Table 5. Age-adjusted and multivariable hazard ratios (HRs) of mortality from respiratory diseases according to baseline history of diabetes, stratified by body mass index.

	Body mass index <25 kg/m2			Body mass index ≥25 kg/m2
	Baseline history of diabetes			Baseline history of diabetes			Pinteraction
	Yes	No	P trend	Yes	No	P trend
Person-years	33,391	1,006,460		11,541	273,969
Total respiratory diseases
Deaths	125	2,063		27	323
HRa (95% CI)	1.39 (1.16–1.66)	1.00	<0.001	1.66 (1.12–2.46)	1.00	0.01	0.78
HRb (95% CI)	1.19 (0.99–1.43)	1.00	0.06	1.63 (1.08–2.45)	1.00	0.02	0.99
Respiratory infection
Deaths	92	1,255		19	203
HRa (95% CI)	1.68 (1.36–2.08)	1.00	<0.001	1.90 (1.19–3.05)	1.00	0.01	0.39
HRb (95% CI)	1.48 (1.19–1.84)	1.00	<0.001	1.82 (1.12–2.98)	1.00	0.02	0.54
COPD
Deaths	11	344		4	31
HRa (95% CI)	0.72 (0.40–1.32)	0.29	0.29	2.15 (0.76–6.12)	1.00	0.15	0.98
HRb (95% CI)	0.56 (0.31–1.03)	1.00	0.06	2.13 (0.72–6.31)	1.00	0.17	0.88
Other respiratory diseases
Deaths	22	464		4	89
HRa (95% CI)	1.09 (0.71–1.68)	1.00	0.68	0.91 (0.33–2.49)	1.00	0.86	0.44
HRb (95% CI)	0.95 (0.62–1.47)	1.00	0.82	0.93 (0.33–2.57)	1.00	0.88	0.41

CI, confidence interval; COPD, chronic obstructive pulmonary disease; HR, hazard ratio.

^aAdjusted for age.

^bAdjusted for age, sex, educational level, smoking, alcohol consumption, sports activity, walking time, family history of diabetes.