Table 4

Slope and intercept of the calibration in internal validation cohort before and after adjustment

Before slope and intercept adjustmentAfter slope and intercept adjustment
SlopeInterceptSlopeIntercept
Severe exacerbation
1 month0.968 (0.703, 1.233)−0.006 (−0.014, 0.003)1.015 (0.734, 1.296)−0.001 (−0.008, 0.007)
6 months0.989 (0.682, 1.297)−0.019 (−0.055, 0.016)1.004 (0.688, 1.319)−0.001 (−0.032, 0.031)
12 months0.890 (0.772, 1.008)−0.012 (−0.034, 0.009)1.018 (0.846, 1.188)−0.011 (−0.038, 0.016)
COPD-specific readmission
1 month1.005 (0.634, 1.376)−0.006 (−0.016, 0.004)1.003 (0.635, 1.372)0.000 (−0.009, 0.008)
6 months1.007 (0.625, 1.389)−0.020 (−0.063, 0.022)0.985 (0.593, 1.377)0.003 (−0.035, 0.040)
12 months0.910 (0.736, 1.083)−0.014 (−0.045, 0.016)0.988 (0.724, 1.253)−0.003 (−0.044, 0.037)
  • COPD, chronic obstructive pulmonary disease.