Table 3.

Multivariable adjusted OR (95% CI) for quantity 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	1.06 (0.59–1.90)	0.84	1.74 (0.99–3.08)	0.06
Model 1: sex, age, BMI	Reference	1.20 (0.66–2.17)	0.55	2.16 (1.21–3.87)	0.01
Model 2: model 1 + smoking status	Reference	1.17 (0.64–2.12)	0.61	2.17 (1.21–3.90)	0.01
Model 3: model 2 + hypertension, hyperglycemia, dyslipidemia	Reference	1.17 (0.64–2.12)	0.61	2.16 (1.20–3.89)	0.01
Model 4: model 3 + sleep duration	Reference	1.15 (0.63–2.09)	0.65	2.11 (1.17–3.81)	0.01
Model 5: model 4 + work hours per day	Reference	1.12 (0.61–2.04)	0.72	2.10 (1.16–3.80)	0.01
Model 6: model 5 + smoking environment at workplace	Reference	1.31 (0.70–2.46)	0.40	2.19 (1.20–4.00)	0.01

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

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