Fig. 1
From: Injury coding in a national trauma registry: a one-year validation audit in a level 1 trauma centre
Bland–Altman plot for ISS and NISS in NTR versus the reference standard. Bland–Altman ISS and NISS plot for 144 patients quantify agreement in the national trauma registry (NTR) compared to the expert group consensus coding (EGCC). The X -axis presents the mean between the paired measured (a) ISS and (b) NISS in the EGCC and the NTR. Y-axis presents the difference between the paired a) ISS b) NISS in the EGCC versus the NTR. Mean difference ISS 0.194, 95% CI (± 2SD of the mean difference) upper limit + 13.8 and lower limit − 13.4. Mean difference NISS 0.924, 95% CI (± 2SD of the mean difference) upper limit + 16.2, and lower limit–14.4