Table 1.

Recent meta‐analyses of RCTs of vitamin D supplementation and cancer mortality. NR, not reported.

First author, year, reference	Databases searched	Literature searched until	Number of included studies (references)	Included participants	Cancer deaths	Statistical model for pooling	RR (95% CI)
Keum 2019 [4]	PubMed, EMBASE	November 2018	5 [9, 10, 11, 12, 13]	75 241	1107	Random effects	0.87 (0.79–0.96)
Haykal 2019 [6]	PubMed, EMBASE, CENTRAL	December 2018	5 [9, 11, 13, 39, 40]	31 163	1533	Random effects	0.87 (0.79–0.96)
Zhang X 2019 [7]	PubMed, EMBASE	August 2018	7 [9, 10, 11, 12, 13, 41, 42]	NR	1763	Random effects	0.87 (0.79–0.95)