Table 2 Correlation coefficients showing the correlation between various item scores and between item scores and total scale score of PHQ-9
| Â | Item-1 | Item-2 | Item-3 | Item-4 | Item-5 | Item-6 | Item-7 | Item-8 | Item-9 |
|---|---|---|---|---|---|---|---|---|---|
Item-1 | 1.000 | – | – | – | – | – | – | – | – |
Item-2 | 0.660** | 1.000 | – | – | – | – | – | – | – |
Item-3 | 0.434** | 0.475** | 1.000 | – | – | – | – | – | – |
Item-4 | 0.638** | 0.531** | 0.586** | 1.000 | – | – | – | – | – |
Item-5 | 0.365** | 0.354** | 0.419** | 0.450** | 1.000 | – | – | – | – |
Item-6 | 0.566** | 0.747** | 0.423** | 0.462** | 0.387** | 1.000 | – | – | – |
Item-7 | 0.608** | 0.601** | 0.426** | 0.571** | 0.382** | 0.644** | 1.000 | – | – |
Item-8 | 0.558** | 0.556** | 0.369** | 0.503** | 0.245* | 0.549** | 0.599** | 1.000 | – |
Item-9 | 0.387** | 0.527** | 0.233* | 0.268** | 0.299** | 0.513** | 0.426** | 0.438** | 1.000 |
Total scores | 0.789** | 0.787** | 0.647** | 0.743** | 0.567** | 0.788** | 0.769** | 0.684** | 0.569** |