Table 2.

Serum 25(OH)D levels according to demographic, behavioural and intake variables among adolescents aged 15 to 17 years, Juiz de Fora city, Brazil

		Serum 25(OH)D level (nmol/l)
Variable	%	Median	IQR	P value
Sex				0·150
Female	44·4	24·8	12·8
Male	55·6	22·1	11·5
Age (years)†				0·738
15	28·7	23·4	2·7
16	36·9	24·7	2·9
17	34·4	24·1	0·1
Physical activity				0·854
Active	61·9	24·0	12·6
Sedentary	38·1	24·1	10·3
Vitamin D intake				0·886
≥5 μg/d	1·2	26·9	13·7
<5 μg/d	88·8	26·5	1·0
%BF†				0·016*
Eutrophic	25·6	24·9a	15·5
Overweight	23·1	27·6a	14·9
Obese	51·3	22·6b	22·6
WC (cm)				0·005*
<90th percentile	83·1	24·9	12·9
≥90th percentile	16·9	20·3	10·8
Height (cm)				0·044*
≥10th percentile	91·9	24·8	12·8
<10th percentile	8·1	19·8	6·8
TC (mg/dl)				0·011*
<150	53·8	25·6	13·1
≥150	46·2	21·6	11·3
HDL-C (mg/dl)				0·941
≥45	71·2	22·9	10·2
<45	28·8	24·9	15·0
LDL-C (mg/dl)				0·057
<100	84·4	24·8	12·6
≥100	15·6	22·1	11·0
TAG (mg/dl)				0·110
<130	86·9	24·7	12·7
≥130	13·1	21·7	14·7
PTHi (nmol/l)				0·088
<65	87·5	24·7	11·2
≥65	12·5	20·2	14·8
Glucose (mg/dl)				0·471
≤99	97·5	24·0	11·8
>99	2·5	31·9	29·4
HOMA-IR				<0·001*
≤3·16	86·3	25·2	13·1
>3·16	13·7	19·3	6·6
Insulin (μU/ml)				<0·001*
≤15	86·3	25·6	12·7
>15	13·7	18·6	5·2
BP (mmHg)				0·017*
<90th percentile	68·1	24·9	13·2
≥90th percentile	31·9	21·3	10·4

25(OH)D, calcidiol; IQR, interquartile range; %BF, percentage of body fat; WC, waist circumference; TC, total cholesterol; HDL-C, HDL-cholesterol; LDL-C, LDL-cholesterol; PTH_i, intact parathyroid hormone; HOMA-IR, homeostasis model assessment of insulin resistance; BP, blood pressure.

^a,bMedian values within a column with unlike superscript letters were significantly different (P < 0·05).

*Significant result.

†These values were compared between groups using the Kruskal–Wallis test; otherwise, the Mann–Whitney test was used.