Table 3.

Relationship between s-25(OH)D (nmol/l) and potentially associated factors in rural Nepalese children (n 280) aged 12–60 months, September–November 2012

Explanatory variable	Unadjusted regression coefficient	95 % CI	P value	Adjusted regression coefficient*	95 % CI	P value
Breast-feeding now†	7·0	4·1, 9·8	<0·001	6·6	3·1, 10·1	<0·001
Age in months‡	−4·4	−7·3, −1·5	0·003	−0·7	−4·1, 2·8	0·7
Sex§	−0·7	−3·6, 2·2	0·6	−0·7	−3·5, 2·0	0·6
Ca intake	0·0	−0·007, 0·005	0·9	0·001	−0·005, 0·007	0·6
Time spent outdoors daily||	−1·1	−4·0, 1·8	0·5	−0·3	−3·1, 2·6	0·8
Income¶	−1·8	−4·7, 1·0	0·2	−1·0	−3·9, 1·8	0·5
Type of housing**	−3·4	−6·7, −0·1	0·048	−2·8	−5·9, 0·4	0·09

s-25(OH)D, serum 25-hydroxyvitamin D.

^*Adjusted for variables that were significant in simple linear regression (breast-feeding now, type of housing and age).

^†Breast-feeding now coded as: 0=no; 1=yes.

^‡Age coded as: 1=12–36 months; 2=37–60 months.

^§Sex coded as: 1=boy; 2=girl.

^||Time spent outdoors coded as: 1=≤2 h; 2=>2 h.

^¶Income coded as: 1=<NRS 15 000; 2=>NRS 15 000.

^**Type of housing coded as: 1=mud and wood; 2=concrete.