Randomized Trial Of Vitamin D Supplementation To Prevent Seasonal Influenza A In Schoolchildren
Notes for this study:
||RR: 0.17, P = 0.006
|Number of Subjects
||1-6, 7-12, 13-17
In a randomized, double-blind, placebo-controlled trial, 334 school children were given 1200 IU of vitamin D or placebo daily for 4 months from December to the end of March.
96 participants dropped out of the study and weren't analyzed. The primary outcome was the incidence of influenza A, and the vitamin D group had a significantly lower rate. The vitamin D group had a nonsignificantly higher rate of influenza B, asthma, and gastroenteritis, the same rate of influenza-like illness, nonspecific febrile disease, and pneumonia.