Table 2.

Sociodemographic variations of prevalence of recurrent PB and RB

	Recurrent PB						Recurrent RB
				95% CI for odds ratio						95% CI for odds ratio
	B	s.e.	p	LL	OR	UL	B	s.e.	p	LL	OR	UL
Gender
Male (ref.)				ref	ref	ref				ref	ref	ref
Female	−0.30	0.40	0.45	0.34	0.74	1.61	−0.26	0.49	0.59	0.30	0.77	2.00
Weight statusa
Normal weight (ref.)				ref	ref	ref				ref	ref	ref
Underweight	–	–	–	–	–	–	–	–	–	–	–	–
Overweight/obese	0.59	0.44	0.17	0.77	1.81	4.25	0.50	0.51	0.31	0.61	1.66	4.49
Education
<12 years (ref.)				ref	ref	ref				ref	ref	ref
⩾12 years	1.26	0.74	0.09	0.07	0.28	1.21	−0.78	0.75	0.30	0.10	0.46	2.00

Note: Results from binary logistic regression models on differences in prevalences of recurrent PB and RB, respectively, according to gender, weight status and educational level. Of note, the underweight group needed to be excluded from the analyses due to zero cell values. Thus, in contrast to the planned analyses, we built two groups: individuals with normal weight and overweight/obesity. Total N = 2403. PB, pica behaviour; RB, rumination behaviour; CI, confidence interval; OR, odds ratio; LL, lower level; UL, upper level; ref., reference group.

^aThe underweight group needed to be excluded from the analyses due to zero cell values. We have built two groups: individuals with normal weight and individuals with overweight/obesity.