Table 3. Relationship between age and pulmonary impairment in patients previously treated for pulmonary tuberculosis.^a .

Age, years	Gender	n	Any impairment	Pattern of impairmentb,c			Reduced pulmonary functiond
				Obstructive	Restrictive	Mixed
20-29	Male	7	1 (7.1)	1 (7.1)	0 (0)	0 (0)	0 (0)
	Female	7
	Total	14
30-39	Male	22	10 (31.3)	6 (18.8)	2 (6.3)	1 (3.1)	4 (12.5)
	Female	10
	Total	32
40-49	Male	39	25 (42.4)	24 (40.7)	1 (1.7)	0 (0)	12 (20.3)
	Female	20
	Total	59
50-59	Male	36	31 (63.3)	21 (42.9)	7 (14.3)	3 (6.1)	21 (42.9)
	Female	13
	Total	49
60-69	Male	18	18 (56.3)	13 (40.6)	2 (6.25)	2 (6.3)	12 (37.5)
	Female	14
	Total	32
≥ 70	Male	10	17 (60.7)	9 (32.1)	6 (21.43)	2 (7.1)	11 (39.3)
	Female	18
Total	28

LLN = lower limit of normal. ^aValues are given as n(%). ^bAn obstructive pattern was defined as an FEV₁/VC ratio < the lower limit of normal (LLN) and a TLC ≥ LLN; a restrictive pattern was defined as a TLC < LLN and an FEV₁/VC ratio ≥ LLN; a mixed pattern was defined as an FEV₁/VC ratio < LLN and a TLC < LLN; and a nonspecific pattern was defined as a TLC ≥ LLN, an FEV₁/VC ratio ≥ LLN, and an FEV₁ or FVC < LLN. ^cTwo patients presented with a nonspecific pattern (data not shown). ^dDefined as an FEV₁ < LLN.