Skip to main content

Table 3 Analysis of Cohort Characteristics Between Mayo and TMC

From: Assessment of the impact of EHR heterogeneity for clinical research through a case study of silent brain infarction

Variables

Mayo (n = 500)

TMC (n = 500)

p Value

Age (mean)

65 (+ − 10.6)

66 (+ − 9.7)

0.1197

Gender (female)

243 (48.6)

274 (54.8)

0.0576

SBI

57 (11.4)

38 (7.6)

0.0516

Acuity

 Acuity/subacute

6 (1.2)

6 (1.2)

1.0000

 Chronic

44 (8.8)

29 (5.8)

0.0882

 Non-specified

7 (1.4)

3 (0.6)

0.3407

Location

 Lacunar/subcortical

27 (5.4)

10 (2.0)

0.0065

 Cortical/juxtacortical

9 (1.8)

13 (2.6)

0.5188

 Both

0 (0)

3 (0.6)

0.2492

 Non-specified

21(4.2)

12 (2.4)

0.1558

WMD

291 (58.2)

264 (52.8)

0.9800

WMD grading

 Mild

191 (38.2)

154 (30.8)

0.0165

 Mild/moderate

21 (4.2)

0 (0.0)

7.6963e-7

 Moderate

42 (8.4)

45 (9.0)

0.8226

 Moderate/severe

2 (0.4)

0 (0)

0.4995

 Severe

8 (1.6)

11 (2.2)

0.6443

 No mention of quantification

27 (5.4)

54 (10.8)

0.0024

  1. Definition of abbreviations: CI confidence interval, OR odds ratio