TABLE 4.

Spirometry and induced sputum results according to sex

	Male	Female	P
Patients, n	26	43
Age, years	34.7±8.2	36.3±10.8	0.50
Pack-year history	0.12±0.33	0.42±1.26	0.23
FEV1, L	4.29±0.7	3.34±0.61	<0.0001
FEV1, % predicted	103±12.2	108.2±11.9	0.085
FVC, L	5.41±0.92	4.18±0.82	<0.0001
FVC, % predicted	105.2±11.8	109.7±21.7	0.33
FEV1/FVC	0.80±0.06	0.80±0.06	0.61
Total cell count, ×106 cells/g	2.562±2.367	2.388±1.961	0.70
Neutrophils, ×106 cells/g	1.262±1.610	1.181±1.434	0.66
Neutrophils, %	46.9±23.6	52.3±23.6	0.36
Eosinophils*, ×106 cells/g	0.005 (0.041)	0.004 (0.056)	0.87
Eosinophils*, %	0.3 (1.5)	0.3 (3.1)	0.73
Macrophages*, ×106 cells/g	0.973 (1.214)	0.655 (0.846)	0.43
Macrophages*, %	45.7 (24)	41.3 (22.2)	0.47
Lymphocytes*, ×106 cells/g	0.0 (0)	0.004 (0.049)	0.72
Lymphocytes*, %	0.0 (0)	1.0 (2.8)	0.93
Bronchial epithelial cells*, ×106 cells/g	0.014 (0.027)	0.0 (0.013)	0.08
Bronchial epithelial cells*, %	1.0 (3.9)	0.0 (2.1)	0.08

Data presented as mean ± SD.

^*Non-normally distributed variables reported as median (interquartile range). P values derived from the independent t test for normally distributed data and the Wilcoxon rank-sum test for nonparametric data. FEV₁ Forced expiratory volume in 1 s; FVC Forced vital capacity