| GDS-15 | Geriatric Depression Scale-15 |
| IQR | Interquartile range |
| LMIC | low- and middle-income countries |
| MOS-SSS | Medical Outcomes Study Social Support Survey |
| PSS-4 | Perceived Stress Scale-4 |
| SPSS | Statistical Package for the Social Sciences |
| VIF | variance inflation factor |
| WHO | World Health Organization |
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