Table 5

Age and height adjusted regression coefficients β and standard errors (SE) for the number of TB episodes and 25 055 subjects known to be HIV positive or HIV negative

		n		FVC			FEV₁			FEV₁%		FEF_25-75%
		n		β	SE		β	SE		β	SE	β	SE
HIV negative
1 episode of TB	747	−0.172	0.020^5-165		−0.233	0.018^5-165	−2.439	0.260^5-165	−0.523	0.045^5-165
2 episodes of TB	218	−0.332	0.037^5-165		−0.377	0.033^5-165	−3.066	0.475^5-165	−0.769	0.082^5-165
3+ episodes of TB	73	−0.485	0.064^5-165		−0.529	0.057^5-165	−4.084	0.814^5-165	−0.918	0.301^5-165
HIV positive
1 episode of TB	234	−0.162	0.036^5-165		−0.210	0.032^5-165	−1.586	0.457^5-165	−0.382	0.079^5-165
2 episodes of TB	55	−0.433	0.073^5-165		−0.479	0.066^5-165	−3.273	0.939^5-165	−0.863	0.163^5-165
3+ episodes of TB	16	−0.500	0.136^5-165		−0.564	0.122^5-165	−4.520	1.739^5-160	−0.974	0.301^5-160
Total	df = 25053^5-151	R²= 0.3511			R² = 0.3784		R² = 0.1095		R² = 0.2447

TB = tuberculosis; FEV₁ = forced expiratory volume in one second; FVC = forced vital capacity; FEF_25–75% = forced expiratory flow at 25–75% of forced vital capacity.
↵5-160 p<0.01;
↵5-165 p<0.001.
↵5-151 There were 23 712 miners who did not have TB who were used as a comparison group in the regression model.