Regional variability in use of a novel assessment of thoracolumbar spine fractures: United States versus international surgeons

Table 3 US versus non-US inter-rater agreement

	Percent Agreement	Cohen's Kappa	Weighted Kappa	Spearman's Rank Order
	Mechanism
USA (Within Group)	47.2	0.262	0.276	0.376
Non-USA (Within Group)	55.7*	0.351	0.300	0.362
Between USA and Non-USA	52.1	0.313	0.297	0.38
	Neurological Status
USA (Within Group)	97.9*	0.963	0.976	0.988*
Non-USA (Within Group)	94.9	0.911	0.958	0.981
Between USA and Non-USA	96.3	0.936	0.967	0.984
	PLC Integrity
USA (Within Group)	62.1	0.373	0.464	0.551*
Non-USA (Within Group)	60.6	0.336	0.425	0.503
Between USA and Non-USA	61.8	0.361	0.45	0.532
	Total TLISS
USA (Within Group)	31.8	0.23	0.532	0.719*
Non-USA (Within Group)	36.9*	0.28	0.528	0.697
Between USA and Non-USA	35.5	0.267	0.538	0.713
	Management
USA (Within Group)	75.7*	0.561	0.516	0.541*
Non-USA (Within Group)	72.3	0.506	0.462	0.487
Between USA and Non-USA	74.2	0.536	0.498	0.527

Inter-Rater agreement within and between USA and non-USA surgeons.
*p < 0.05 for difference between USA and non-USA surgeons. For significance tests, all unweighted coefficients were converted into Fisher's z-scores, and the difference in z-scores was divided by standard error.
A level was set at 0.05 (ΔZ/SE ≥ 1.96).

ISSN: 1749-7922