Correction: Performance of risk prediction scores for cardiovascular mortality in older persons: External validation of the SCORE OP and appraisal

There are errors in the layout of Table 2. Please see the correct Table 2 here.

Table 2. Risk scores: measures of validity.

Risk scorea	Predicted number of fatal cardiovascular events	Actual number of fatal cardiovascular eventsb	Predicted/ Actual ratio	Nam-D’Agostino chi-square (p-value)	C-indexc (95% CI)
SCORE OP high-risk regions					0.79 (0.75 to 0.83)
SCORE OP-H 5y	302	142	2.13	139.16 (p<0.001)
SCORE OP-H	677	399	1.70	327.9 (p<0.001)
SCORE OP low-risk regions					0.80 (0.75 to 0.83)
SCORE OP-L 5y	215	142	1.51	39.68 (p<0.001)
SCORE OP-L	519	397	1.31	76.29 (p<0.001)
SCORE-H	372	382	0.97	29.68 (p = 0.001)	0.72 (0.67 to 0.76)
SCORE-L	258	384	0.67	117.63 (p<0.001)	0.72 (0.67 to 0.77)

^aSCORE OP[22] and SCORE[13] systems have been previously described elsewhere. H and L indicate high- and low- cardiovascular risk regions. 5y indicates 5-year risk equations. All other scores listed are 10-year versions.

^bWeibull regression model projections beyond the observed follow-up are reported for 10-year risk scores, leading to small differences in the number of actual events. 5-year risk scores use observed Berlin Initiative Study data only using the Kaplan-Meier estimator.

^cRisk score discrimination capability was assessed using the entire observed follow-up data.