Table 3.

Model discrimination, as assessed using pseudo-R², Somers’ D, and Harrell’s C

Statistic	37-condition model	20-condition model	Reduced model
Pseudo-R2	0.153	0.152	0.153
Somers’ D	0.851	0.847	0.851
Harrell’s Ca
Development	0.9253 (0.0022)	0.9236 (0.0022)	0.9255 (0.0021)
Validation 1	0.9200 (0.0035)	0.9184 (0.0035)	0.9206 (0.0035)
Validation 2, 1-year follow-up	0.9204 (0.0033)	0.9182 (0.0033)	0.9203 (0.0033)
Validation 2, 5-year follow-up	0.9071 (0.0016)	0.9055 (0.0016)	0.9072 (0.0016)

^a Data in brackets are standard error.