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Table 3 Crude risk ratios (RRc) and 95% confidence interval (95% CI) of cardiovascular mortality for impaired respiratory health and lung function indicators at 5 and at 12 years of survival time and p-value for interaction with baseline, results of Cox' regression analysis.

From: Does respiratory health contribute to the effects of long-term air pollution exposure on cardiovascular mortality?

Respiratory symptoms and lung function RR c , 95% CI at 5 years RR c , 95% CI at 12 years p-value for interaction with baseline
Chronic Bronchitis by physician diagnose 1.53
0.83–2.79
1.65
0.93–2.95
0.7986
Frequent cough with phlegm production 1.34
0.71–2.51
1.65
0.94–2.89
0.5377
Frequent cough 1.17
0.73–1.89
1.21
0.76–1.93
0.9006
FEV1 < 80% of predicted value 3.79
1.64–8.74
1.35
0.66–2.77
0.0303
FVC <80% of predicted value 5.03
2.10–12.02
1.89
1.01–3.57
0.0445
  1. Abbreviations:
  2. FEV1: Forced expiratory volume in 1 second; FVC: Forced vital capacity;