Prediction of Length of Stay Following Elective Percutaneous Coronary Intervention

Table 4

Relative risk comparing each risk group with the reference group with respect to LOS based on the testing data set.

Risk group	MCRS*	Wu et al.^†
Very low	1.0	1.0
Low	1.13 (1.10, 1.16)	1.55 (1.50, 1.59)
Moderate	2.11 (2.01, 2.20)	2.64 (2.49, 2.81)
High	2.88 (2.72, 3.06)	3.37 (3.16, 3.60)
Very high	3.56 (3.20, 3.96)	4.42 (4.09, 4.79)
LL^‡	−170178.25	−168971.91

Legend: MCRS: mayo clinic risk score.
*Sum score for very low (MCRS = 0–5), low (MCRS = 6–8), moderate (MCRS = 9–11), high (MCRS = 12–14), and very high (MCRS ≥15).
^†Sum score for very low (0–5), low (6–10), moderate (11-12), high (13–15), and very high (≥16).
^‡LL: log likelihood.
^¶𝑃=0.000 comparing MCRS with Wu et al.’s risk score suggests that Wu et al.’s model providing a better fit.