Table 1.

Distribution of injuries and Kappa coefficients of reliability for coding the injury type at the patient level

Type	n (%)a	Kappa
Number of surgeons per case	5
A Compression fracture(s) only	87 (79 %)	0.81
B Tension band injury (without C-type)	15 (14 %)	0.71
C Displacement injury	8 (7 %)	0.81
All cases	110	0.77

Because several injuries could be coded in any of the cases, data were collapsed at the patient level and each case was classified as having “only A-type injuries” (A), “a B-type injury (with or without A type) excluding a C-type injury” (B), or “with at least a C-type injury” (C)

^aEstimation of case distribution by latent class analysis