Table 3. Sample demographics and laboratory data of 102 subjects included in the study.
| Demographic data | Probands, N = 17 | Co-twins, N = 12 | Control-twins/singletons, N = 73 |
| Age (years, mean ± SD) | 49.5±12.1 | 51.1±10.6 | 39.7±14.3 |
| Sex (female %) | 58.8 | 66.7 | 57.5 |
| Cohabitation status (%) a | 23.5 | 41.7 | 64.4 |
| Higher education (%) b | 35.3 | 50.0 | 45.2 |
| Occupation status (%) c | 29.4 | 75.0 | 89.0 |
| Current medication (%) d | 82.4 | 41.7 | 16.4 |
| Current psychotropic medication (%) d | 76.5 | 25.0 | 2.7* |
| Previous/current somatic illness (%) | 41.2 | 50.0 | 20.6 |
| Previous alcohol abuse/dependence (%) | 41.1 | 8.3 | 1.4 |
| Previous history of anxiety syndrome (%) | 41.1 | 8.3 | 11.0 |
| Smoking (%) | 47.1 | 8.3 | 15.1 |
| Snuff user (%) | 29.4 | 8.3 | 11.0 |
| Body mass index (mean ± SD) | 28.0±7.8 | 27.5±6.0 | 24.2±3.6 |
| Global Assessment of Functioning [median (max-min)] | 55 (35–80) | 75 (50–100) | 80 (70–92) |
a
) Defined as living with partner/family.
b
) Defined as studies on University level.
c
) Defined as employment in the open labor.
d
) Defined as prescribed medication taken daily.
*
A twin pair unaffected by schizophrenia or bipolar disorder were on antidepressants at the time of lumbar puncture.