1.06); 0.805 |
Treatment response* | |||
Good response versus no response | 1.46 (1.15 to 1.85); <0.0001 | 1.34 (1.04 to 1.72); 0.0031 | 1.28 (0.98 to 1.67); 0.0182 |
Poor response versus no response | 0.78 (0.60 to 1.02); 0.0167 | 0.72 (0.54 to 0.96); 0.0028 | 0.71 (0.53 to 0.96); 0.003 |
Dropouts versus no response | 0.71 (0.58 to 0.87); <0.0001 | 0.69 (0.55 to 0.86); <0.0001 | 0.68 (0.54 to 0.87); <0.0001 |
Parental SES | |||
Medium-low versus low parental SES | 1.63 (1.31 to 2.03); <0.0001 | 1.56 (1.24 to 1.98); <0.0001 | |
Medium-high versus low parental SES | 2.40 (1.90 to 3.05); <0.0001 | 2.19 (1.69 to 2.83); <0.0001 | |
High versus low parental SES | 2.99 (2.11 to 4.22); <0.0001 | 2.83 (1.95 to 4.12); <0.0001 | |
Maternal education | |||
Upper secondary school versus compulsory school | 1.74 (1.44 to 2.09); <0.0001 | 1.57 (1.27 to 1.94); <0.0001 | |
University degree versus compulsory school | 2.47 (1.94 to 3.16); <0.0001 | 2.23 (1.67 to 2.98); <0.0001 | |
Paternal education | |||
Upper secondary school versus compulsory school | 1.48 (1.23 to 1.79); <0.0001 | 1.26 (1.03 to 1.55); 0.004 | |
University degree versus compulsory school | 1.92 (1.44 to 2.56); <0.0001 | 1.41 (1.01 to 1.95); 0.0076 |
Model 1: variables included were sex, migration background, ADHD/ADD, anxiety/depression, BMI SDS and age at start of treatment, treatment response and parental SES.
Model 2: variables included were sex, migration background, ADHD/ADD, anxiety/depression, BMI SDS and age at start of treatment, treatment response, and maternal and paternal education.
*Good response=decrease of BMI SDS ≥0.25 units; no response=BMI SDS ±0.24 units; poor response=increase of BMI SDS ≥0.25 units; dropouts=no follow-up measure or less than 1 year between their first and last measure.
ADHD/ADD, attention deficit disorder with or without hyperactivity; BMI SDS, body mass index SD score; SES, socioeconomic status.