Table 4 Logistic regression analysis
Variables | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
OR (95% CI) | p-value | OR (95% CI) | p-value | |
Gender | ||||
 Female | Reference |  | Reference |  |
 Male | 3.2 (1.1–9.5) | 0.03 | 5.6 (1.6–19.8) | 0.007 |
Age (years) | ||||
  ≤ 20 | 2.1 (0.5–7.7) | 0.26 | 2.8 (0.6–11.3) | 0.15 |
 21–30 | Reference |  | Reference |  |
 31–40 | 1.1 (0.2–4.5) | 0.87 | 1.3 (0.2–5.9) | 0.71 |
  > 40 | 2.1 (0.6–7.3) | 0.20 | 2.5 (0.6–9.1) | 0.16 |
All prescribed drugs | ||||
 1 | Reference |  | Reference |  |
 2–3 | 2.9 (0.3–22.7) | 0.32 | 5.5 (0.5–57.2) | 0.14 |
  > 3 | 3.5 (0.4–28.9) | 0.25 | 8.5 (0.6–111.3) | 0.10 |
QT prolonging Drugs | ||||
 1 | Reference |  | Reference |  |
  ≥ 2 | 1.7 (0.7–3.9) | 0.22 | 1.9 (0.6–5.1) | 0.23 |
Medical illnesses | ||||
 Psychosis | 1.2 (0.2–5.1) | 0.84 | 5.7 (0.7–41.8) | 0.08 |
 Obsessive compulsive disorder | 2.1 (0.4–10.1) | 0.32 | 2.3 (0.2–19.9) | 0.45 |
 Schizophrenia | 1.04 (0.1–8.2) | 0.97 | 8.2 (0.7–95.1) | 0.09 |
 Major depression | 0.8 (0.3–1.9) | 0.67 | 3.8 (0.7–20.4) | 0.11 |
 Manic depressive psychosis | 1.6 (0.4–5.6) | 0.47 | 2.3 (0.3–13.6) | 0.35 |
Co-morbid illnesses | ||||
 Hypertension | 1.3 (0.3–4.5) | 0.69 | 0.5 (0.1–2.9) | 0.50 |
 Antipsychotics | 1.6 (0.6–3.6) | 0.28 | 1.9 (0.4–9.3) | 0.38 |
 Proton pump inhibitors | 0.3 (0.04–2.4) | 0.26 | 6.6 (0.7–62.5) | 0.09 |
 Other drugs | 1.8 (0.3–8.3) | 0.44 | 0.6 (0.1–3.9) | 0.59 |