Table 2.
Association of static omega sign with potential predictors among MDD subjects.
| Variables | Static omega sign | ||||
|---|---|---|---|---|---|
| No (174) | Yes (56) | Analysis | |||
| % | % | X2 | Cramer’s V | P | |
| Male | 28.7 | 46.4 | 5.99 | 0.16 | 0.01* |
| Marital status | |||||
| Married/Cohabitating | 40.4 | 39.1 | 0.02 | 0.01 | 0.88 |
| Employment status, yes | 53.8 | 41.3 | 2.18 | 0.11 | 0.14 |
| Education | |||||
| Tertiary level or above | 38.8 | 23.9 | 0.02 | 0.13 | 0.07 |
| Family income monthly < 15,000 HKD | 37.2 | 31.8 | 0.42 | 0.05 | 0.52 |
| Smoking, occasionally or often | 11.2 | 7.0 | / | 0.06 | 0.57 |
| Alcohol use, occasionally or often | 15.9 | 4.7 | 3.62 | 0.14 | 0.06 |
| Number of major depressive episodes ≥ 2 | 48.6 | 47.5 | 0.02 | 0.01 | 0.90 |
| Anxious depression | 20.7 | 26.8 | 0.91 | 0.06 | 0.34 |
| Psychotropic | |||||
| Antidepressants | 66.3 | 79.2 | 3.20 | 0.12 | 0.07 |
| Anxiolytics | 30.2 | 26.4 | 0.28 | 0.04 | 0.60 |
| Antipsychotics | 20.1 | 26.4 | 0.94 | 0.07 | 0.33 |
| Mood stabilizer | 5.3 | 7.5 | / | 0.04 | 0.52 |
| Polypharmacy (≥ 2 psychotropics) | 36.7 | 39.6 | 0.15 | 0.03 | 0.70 |
| Comorbidity | |||||
| Panic disorder (lifetime) | 10.1 | 6.3 | / | 0.06 | 0.58 |
| Agoraphobia (current) | 5.3 | 4.2 | / | 0.02 | 1.00 |
| Social phobia (current) | 5.9 | 4.2 | / | 0.03 | 1.00 |
| OCD (current) | 2.4 | 0 | / | 0.07 | 0.58 |
| GAD (current) | 7.1 | 20.8 | / | 0.19 | 0.01* |
| Psychotic features (lifetime) | 8.9 | 16.7 | 2.40 | 0.11 | 0.12 |
| PTSD (current) | 0.6 | 4.2 | / | 0.13 | 0.12 |
| Mean (SD) | Mean (SD) | Z | r | P | |
| Age, y | 49.5 (11.3) | 57.9 (6.9) | −5.29 | −0.35 | < 0.001*** |
| HAMD-17 score | 9.0 (6.4) | 10.5 (7.4) | −1.21 | −0.08 | 0.23 |
| Duration of illness, y | 14.4 (10.9) | 14.8 (11.0) | −0.23 | −0.02 | 0.82 |
OCD obsessive-compulsive disorder, GAD generalized anxiety disorder, PTSD post-traumatic stress disorder. Comparisons were conducted by using Mann-Whitney U test, Chi-square test, or Fisher’s exact test where applicable. r = The Rank-Biserial Correlation Coefficient.
***P < 0.001, *P < 0.05.