Table 2. Risk stratification according to Caprini RAM score and binary logistic regression for risk level (N = 24,524).

Risk level	N	DVT Incidence	OR	95% CI	P
Low risk (0–1)	7,089 (28.9%)	15 (0.2%)	1
Moderate risk (2)	4,946 (20.2%)	22 (0.4%)	2.10	1.09–4.07	0.026*
High risk (3–4)	5,126 (20.9%)	36 (0.7%)	3.34	1.82–6.10	< 0.001***
Highest risk with Score 5–6	3,161 (12.9%)	43 (1.4%)	6.50	3.61–11.72	< 0.001***
Highest risk with Score 7–8	2,689 (11.0%)	55 (2.1%)	9.85	5.56–17.46	< 0.001***
Highest risk with Score ≥ 9	1,513 (6.2%)	50 (3.3%)	16.12	9.03–28.78	< 0.001***
P trend					< 0.001***

DVT, deep vein thrombosis; CI, confidence interval; OR, odds ratio; RAM, risk assessment model.