| PHQ-9 |
9 |
Screening, Monitoring, Severity |
5, 10, 15, 20 (mild to severe) |
Yes |
Adults (18+), General Population |
Brief, widely validated, free |
Self-report bias |
Kroenke et al., 2001 |
| CES-D |
20 |
Screening, Epidemiological Research |
16+ (clinical concern) |
Yes |
Adults (18+), Community Samples |
Good for epidemiology, broad use |
May over-identify cases |
Radloff, 1977 |
| BDI-II |
21 |
Screening, Monitoring, Severity |
14–19 mild, 20–28 moderate, 29–63 severe |
Yes |
Adolescents and Adults |
In-depth assessment, sensitive to change |
Licensed, not free |
Beck et al., 1996 |
| GDS-15 |
15 |
Screening in Older Adults |
5+ (suggests depression) |
Yes |
Older Adults (60+) |
Quick for older adults, easy language |
Limited to older adults |
Sheikh & Yesavage, 1986 |
| EPDS |
10 |
Screening for Postnatal Depression |
10+ (suggests depression) |
Yes |
Perinatal/Postnatal Individuals |
Designed for postpartum, sensitive |
Not diagnostic, cultural sensitivity needed |
Cox et al., 1987 |
| CIDI-SF |
Varies |
Structured Diagnostic Interview |
Algorithm-based |
Yes |
General Population (varies by module) |
Standardized, reliable diagnosis |
Requires trained interviewer |
WHO, 1998 |
| ICD-10 Codes |
N/A |
Administrative Diagnostic Classification |
N/A |
Yes |
Clinical/Administrative Populations |
Population-wide utility, global standard |
Lacks symptom severity detail |
WHO, 1992 |