Table 8.

Model performance parameters.

Persistent disability					Persistent shoulder pain intensity
	CCA	MI-5	B	MI-5 + B	CCA	MI-5	B	MI-5 + B
calibration slope	0.978	0.978	1.077	0.978	0.985	0.973	0.998	0.986
R2N	0.119	0.120	0.088	0.120	0.188	0.162	0.135	0.174
Ac 95% CI	0.666 0.616,0.715	0.667 0.624,0.710	0.645 0.596,0.694	0.667 0.624,0.710	0.717 0.668,0.766	0.702 0.660,0.745	0.684 0.637,0.732	0.710 0.668,0.752
Opt	0.027	0.022	0.023	0.022	0.030	0.014	0.018	0.022
Oc	0.639	0.646	0.622	0.646	0.686	0.688	0.667	0.688

Ac               - apparent c-index

B                - bootstrapping based on a complete case data set

CCA            - complete case analysis

MI-5+B        - multiple imputation combined with bootstrapping

MI-5            - multiple imputation using 5 imputation files

Oc              - optimism corrected c-index

Opt             - estimation of the overoptimism

R²_N            - explained variance (Nagelkerke's R-squared)

95% CI        - 95% confidence interval