Prediction of Length of Stay Following Elective Percutaneous Coronary Intervention

Table 3

Length of stay (in days) by risk category.

	Risk category
	Very low	Low	Moderate	High	Very high
Testing data set (%)
MCRS^†	18.7%	65.7%	11.3%	3.7%	0.6%
Wu et al.^‡	53.2%	40.2%	3.2%	2.4%	1.0%
TSPC^§	58.7%	20.2%	14.4%	1.3%	5.5%
Conditional mean of LOS from corresponding model
MCRS	3.2	3.5	5.8	7.8	9.4
Wu et al.	3.3	4.3	6.9	9.1	11.1
TSPC	3.2	3.9	4.4	6.4	8.7

Legend: MCRS = Mayo clinic risk score; TSPC: tree-structured prognostic classification.
^†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).
^§Very low = (no heart failure and <70 years and without renal failure), low = (no heart failure and ≥ 70 years and male), moderate = (no heart failure and ≥70 years and female), high = (no heart failure and <70 years and with renal failure), and very high = (heart failure present).