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Table 4 Results of Cox proportional hazard models

From: Using medication utilization information to develop an asthma severity classification model

 

Model 1 (4 groups)

Model 2 (3 groups)

Model 3 (2 groups)

HR(95%CI)

p-value

HR(95%CI)

p-value

HR(95%CI)

p-value

Asthma severity

Stage 1

Reference

 

Reference

 

Reference

 

Stage 2

1.389(0.741–2.603)

0.3053

Stage 3

1.597(1.133–2.252)

0.0075

1.547(1.105–2.165)

0.0109

1.634(1.211–2.203)

0.0013

Stage 4

1.916(1.220–3.010)

0.0047

1.857(1.189–2.900)

0.0065

  1. HR hazard ratio, CI confidence interval
  2. After adjusted for age, gender, Charlson Comorbidity Index, obesity, Sinusitis, and Gastroesophageal reflux disease