Conversion table from PHQ-9 to EQ-5D total and change scores
Total scores | Change scores | |||
PHQ-9 | EQ-5D pretreatment | EQ-5D post-treatment | PHQ-9 | EQ-5D |
0 | – | 1.00 | −25 | 0.900 |
1 | 1.00 | 1.00 | −24 | 0.850 |
2 | 1.00 | 1.00 | −23 | 0.850 |
3 | 1.00 | 0.91 | −22 | 0.742 |
4 | 1.00 | 0.89 | −21 | 0.708 |
5 | 1.00 | 0.88 | −20 | 0.683 |
6 | 0.91 | 0.85 | −19 | 0.675 |
7 | 0.89 | 0.84 | −18 | 0.643 |
8 | 0.88 | 0.81 | −17 | 0.632 |
9 | 0.85 | 0.80 | −16 | 0.609 |
10 | 0.84 | 0.77 | −15 | 0.575 |
11 | 0.83 | 0.75 | −14 | 0.532 |
12 | 0.80 | 0.72 | −13 | 0.454 |
13 | 0.77 | 0.72 | −12 | 0.401 |
14 | 0.77 | 0.69 | −11 | 0.319 |
15 | 0.73 | 0.68 | −10 | 0.238 |
16 | 0.72 | 0.65 | −9 | 0.196 |
17 | 0.69 | 0.62 | −8 | 0.143 |
18 | 0.69 | 0.55 | −7 | 0.094 |
19 | 0.65 | 0.38 | −6 | 0.047 |
20 | 0.57 | 0.36 | −5 | 0.031 |
21 | 0.41 | 0.29 | −4 | 0.016 |
22 | 0.34 | 0.24 | −3 | 0.002 |
23 | 0.27 | 0.17 | −2 | −0.013 |
24 | 0.23 | 0.12 | −1 | −0.026 |
25 | 0.17 | 0.02 | 0 | −0.038 |
26 | 0.10 | – | 1 | −0.047 |
27 | 0.04 | – | 2 | −0.070 |
3 | −0.105 | |||
4 | −0.130 | |||
5 | −0.150 | |||
6 | −0.221 | |||
7 | −0.309 | |||
8 | −0.379 | |||
9 | −0.421 | |||
10 | −0.466 | |||
11 | −0.506 | |||
12 | −0.541 | |||
13 | −0.573 | |||
14 | −0.635 | |||
15 | −0.750 | |||
16 | −0.950 | |||
17 | −1.200 |
EQ-5D, Euro-Qol Five Dimensions; PHQ-9, Patient Health Questionnaire-9.