Document Classification

Section Type: RESULTS

Text: There were 593 URTI episodes in the vitamin D group and 611 in the placebo group, with no statistically significant differences in the number of URTIs per participant (mean, 3. 7 per person in the vitamin D group and 3. 8 per person in the placebo group ; risk ratio, 0. 97 ; 95 % CI, 0. 85-1. 11), number of days of missed work as a result of URTIs (mean, 0. 76 days in each group ; risk ratio, 1. 03 ; 95 % CI, 0. 81-1. 30), duration of symptoms per episode (mean, 12 days in each group ; risk ratio, 0. 96 ; 95 % CI, 0. 73-1. 25), or severity of URTI episodes.