Table 5.

Linear mixed effects models for the association between cumulative dust exposure and three lung function variables among 239 male coffee workers in Tanzania and Ethiopia (random effect; country).

Variables	B	95%CI		p-value
FEV1 (L/s); 39.6%a
Intercept	−0.750	−2.391	0.892	0.37
Age (years)	−0.025	−0.032	−0.018	<0.001
Height (m)	2.908	1.968	3.848	<0.001
Current smoking (yes/no)	−0.030	−0.185	0.125	0.70
Cumulative dust (mg/m3.year)	−0.0009	−0.0018	−0.0001	0.028
FVC (l); 31.7%a
Intercept	−1.812	−3.584	−0.042	0.045
Age (years)	−0.024	−0.032	−0.017	<0.001
Height (m)	3.940	2.941	4.938	<0.001
Current smoking (yes/no)	0.0006	−0.165	0.166	0.99
Cumulative dust (mg/m3.year)	−0.0009	−0.0018	−0.00002	0.046
FEV1/FVC (%); 13.2%a
Intercept	104.725	80.036	129.414	<0.001
Age (years)	−0.145	−0.248	−0.042	0.006
Height (m)	−9.936	−24.055	4.184	0.167
Current smoking (yes/no)	−0.637	−2.962	1.689	0.59
Cumulative dust (mg/m3.year)	−0.010	−0.023	0.002	0.12

^a% of total variance explained by the fixed effects (age, height, and current smoking) in the respective models.