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Table 3 Estimated hazard ratios from a Cox proportional hazard regression with time to hospital readmission as the dependent variable. After propensity-score adjustment, and controlling for demographic and other patient characteristics, patients on a sulfonylurea were 29 % more likely to be readmitted to the hospital than patients on another oral antihyperglycemic agent. Unmarried patients and patients with eye disease were also more likely to be readmitted

From: Sulfonylurea use and the risk of hospital readmission in patients with type 2 diabetes

Independent variable a Hazard ratio 95 % confidence interval p-value
Sulfonylurea 1.29 1.01–1.65 0.042
Age 1.01 0.98–1.03 0.749
Male 0.96 0.61–1.28 0.838
Race    
 African American 0.89 0.66–1.28 0.512
 Other 0.96 0.61–1.52 0.867
 White 1.00   
Region    
 Northeast 1.00 0.65–1.44 0.864
 Midwest 0.86 0.62–1.18 0.349
 West 1.28 0.94–1.74 0.110
 South 1.00   
Unmarried 1.44 1.04–1.99 0.030
Period of first hospital admission    
 1999–2003 0.69 0.37–1.28 0.235
 2008–2010 0.49 0.31–0.78 0.003
 2004–2007 1.00   
Cardiovascular disease 1.30 0.89–1.89 0.147
Renal disease 1.34 0.90–1.98 0.589
Eye disease 1.45 1.06–2.00 0.022
Perceived health status    
 Good 0.76 0.49–1.18 0.221
 Fair or poor 1.09 0.70–1.67 0.709
 Excellent or very good 1.00   
Physical limitations 1.09 0.79–1.51 0.589
  1. a The patient propensity score was also included in the regression. Its estimated coefficient was not statistically significant (p > 0.100)