Table 1

Baseline characteristics of study participants by serum 25-OH vitamin D concentration
Characteristic All children (n = 121) Vitamin D level P value
Deficient (<= 20) n = 28 (23%) Insufficient (21–29 ng/mL) n = 37 (32%) Sufficient (> = 30 ng/mL) n = 56 (45%)
Age (y) mean (range) 4.4 (2–6) 4.5 (2–6) 4.9 (2–6) 4.1 (2–6) 0.06
Male sex [n (%)] 73 (60) 17 (61) 23 (62) 33 (59) 0.84
Black race [n (%)] 109 (90) 28 (100) 33 (89) 48 (86) 0.05
BMI (kg/m2) 17.8 (4.1) 17.9 (4.7) 18.7 (5.7) 17.2 (2.1) 0.85
Public health insurance [n (%)] (n = 118) 106 (90) 21 (78) 34 (94) 51 (93) 0.07
Household income less than $15,000/yr [n (%)] (n = 62) 34 (55) 9 (64) 10 (59) 15 (48) 0.49
Caregiver a high school graduate [n (%)] 76 (63) 19 (68) 22 (59) 35 (63) 0.62
Atopic [n (%)] (n = 120) 83 (69) 21 (78) 22 (59) 40 (71) 0.79
Number of positive skin tests (mean ± SD) (n = 120) 2.71 ± 2.91 2.89 ± 2.39 2.38 ± 2.77 2.84 ± 3.25 0.66
Acute care in the past 3 months [n (%)]
Emergency department visit 28 (23) 6 (21) 9 (24) 13 (23) 0.89
Hospitalization 4 (3) 0 (−) 1 (3) 3 (5) 0.19
Unscheduled doctor visit 22 (18) 6 (21) 6 (16) 10 (19) 0.75

Bose et al.

Bose et al. Nutrition Journal 2013 12:81   doi:10.1186/1475-2891-12-81

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