Table 1. Descriptive statistics of the CES-D, PHQ-9 and the SF-12 v2 MCS and Socio-demographic characteristics of study subjects (n = 3686).
| Scale score | |||
| Floor | Ceiling | ||
| Mean CES-D (SD) | 9.5 (9.3) | 12.9% | 0.0% |
| Mean PHQ-9 (SD) | 4.4 (4.4) | 18.8% | 0.0% |
| Mean SF-12 v2 MCS (SD) | 53.0 (11.2) | 0.0% | 0.0% |
| Socio-demographics | |||
| Gender (n, %) | |||
| Male | 1,531 (41.5%) | ||
| Female | 2,140 (58.1%) | ||
| Missing | 15 (0.4%) | ||
| Mean age (SD) | 49.4 (17.3) | ||
| Age group (n, %) | |||
| 18–24 years | 247 (6.7%) | ||
| 25–34 years | 647 (17.6%) | ||
| 35–44 years | 619 (16.8%) | ||
| 45–54 years | 675 (18.3%) | ||
| 55–64 years | 696 (18.9%) | ||
| ≥ 65 years | 757 (20.5%) | ||
| Missing | 45 (1.2%) | ||
| Education level (n, %) | |||
| No formal school | 233 (6.3%) | ||
| Primary | 675 (18.3%) | ||
| Secondary | 1,585 (43.0%) | ||
| Tertiary | 1,185 (32.1%) | ||
| Missing | 8 (0.2%) | ||
| Marital status (n, %) | |||
| Single | 934 (25.3%) | ||
| Married | 2,322 (63.0%) | ||
| Widow(er) | 283 (7.7%) | ||
| Separated or divorced | 137 (3.7%) | ||
| Missing | 10 (0.3%) | ||
| Employment status (n, %) | |||
| Working | 2,260 (61.3%) | ||
| Not Working | 1,417 (38.4%) | ||
| Missing | 9 (0.2%) | ||
| Monthly household income (n, %) | |||
| ≤ $5,000 | 473 (12.8%) | ||
| $5,001–10,000 | 297 (8.1%) | ||
| $10,001–20,000 | 696 (18.9%) | ||
| $20,001–30,000 | 623 (16.9%) | ||
| $30,001–40,000 | 442 (12.0%) | ||
| > $40,000 | 839 (22.8%) | ||
| Missing | 316 (8.6%) | ||
CES-D: the Center for Epidemiologic Studies Depression Scale
PHQ-9: the Patient Health Questionnaire-9
SD: standard deviation
SF-12 v2 MCS: the Short Form-12 Health Survey version 2 Mental Component Summary