TABLE 2.

Adjusted relative risk (RR) of readmission within 30 days of discharge for each factor in the multivariable model

Factor	Adjusted RR (95% CI)
Patient
Age (per one year increasing increment)	1.03 (1.02 to 1.03)
Sex (male versus female)	0.92 (0.85 to 0.99)
Number of diagnoses (more than one versus one)	1.18 (1.09 to 1.27)
Hospital admission
Length of stay (two days or more versus less than two days)	1.05 (0.97 to 1.13)
Procedure during stay (yes versus no)	0.48 (0.44 to 0.53)
In-hospital complication (yes versus no)	1.43 (1.16 to 1.75)
Hospital admission within six months before index admission (yes versus no)	3.93 (3.58 to 4.30)