Table 9.

Impact of vitamin D supplementation on fatal asthma attacks

Study reference	Sample size (VitD/placebo)	Fatal asthma attacks (VitD)	Fatal asthma attacks (placebo)	Risk difference (95% CI)
Castro 2014 [11]	202/208	0	0	0.00 [$-$0.01, 0.01]
Jensen 2016 [35]	12/12	0	0	0.00 [$-$0.15, 0.16]
Majak 2009 [27]	17/17	0	0	0.00 [$-$0.11, 0.11]
Majak 2011 [28]	25/25	0	0	0.00 [$-$0.09, 0.09]
Martineau 2015 [34]	126/126	0	0	0.00 [0.01, 0.01]
Tachimoto 2016 [36]	55/36	0	0	0.00 [$-$0.04, 0.04]
Total (95% CI)	437/424			0.00 [$-$0.02, 0.02]