Table 2.

Nutritional behaviors of the individuals: In the total group and divided by gender.

Age Category (years)	Total Group		Girls		Boys		p-Value (V Cramer) Girls vs. Boys
	N	%	N	%	N	%
	Having breakfast every day before leaving for school
All age groups	8400	59.81	4178	55.32	4222	65.05
13	897	70.63	431	64.33	466	77.67	0.0000 4 (0.10)
14	1222	65.14	595	59.26	627	71.90
15	1267	63.00	587	56.44	680	70.03
16	1405	58.89	682	54.26	723	64.04
17	1620	58.25	836	54.36	784	63.12
18	1391	54.53	751	52.30	640	57.40
19	598	51.15	296	48.68	302	53.83
p-value	0.0000 1		0.0001 2		0.0000 3
V Cramer	0.10		0.08		0.14
	Consuming fresh fruit every day (at least one serving)
All age groups	8071	57.47	4506	59.66	3565	54.93
13	857	67.48	468	69.85	389	64.83	0.0000 4 (0.05)
14	1242	66.20	686	68.33	556	63.76
15	1267	63.00	673	64.71	594	61.17
16	1322	55.41	746	59.35	576	51.02
17	1490	53.58	865	56.24	625	50.32
18	1322	51.82	751	52.30	571	51.21
19	571	48.85	317	52.14	254	45.28
p-value	0.0000 1		0.0000 2		0.0000 3
V Cramer	0.13		0.13		0.13
	Consuming vegetables every day (at least two servings)
All age groups	6678	47.55	3658	48.43	3019	46.52
13	662	52.13	372	55.52	290	48.33	0.0241 4 (0.02)
14	1010	53.84	561	55.88	449	51.49
15	996	49.53	533	51.25	463	47.68
16	1130	47.36	614	48.85	516	45.70
17	1245	44.77	698	45.38	547	43.96
18	1135	44.51	616	42.90	519	46.56
19	500	42.77	264	43.42	236	42.07
p-value	0.0000 1		0.0000 2		0.0061 3
V Cramer	0.0		0.07		0.05
	Drinking milk or milk beverages (yoghurt/kefir/butter milk, etc.) every day
All age groups	8478	60.38	4172	55.24	4306	66.36
13	860	67.72	438	65.37	422	70.33	0.0000 4 (0.11)
14	1279	68.18	643	64.04	636	72.94
15	1305	64.89	610	58.65	695	71.58
16	1392	58.34	674	53.62	718	63.60
17	1583	56.92	780	50.72	803	64.65
18	1435	56.27	729	50.80	706	63.32
19	624	53.42	298	49.01	326	58.21
p-value	0.0000 1		0.0000 2		0.0000 3
V Cramer	0.10		0.11		0.09
	Consuming whole-grained bread every day
All age groups	5962	42.46	3302	43.72	2659	40.97
13	556	43.78	297	44.33	259	43.17	0.0010 4 (0.03)
14	809	43.12	447	44.52	362	41.51
15	871	43.33	467	44.95	404	41.61
16	1065	44.64	578	45.98	487	43.14
17	1198	43.08	679	44.15	519	41.71
18	1020	39.98	598	41.64	422	37.85
19	443	37.90	236	38.82	207	36.90
p-value	0.0007 1		p = 0.0566		p = 0.0548
V Cramer	0.04
	Consuming fish at least once a week
All age groups	7023	50.02	3412	45.19	3610	55.63
13	662	52.13	341	50.90	321	53.50	0.0000 4 (0.1)
14	965	51.44	463	46.12	502	57.57
15	1021	50.80	469	45.10	552	56.91
16	1188	49.81	564	44.90	624	55.27
17	1330	47.84	673	43.79	657	52.82
18	1260	49.39	626	43.59	634	56.86
19	597	51.07	276	45.39	321	57.22
p-value	0.1057		0.0640		0.2130
V Cramer
	Drinking sugared soft drinks few times a week
All age groups	7977	56.80	3764	49.83	4212	64.90
13	650	51.18	305	45.52	345	57.50	0.0000 4 (0.15)
14	1069	56.98	512	51.00	557	63.88
15	1202	59.77	540	51.92	662	68.18
16	1374	57.59	633	50.36	741	65.63
17	1546	55.59	719	46.75	827	66.51
18	1441	56.49	720	50.14	721	64.66
19	695	59.45	335	55.10	360	64.17
p-value	0.0000 1		0.0026 2		0.0019 3
V Cramer	0.05		0.05		0.06
	Consuming sweets more than once a day
All age groups	6156	43.84	3428	45.39	2727	42.02
13	548	43.15	311	46.42	237	39.50	0.0000 4 (0.03)
14	840	44.78	465	46.31	375	43.00
15	926	46.05	486	46.73	440	45.31
16	1065	44.65	573	45.62	492	43.58
17	1216	43.73	690	44.86	526	42.27
18	1068	41.87	628	43.73	440	39.46
19	493	42.17	275	45.23	218	38.86
p-value	p = 0.0912		p = 0.7863		0.0480 3
V Cramer					0.04
	Consuming fast food (e.g., chips, burgers etc.) more than two times a week
All age groups	2906	20.70	1360	18.01	1545	23.81
13	206	16.22	99	14.78	107	17.83	0.0000 4 (0.07)
14	314	16.74	145	14.54	168	19.27
15	385	19.14	170	16.35	215	22.14
16	513	21.50	226	17.98	287	25.42
17	622	22.37	299	19.44	323	25.93
18	590	23.14	295	20.54	295	26.48
19	276	23.63	125	20.56	151	26.96
p-value	0.0000 1		0.0002 2		0.0000 3
V Cramer	0.06		0.06		0.07

¹ Significant differences in the examined nutritional behaviors between age categories in the total group; ² significant differences in the examined nutritional behaviors between age categories in girls; ³ significant differences in the examined nutritional behaviors between age categories in boys; ⁴ significant differences in the examined nutritional behaviors between girls and boys, the chi² Pearson test.