Table 1 Baseline characteristics.
From: Cohort design and natural language processing to reduce bias in electronic health records research
C3PO1 (N = 520,868) | C3PO – MI/stroke (N = 198,184)2 | MI/stroke Convenience Sample (N = 340,226)2 | C3PO – AF (N = 174,644)2 | AF Convenience Sample (N = 501,272)2 | |
|---|---|---|---|---|---|
Mean ± SD, Median (quartile 1, quartile 3), or N (%) | |||||
Age (years) | 48.4 ± 17.1 | 57.0 ± 10.3 | 56.2 ± 10.4 | 60.9 ± 10.0 | 61.4 ± 10.5 |
Women | 315,577 (60.6%) | 116,448 (58.8%) | 195,039 (57.3%) | 106,279 (60.9%) | 288,334 (57.5%) |
White | 389,755 (74.8%) | 154,712 (78.1%) | 270,002 (79.4%) | 140,746 (79.6%) | 422,266 (84.2%) |
Black | 38,104 (7.3%) | 13,805 (7.0%) | 21,248 (6.2%) | 11,103 (6.4%) | 22,787 (4.5%) |
Hispanic or Latino | 33,762 (6.5%) | 9401 (4.7%) | 15,142 (4.5%) | 6804 (3.9%) | 14,115 (2.8%) |
Asian or Pacific Islander | 21,701 (4.2%) | 7807 (3.9%) | 13,219 (3.9%) | 6003 (3.4%) | 14,329 (2.9%) |
Mixed | 27 (0.05%) | 11 (0.06%) | 24 (0.07%) | 7 (0.04%) | 23 (0.04%) |
Other | 18,774 (3.6%) | 5716 (2.9%) | 8937 (2.6%) | 4467 (2.6%) | 9023 (1.8%) |
Unknown | 18,745 (3.6%) | 6732 (3.4%) | 11,654 (3.4%) | 5514 (3.2%) | 18,729 (3.7%) |
Height (cm) | 167.4 ± 10.4 | – | – | 166.6 ± 10.4 | 167.4 ± 10.3 |
Weight (kg) | 78.3 ± 20.3 | – | – | 79.4 ± 19.5 | 79.8 ± 19.8 |
Systolic blood pressure (mmHg) | 123 ± 17 | 126 ± 17 | 127 ± 18 | 128 ± 17 | 130 ± 19 |
Diastolic blood pressure (mmHg) | 75 ± 10 | – | – | 76 ± 10 | 77 ± 11 |
Current smoker | 27,202 (5.2%) | 14,720 (7.4%) | 12,652 (3.7%) | 14,031 (8.0%) | 22,020 (4.4%) |
Anti-hypertensive use | 147,898 (28.4%) | 77,827 (39.3%) | 119,954 (35.3%) | 78,219 (44.8%) | 173,235 (34.6%) |
Diabetes | 58,159 (11.2%) | 29,307 (14.8%) | 43,966 (12.9%) | 27,953 (16.0%) | 52,180 (10.4%) |
Heart failure | 12,555 (2.4%) | – | – | 3334 (1.9%) | 16,786 (3.3%) |
Myocardial infarction | 17,937 (3.4%) | – | – | 6641 (3.8%) | 18,260 (3.6%) |
Total cholesterol (g/dL) | 189 ± 39 | 195 ± 39 | 194 ± 40 | – | – |
HDL cholesterol (g/dL) | 55 ± 18 | 57 ± 18 | 57 ± 18 | – | – |
Follow-up, years | 7.2 (2.6, 12.9) | 7.3 (2.8, 11.9) | 7.4 (3.5, 11.8) | 6.5 (2.5, 11.1) | 5.4 (2.2, 9.8) |
