Table 3 Documentation of multivariable regression, calibration, discrimination and reclassification

Part 1. Documentation of multivariable regression (n = 35)

a. Information on whether additional predictor is significant at <.05 level

b. Results of a test that penalises for the inclusion of additional predictor

Appropriate documentation (1a or 1b)

Part 2. Documentation of AUC in ROC analysis (n = 33)

a. Described method used to compare ROC curves

b. Presented the AUC values with and without the additional predictor

c. Presented CIs of AUC values with and without additional predictor

d. Presented P value for comparison

f. Availability or enable calculation of Δ AUC CIs

Appropriate documentation 1 (2a and 2b and [2c or 2d])

Appropriate documentation 2 (2a and 2b and [2c or {2d or 2f}])

Part 3. Documentation of calibration (n = 35)

Documentation of Hosmer-Lemeshaw test (n = 7) or Schoenfeld residuals (n = 1)

Part 4. Documentation of reclassification analysis (n = 35)

Report using table or text

Not reported

Partial

Complete

Standard of reporting of reclassification analysis (n = 16)

a. Use of standard categories of risk

b. Justified use of other categories of risk

c. Reported the number of patients changing categories

Appropriate documentation ([4a or 4b] and 4c)

Inadequate

Part 5. Documentation of NRI (n = 23)

Type of NRIs

Continuous/ category-free NRI

Categorical NRI

Reported both continuous & categorical NRIs

Reported relative NRI

Unclear

Standard of reporting of categorical NRI (n = 16)

a. Report censor handling

b. No extrapolation

c. Categorical NRI reference available

d. Justification of risk categories

e. Report NRI components

f. Availability of reclassification table showing event and non-event

g. Reclassification table enables the calculation of NRI components

h. Combined NRI reported as a sum not a percentage

i. The proportion of correctly reclassified subjects available

j. Reported NRI not used to construct strong summary

Adequate reporting of categorical NRI (> 5 items listed 5a–j)^a