Table 2. Possible factors associated with non-sufficiency of vitamin D in women in the postpartum period.

	Non-sufficiencyc			Sufficiency		PR (95% CI)	p a
	n	%		n	%
Season of the year
Fall	42	21.9		9	26.5	1	0.40
Other seasons	150	78.1		25	73.5	0.95 (0.87–1.05)
Ethnicity
Caucasian	100	52.1		18	52.9	1	0.92
Non-Caucasian	92	47.9		16	47.1	1.00 (0.90–1.12)
Sunlight exposure during pregnancy b
Yes	41	37.5		4	16.0	1	0.054
No	80	62.5		21	84.0	1.10 (0.99–1.22)
Multivitamin supplements b
Yes	120	97.6		22	95.7	1	0.68
No	3	2.4		1	4.3	0.88 (0.50–1.57)
Place of residence
Rural	32	16.7		2	5.9	1	0.14
Urban	160	83.3		32	94.1	0.35 (0.08–1.40)
Sunscreen protection in pregnancy b
Yes	47	38.2		8	34.8	1	0.75
No	76	61.8		15	65.2	0.97 (0.84–1.12)

PR prevalence ratio; 95% CI, confidence interval.

^aPoisson regression.

^bn=146 women answered.

^cNon-sufficiency (deficiency+insufficiency of vitamin D).