Table 4.

Multivariable adjusted OR (95% CI) for the presence of sick leave and airflow limitation severity

	Normal lung function, n=1,038	Mild AL, n=36	P-value	Moderate-to-severe AL, n=37	P-value
Crude	Reference	1.09 (0.56–2.15)	0.79	1.80 (0.93–3.48)	0.08
Model 1: sex, age, BMI	Reference	1.23 (0.62–2.44)	0.56	2.45 (1.24–4.86)	0.01
Model 2: model 1 + smoking status	Reference	1.19 (0.59–2.36)	0.63	2.40 (1.21–4.76)	0.01
Model 3: model 2 + hypertension, hyperglycemia, dyslipidemia	Reference	1.22 (0.61–2.43)	0.58	2.43 (1.22–4.85)	0.01
Model 4: model 3 + sleep duration	Reference	1.21 (0.61–2.43)	0.59	2.50 (1.25–5.00)	0.01
Model 5: model 4 + work hours per day	Reference	1.24 (0.62–2.49)	0.55	2.51 (1.25–5.02)	0.01
Model 6: model 5 + smoking environment at workplace	Reference	1.36 (0.67–2.76)	0.40	2.69 (1.33–5.44)	0.006

Notes: Total number of study subjects was 1,111 including 1,038 normal lung function, 36 mild AL, and 37 moderate-to-severe AL.

Abbreviations: AL, airflow limitation; OR, odds ratio; CI, confidence interval; BMI, body mass index.