(b).

Variables	β	Standard error	p value	Odds ratio	95% CI odds ratio (lower-upper)
NAT suspected	2.198	0.730	<0.005	9.011	2.155–37.684
PRISM III score	0.276	0.060	<0.005	1.317	1.171–1.482
Constant	−5.294	0.937	<0.005	0.005

R ² = 0.552; χ² = 47.4.

NAT: nonaccidental trauma; GCS: Glasgow Coma Scale; Hgb: hemoglobin; RBC: red blood cell.