Table 4.

Lung function among male coffee workers in Tanzania and Ethiopia.

Lung function variables	Tanzaniaa and Ethiopiab
	Controls	Coffee workers	Controls vs. coffee workers; Independent t-test;	Controls (0) vs. coffee workers (1); Mixed effects modelc
	n = 213	n = 239	p-value	B	95%CI		p-value
FEV1, L/s, AM (SD)	3.45 (0.58)	3.26 (0.60)	0.001	−0.26	−0.38	−0.15	<0.001
FVC, L, AM (SD)	4.12 (0.70)	3.96 (0.65)	0.013	−0.21	−0.35	−0.08	0.002
FEV1/FVC, %, AM (SD)	84.0 (6.0)	82.4 (7.3)	0.009	−1.65	−3.49	0.19	0.079

^aSakwari et al. (15).

^bAbaya et al. (16).

^cMixed effects model with age, height, current smoking as fixed effects, and country as random effect.