Table 1. Case characteristics.
| Detroit VTE | Detroit no-VTE | Suburban VTE | Suburban no-VTE | |
| [n = 1,490] | [n = 1,123] | [n = 417] | [n = 280] | |
| Female | 52 (49, 54) | 49 (46, 52) | 55 (50, 60) | 69 (63, 74) |
| African ancestry | 84 (82, 86) | 85 (83, 87) | 5 (3, 7) | 2 (0, 4) |
| Age (years) | 54 (53, 55) | 50 (49, 51) | 60 (58, 62) | 50 (48, 52) |
| Height (m) | 1.71 (1.71, 1.72) | 1.72 (1.71, 173) | 1.70 (1.69, 1.72) | 1.71 (1.68, 1.74) |
| [1,229] | [384] | [341] | [58] | |
| Body mass (kg) | 87 (85, 88) | 87 (85, 89) | 86 (84, 89) | 87 (81, 94) |
| [1,266] | [381] | [361] | [60] | |
| BMI (kg/m2) | 29.7 (29.2, 30.1) | 29.3 (28.5, 30.1) | 29.6 (28.8, 30.5) | 29.9 (27.9, 32.0) |
| [1,226] | [370] | [338] | [58] | |
| Smoking history | 47 (44, 49) | – | 24 (19, 28) | – |
| Diabetes mellitus | 18 (16, 20) | – | 11 (8, 14) | – |
| DVT/PE/both (n) | 956/403/131 | – | 274/93/50 | – |
| Previous VTE | 33 (30, 35) | – | 25 (21, 30) | – |
| Malignancy | 20 (18, 22) | – | 22 (18, 26) | – |
| Surgery/trauma | 14 (12, 15) | – | 21 (17, 25) | – |
| Idiopathic | 68 (66, 70) | – | 60 (58, 62) | – |
Parameters without units are expressed as percentages with 95% confidence intervals in parentheses except for indication; for which the n-values are given. Parameters with units are shown as means with 95% confidence intervals in parentheses. Values in square brackets indicate sample size – if no sample size is given, there were no missing data and the sample size corresponds to the value at the top of the column. Idiopathic indicates a venous thromboembolism that occurred when the patient did not have malignancy and had not had surgery or trauma within the preceding 90 days. BMI, body mass index; VTE, venous thromboembolism; DVT, deep vein thrombosis; PE, pulmonary embolism.