Table 2.

Differences between eating-disordered behavior (EDB) negatively and positively screened groups of adolescents in selected variables.

Variable	Total (n = 780)		Boys (n = 436)		Girls (n = 344)
	Negatively Screened (n = 572)	Positively Screened (n = 208)	Negatively Screened (n = 356)	Positively Screened (n = 80)	Negatively Screened (n = 216)	Positively Screened (n = 128)
Age	13.46 ± 1.31	13.41 ± 1.24	13.53 ± 1.30	13.30 ± 1.25	13.34 ± 1.32	13.49 ± 1.24
Body height (cm)	162.38 ± 10.74	162.08 ± 9.03	163.98 ± 11.84	164.06 ± 10.75	159.74 ± 7.96	16.85 ± 7.54
Body weight (kg)	51.33 ± 12.19	57.47 ± 13.31 **	52.94 ± 13.20	60.87 ± 17.01 **	48.68 ± 9.80	55.34 ± 9.84 **
BMI	19.26 ± 3.19	21.71 ± 3.97 **	19.44 ± 3.27	22.31 ± 4.75 **	19.00 ± 3.04	21.34 ± 3.35 **
Body fat mass (kg)	9.61 ± 5.98	15.23 ± 8.23 **	8.79 ± 6.00	15.00 ± 10.09 **	10.98 ± 5.7	15.37 ± 6.85 **
Body fat percentage (%)	18.13 ± 8.35	25.39 ± 9.47 **	16.02 ± 8.07	23.08 ± 11.08 **	21.60 ± 7.65	26.83 ± 8.03 **
Body fat mass index	3.66 ± 2.27	5.8 ± 3.11 **	3.29 ± 2.24	5.56 ± 3.68 **	4.28 ± 2.20	5.96 ± 2.69 **
Fat free mass (kg)	41.74 ± 9.62	42.24 ± 8.67	44.16 ± 10.55	45.86 ± 11.29	37.70 ± 6.05	39.97 ± 5.45 **
Fat free mass index	15.59 ± 1.93	15.91 ± 1.81 *	16.15 ± 1.99	16.76 ± 2.27 *	14.69 ± 1.44	15.39 ± 1.21 **
Skeletal muscle mass (kg)	22.74 ± 5.79	23.02 ± 5.21	24.23 ± 6.34	25.22 ± 6.81	20.28 ± 3.63	21.64 ± 3.24 **
Minerals (kg)	2.89 ± 0.66	2.97 ± 0.60	3.03 ± 0.74	3.19 ± 0.78	2.67 ± 0.44	2.85 ± 0.41 **
Proteins (kg)	8.20 ± 1.92	8.29 ± 1.73	8.70±2.10	9.02 ± 2.26	7.39 ± 1.20	7.84 ± 1.08 **
Body image	2.82 ± 0.81	3.46 ± 0.87 **	2.81 ± 0.79	3.3 ± 0.93 **	2.85 ± 0.84	3.56 ± 0.82 **
SCOFF QS	0.58 ± 0.49	2.39 ± 0.64 **	0.55 ± 0.50	2.39 ± 0.70 **	0.64 ± 0.48	2.39 ± 0.60 **
Physical activity (days)	5.44 ± 1.97	5.40 ± 1.97	5.62 ± 1.95	6.09 ± 1.90 *	5.14 ± 1.97	4.97 ± 1.89

Note: **—p ˂ 0.001; *—p ˂ 0.05; BMI—body mass index; SCOFF QS—SCOFF questionnaire score (number of “yes” answers).