Table 2.

Multivariable adjusted OR (95% CI) for quality of work productivity at work and airflow limitation severity

	Normal lung function, n=1,280	Mild AL, n=48	P-value	Moderate-to-severe AL, n=50	P-value
Crude	Reference	1.25 (0.70–2.22)	0.46	1.59 (0.91–2.81)	0.11
Model 1: sex, age, BMI	Reference	1.40 (0.78–2.51)	0.27	1.97 (1.10–3.52)	0.02
Model 2: model 1 + smoking status	Reference	1.40 (0.78–2.52)	0.27	2.01 (1.12–3.60)	0.02
Model 3: model 2 + hypertension, hyperglycemia, dyslipidemia	Reference	1.40 (0.78–2.53)	0.26	1.99 (1.11–3.58)	0.02
Model 4: model 3 + sleep duration	Reference	1.38 (0.76–2.49)	0.29	1.95 (1.08–3.51)	0.03
Model 5: model 4 + work hours per day	Reference	1.35 (0.76–2.45)	0.32	1.94 (1.07–3.50)	0.03
Model 6: model 5 + smoking environment at workplace	Reference	1.51 (0.81–2.82)	0.20	2.04 (1.12–3.71)	0.02

Note: Total number of study subjects =1,378.

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