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. 2018 Jul 26;10(8):964. doi: 10.3390/nu10080964

Table 2.

Trial findings by trial characteristic.

Beneficial Null Effect Harmful
Overall 13 *,†,‡ 14 3
Baseline vitamin D
 All deficient 3 * 1 0
 Mean/Median deficient 11 *,†,‡ 10 3
Vitamin D supplementation
 Daily Oral 11 *,† 7 0
Outcome ascertainment
 At-event reporting 7 7 2

* trial reporting a U-shaped relationship by vitamin D level; trial reporting a significant effect by Poisson but not negative binomial distribution; trial reporting significant results after adjustment for baseline characteristics.