Table 2.

Internal validation results showing the percentage of chronic obstructive pulmonary disease (COPD) congestive heart failure (CHF), and total hip arthroplasty/total knee arthroplasty (THA/TKA) patients correctly-assigned to a subgroup by the classification models in each condition.

Models		Quantiles						Summary, mean (SD; range)
		Q 0.025	Q 0.25	Q 0.50	Q 0.75	Q 0.975
COPD
	Training (n=10842)	99.90	100.00	100.00	100.00	100.00	100 (0.02; 99.7-100)
	Testing (n=3615)	99.30	99.40	99.60	99.60	99.80	99.6 (0.15; 99.1-100)
CHF
	Training (n=19254)	99.40	99.50	99.60	99.60	99.80	99.57 (0.11; 99-99.9)
	Testing (n=6418)	99.00	99.30	99.30	99.40	99.60	99.34 (0.15; 98.7-99.7)
THA/TKA
	Training (n=5257)	100.00	100.00	100.00	100.00	100.00	100 (0; 100-100)
	Testing (n=1753)	99.70	99.80	99.90	99.90	100.00	99.86 (0.09; 99.4-100)