Method: The study was carried out in the second and third weeks of April 2012. Three hundred sixty-four men (husbands of mothers who presented in labor) participated in the study. A questionnaire was administered and vitamin D level was measured in the blood. Bivariate and multiple linear regression analysis were used to evaluate differences between variables. P-value <0.05 was considered significant.
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Al-Mahroos et al. (2013) studied this question.