TABLE 2.

Normal range of induced sputum total and differential cell counts (×10⁶ cells/g)

	Mean ± SD	Mean −2 SD	Mean +2 SD	Median (interquartile range)	Percentile
					10th	90th
Total cell count	2.453±2.108	−1.763	6.669	2.000 (2.512)	0.328	5.038
Neutrophils	1.212±1.491	−1.77	4.194	0.721 (1.016)	0.159	2.918
Eosinophils	0.034±0.069	−0.104	0.172	0.005 (0.043)	0.000	0.096
Macrophages	1.050±1.213	−1.376	3.476	0.696 (1.005)	0.108	1.914
Lymphocytes	0.057±0.161	−0.265	0.379	0.001 (0.049)	0.000	0.138
Bronchial epithelial cells	0.041±0.126	−0.211	0.293	0.000 (0.027)	0.000	0.089