Table 2—

Association between various factors and 30-day mortality in chronic obstructive pulmonary disease patients according to two follow-up sources

TotalIn-hospital
Age yrs
 35–5411
 55–641.38 (0.55–3.46)1.77 (0.59–5.30)
 65–745.22 (2.31–11.79)7.11 (2.63–19.20)
 75–8411.53 (5.14–25.86)15.97 (5.96–42.83)
 ≥8525.48 (11.36–57.18)31.51 (11.74–84.61)
Sex
 Female11
 Male1.34 (1.17–1.53)1.19 (1.03–1.37)
Place of residence
 Outside Rome11
 Rome1.50 (1.31–1.71)1.58 (1.37–1.81)
Admission ward
 Appropriate#11
 Acceptable1.16 (0.97–1.38)1.29 (1.06–1.57)
 Not appropriate1.41 (1.09–1.82)1.63 (1.24–2.13)
Follow-up time days
 0–611
 7–130.63 (0.53–0.75)0.58 (0.48–0.69)
 14–200.50 (0.42–0.61)0.40 (0.33–0.49)
 21–300.41 (0.34–0.48)0.27 (0.22–0.33)
Number of comorbidities+
 011
 11.21 (1.02–1.44)1.21 (1.00–1.45)
 21.55 (1.30–1.83)1.44 (1.20–1.73)
 ≥32.03 (1.64–2.51)1.89 (1.50–2.38)
Hospitalisation in the past 2 yrs+
 011
 11.04 (0.89–1.23)0.97 (0.81–1.15)
 21.21 (1.04–1.41)1.07 (0.91–1.26)
Hospitalisation in the past 2 yrs with respiratory failure+
 011
 11.30 (0.96–1.78)1.24 (0.88–1.74)
 23.58(2.47–5.20)3.44 (2.30–5.14)
  • Data are presented as adjusted rate ratio (95% confidence interval). #: pneumology and intensive care unit; : general medicine, geriatrics, causality ward; +: these variables were estimated in different models due to the colinearity with the last variable. The results for all other factors were obtained from the model that includes the number of comorbidities.