Table 2

Logistic regression analyses of associations between Total Difficulties Score ≥90th percentile (TDS90) on the Strengths and Difficulties Questionnaire (SDQ) and weight category in an unselected regional cohort of 5-year-old children in Oppland County, Norway. Results are presented unadjusted and adjusted for family and child related factors

Explanatory variable	Unadjusted				Adjusted model 1* (n=950)			Adjusted model 2*† (n=911)
Category	n	OR	95% CI	P value	OR	95% CI	P value	OR	95% CI	P value
Weight group child (NW reference)	819			0.002			0.017			0.023
UW	86	2.41	1.33 to 4.37		2.69	1.37 to 5.27		2.87	1.41 to 5.85
OW	115	1.34	0.72 to 2.51		1.04	0.51 to 2.12		1.18	0.57 to 2.45
OB	36	3.51	1.59 to 7.76		2.19	0.84 to 5.73		2.02	0.73 to 5.62
Low maternal education	1037	2.23	1.47 to 3.39	<0.001	1.44	0.86 to 2.40	0.167	1.44	0.84 to 2.46	0.187
Low paternal education	1006	2.23	1.37 to 3.62	0.001	1.66	0.94 to 2.93	0.080	1.67	0.93 to 3.01	0.086
Mother out of work	1037	4.15	2.44 to 7.07	<0.001	3.54	1.87 to 6.70	0.001	3.34	1.71 to 6.50	<0.001
Father out of work	1018	2.26	1.06 to 4.81	0.035	1.33	0.56 to 3.18	0.520	1.14	0.44 to 3.00	0.785
Mother smoking	1056	1.70	1.08 to 2.67	0.021	1.09	0.63 to 1.91	0.753	1.06	0.59 to 1.91	0.838
Living with one caretaker	1043	1.36	0.78 to 2.36	0.282	0.85	0.42 to 1.71	0.642	0.88	0.42 to 1.84	0.732
Siblings	1035	0.66	0.36 to 1.21	0.177	0.77	0.38 to 1.59	0.486	0.88	0.42 to 1.87	0.745
Behaviour difficulties in the family	1056	2.59	1.38 to 4.85	0.003	1.55	0.73 to 3.30	0.254	1.23	0.56 to 2.71	0.610
Girl	1056	0.71	0.47 to 1.05	0.086				0.84	0.53 to 1.35	0.477
Physical activity score poorer than for peers	1044	2.99	1.55 to 5.77	0.001				2.15	0.97 to 4.77	0.059
Low nutritional standard	1040	1.48	0.86 to 2.55	0.158				1.22	0.64 to 2.35	0.550
Dental caries	1049	2.07	1.34 to 3.19	0.001				1.47	0.85 to 2.54	0.166
Difficulties in fine motor, language or social skills, or sleep	1033	3.42	2.28 to 5.13	<0.001				3.15	1.96 to 5.07	<0.001

*Family related covariates: low maternal education, low paternal education, mother out of work, father out of work, mother smoking, living with one caretaker, having siblings and ADHD in the family. Weight group of parents is not included because missing values resulted in lower numbers, but the results were essentially the same when included (n=806 in model 1 and n=782 in model 2).
†Lifestyle covariates: sex, combined physical activity score poorer than peers, low nutritional standard, dental caries and difficulties in fine motor, language or social skills, or sleep.
ADHD, attention deficit hyperactivity disorder; NW, normal weight; OB, obesity; 26 27 OW, overweight; UW, underweight.