Table 3.
Categorical sociodemographic and health characteristics of twins with CFS and with and without PTSD.
| Characteristic | CFS with PTSD (n=39, 22.9%) n (%) | CFS without PTSD (n=131, 77.1%) n (%) | Adjusted OR1 (95% CI) |
|---|---|---|---|
| Sex | |||
| Males | 9 (23.1) | 28 (21.4) | 1.1 (0.5–2.6) |
| Females | 30 (76.9) | 103 (78.6) | 1.0 |
| Race | |||
| White | 36 (92.3) | 120 (93.8) | 0.8 (1.2–3.1) |
| Non-White | 3 (7.7) | 8 (6.3) | 1.0 |
| Married or Partnered | |||
| Yes | 11 (28.2) | 66 (51.6) | 0.3 (0.2–0.8) |
| No | 28 (71.8) | 44 (48.4) | 1.0 |
| Education level | |||
| K-12 | 17 (43.6) | 36 (28.6) | 0.5 (0.2–1.1) |
| College+ | 22 (56.4) | 90 (71.4) | 1.0 |
| Smoked at least 100 Cigarettes in Lifetime2 | |||
| Yes | 15 (57.7) | 53 (57.6) | 0.9 (0.4–2.3) |
| No | 11 (42.3) | 39 (42.4) | 1.0 |
| General Health Status2 | |||
| Good or Very Good or Excellent | 19 (48.7) | 84 (64.6) | 0.5 (0.3–1.0) |
| Fair or Poor | 20 (51.3) | 46 (35.4) | 1.0 |
1
Odds ratios describe the association between each characteristic and CFS/PTSD status, adjusted for age, sex and race, while taking into account the relatedness of twin pairs.
2
Values in the column for Smoking and General Health Status do not add up to the complete sample of CFS without PTSD because of missing values in these variables.