Table 2. Distribution of population and PE prevalence according to Wells Score.

	Population Frequency		PE Prevalence
Wells Score	US (N = 358) N (%)	OUS (N = 702) N (%)	US	OUS	P (US vs OUS)
0	201 (56.1%)	367 (52.3%)	1 (0.5%)	5 (1.4%)	0.4
1	5 (1.4%)	13 (1.9%)	0	2 (15.4%)	1
1.5	81 (22.6%)	131 (18.7)	2 (2.5%)	15 (11.5%)	0.02
2.5	1 (0.3%)	0	0	0
3	47 (13.1%)	108 (15.4%)	3 (6.4%)	25 (23.1%)	0.01
4	1 (0.3%)	4 (0.6%)	0	1 (25%)	1
4.5	20 (5.6%)	66 (9.4%)	3 (15%)	20 (30.3%)	0.25
5.5	0	2 (0.3%)	0	1
6	2 (0.6%)	11 (1.6%)	0	6 (54.5%)	0.46
Low	287 (80.2%)	511 (72.8)	3 (1%)	22 (4.3%)	0.01
Moderate	71 (19.8%)	191 (27.2%)	6 (8.5%)	53 (27.7%)	0.0007

US, US patients; OUS, outside US patients

P value regards PE Prevalence