Nutritional supplements v placebo or no supplements in patients being treated for active tuberculosis*

Supplements	Outcomes	Number of trials (n)	Weighted event rates	RRR (95% CI)	NNT (CI)
Vitamin D	Positive sputum smear at 6 weeks	2 (226)	6% v 17%	67% (24 to 86)	9 (7 to 25)
	Positive sputum smear at 8 weeks	2 (267)	6% v 6%	0% (−149 to 60)	NS
Multivitamin + trace element	Death during follow-up	3 (2190)	24% v 24%	2% (−13 to 15)	NS

				RRI (CI)	NNH (CI)
Multivitamin + trace element	Positive sputum smear or culture at 1 month	2 (1020)	31% v 31%	1% (−15 to 20)	NS

*NS, not significant; other abbreviations defined in glossary. Weighted event rates, RRR, RRI, NNT, NNH, and CI calculated from data in article using a fixed-effect model.