Table 2

Mean observed (in litres) and percentage predicted values of forced expiratory volume in one second (FEV₁) according to the number of episodes of tuberculosis

Age (years)		Pulmonary tuberculosis
		No tuberculosis			1 episode			2 episodes			3 episodes
		n	Observed		% pred	n		Observed	% pred		n	Observed	% pred	n	Observed	% pred
20–24	339	3.79	97.6	1	4.21	109.2
25–29	2248	3.73	99.6	38	3.59	96.4	2	3.08	82.6
30–34	5416	3.61	100.1	200	3.43	95.5	13	3.18	88.6	2	3.74	104.3
35–39	5466	3.45	100.2	355	3.31	96.5	38	3.09	90.3	5	2.36	68.5
40–44	4100	3.30	100.7	417	3.12	95.4	75	3.02	92.3	17	2.71	83.0
45–49	2906	3.16	101.8	444	2.95	95.4	104	2.75	89.0	36	2.59	83.9
50–54	1870	2.99	102.3	367	2.77	95.1	64	2.63	90.0	18	2.46	84.0
55–60	1059	2.83	103.3	246	2.60	95.0	58	2.44	88.1	14	2.25	82.2
60>	308	2.65	103.9	69	2.46	95.6	12	2.29	89.4	4	2.38	93.5
Total	23712			2137			366			96