Table 1.
Baseline characteristics among 42 257 patients admitted to their first cardiac CT procedure due to chest pain from 1 January 2008 to 31 December 2016 in Denmark
| Non-RA patients | Patients with RA | |||
| N | % | N | % | |
| No of patients | 41 899 | 99.2 | 358 | 0.8 |
| Age, median (IQR)* | 57.24 (49.1–65.1) | 62.7 (55.7–70.1) | ||
| Gender | ||||
| Male | 18 438 | 44.0 | 84 | 23.5 |
| Female | 23 461 | 56.0 | 274 | 76.5 |
| Comorbidity according to Charlson | ||||
| No comorbidity | 29 989 | 71.6 | 204 | 57.0 |
| Moderate comorbidity | 6675 | 15.9 | 75 | 20.9 |
| Severe comorbidity | 5235 | 12.5 | 79 | 22.1 |
| Diabetes, N (%) | 3308 | 7.9 | 31 | 8.7 |
| BMI (kg/m2) | ||||
| <18.5 | 455 | 1.1 | 6 | 1.7 |
| 18.5≤25 | 13 568 | 32.4 | 132 | 36.9 |
| 25≤30 | 14 463 | 34.5 | 122 | 34.1 |
| ≤30 | 7278 | 17.4 | 61 | 17.0 |
| Missing | 6136 | 14.6 | 37 | 10.3 |
| Hypertension, N (%) | 19 203 | 45.8 | 200 | 55.9 |
| Treatment with lipid-lowing drugs N (%) | 14 115 | 33.7 | 143 | 39.9 |
| Smoking | ||||
| Current smoker | 8766 | 20.9 | 57 | 15.9 |
| Former smoker | 13 362 | 31.9 | 147 | 41.0 |
| Never smoker | 16 410 | 39.2 | 120 | 33.5 |
| Missing | 2361 | 8,2 | 34 | 9.5 |
| Level of stenosis | ||||
| Non-obstructive CAD | 12 657 | 30.2 | 122 | 34.1 |
| 1-vessel obstructive CAD | 4014 | 9.6 | 37 | 10.3 |
| 2-vessel obstructive CAD | 959 | 2.3 | 13 | 3.6 |
| 3-vessel/LM obstructive CAD | 246 | 0.6 | 5 | 1.4 |
| Missing | 63 | 0.2 | 1 | 0.3 |
| Calcium score | ||||
| 0 | 19 690 | 47.0 | 132 | 36.9 |
| 1–99 | 9789 | 23.4 | 101 | 28.2 |
| 100–399 | 4331 | 10.3 | 41 | 11.5 |
| >399 | 2706 | 6.5 | 37 | 10.3 |
| Missing | 5384 | 12.8 | 47 | 13.1 |
*Age at time for first cardiac CT due to chest pain.
BMI, body mass index; CAD, coronary artery disease; LM, Left Main; RA, rheumatoid arthritis.