Table 2. Duval and Tweedie’s trim and fill for the effect of smoking on tuberculosis treatment outcomes.

	Fixed Effect				Random Effects
	Studies Trimmed	Point Estimate	Lower Limit	Upper Limit	Point Estimate	Lower Limit	Upper Limit
Observed values		1.396	1.330	1.465	1.511	1.303	1.751
Adjusted values	2	1.391	1.326	1.460	1.467	1.260	1.708