Table 2.

Demographic information on the participants in the three studies of respiratory health among male coffee workers in Tanzania and Ethiopia.

	Tanzaniaa		Ethiopiab
	Controlsc	Coffee workers	Controlsd	Coffee workers
	n = 120	n = 140	n = 110	n = 115
Response rate (%)	100	88	94
Age (years); AM (range)	29 (19–51)	33 (19–65)**	31 (18–68)	35 (18–68)**
Years at school; AM (range)	9 (0–15)	7 (0–16)**	9 (0–16)	7 (0–16)**
Years of current work; AM (range)	5 (0.2–23)	5 (0.2–35)	3 (1–6)	7 (1–30)**
Current smokers; n (%)	14 (12)	52 (37)**	4 (3.6)	3 (2.6)
Cumulative dust (mg/m3.year); AM (range)		19 (0.5–120)		129 (4–595)

^aSakwari et al. (15).

^bAbaya et al. (16).

^cWater bottling (n = 60) and fish factory (n = 60) workers.

^dWater bottling workers;

^**p < 0.01.