Table 2. Replicability of the PHQ-9 results at t1 and t2 alone compared to the stability of the PHQ-9 results in the PHQ-9 and GP rating concordant vs. discordant subgroup at t1.
| All responders1 (N = 263) | |||||||
|---|---|---|---|---|---|---|---|
| Depression (PHQ-9≥10) at t2 | PHQ-9 at t1 | PHQ-9 at t2 | No depression (PHQ-9<10) at t2 | PHQ-9 at t1 | PHQ-9 at t2 | All | |
| Depression (PHQ-9≥10) at t1 | 25 (53.2) | 15.2±4.9 | 15.2±3.5 | 22 (46.8) | 12.4±2.1 | 6.1±1.9 | 47 (17.9) |
| 14; 10–27 | 15; 10–25 | 12; 10–17 | 6.7; 1–9 | ||||
| No depression (PHQ-9<10) at t1 | 22 (10.2) | 5.3±2.9 | 12.2±2.4 | 194 (89.8) | 3.1±2.5 | 3.3±2.2 | 216 (82.1) |
| 5; 0–9 | 11; 10–18 | 2.5; 0–9 | 3; 0–9 | ||||
| Concordant subgroup at t1 (N = 208) | |||||||
| Depression (PHQ-9≥10) at t2 | PHQ-9 at t1 | PHQ-9 at t2 | No depression (PHQ-9<10) at t2 | PHQ-9 at t1 | PHQ-9 at t2 | All | |
| Depression (PHQ-9≥10) at t1 | 17 (63.0) | 16.6±5.3 | 15.5±3.9 | 10 (37.0) | 12.3±2.3 | 6.2±1.4 | 27 (13.0) |
| 17; 10–27 | 15; 10–25 | 12; 10–16 | 6.4; 4–8 | ||||
| No depression (PHQ-9<10) at t1 | 15 (8.3) | 4.7±2.9 | 11.8±2.2 | 166 (91.7) | 2.9±2.4 | 3.1±2.1 | 181 (87.0) |
| 4; 0–9 | 11; 10–16 | 2; 0–9 | 3; 0–9 | ||||
| Discordant subgroup at t1 (N = 55) | |||||||
| Depression (PHQ-9≥10) at t2 | PHQ-9 at t1 | PHQ-9 at t2 | No depression (PHQ-9<10) at t2 | PHQ-9 at t1 | PHQ-9 mean t2 | All | |
| Depression (PHQ-9≥10) at t1 | 8 (40.0) | 12.1±2.0 | 14.7±2.8 | 12 (60.0) | 12.5±2.0 | 6.0±2.4 | 20 (36.4) |
| 12; 10–16 | 14; 12–20 | 12; 10–17 | 6.9; 1–9 | ||||
| No depression (PHQ-9<10) at t1 | 7 (20.0) | 6.7±2.1 | 13.1±2.8 | 28 (80.0) | 4.3±2.8 | 4.3±2.5 | 35 (63.6) |
| 7; 4–9 | 13; 10–18 | 3.5; 0–9 | 4; 0–9 | ||||
1With complete PHQ-9 response; Descriptive statistics are n (%), Mean ± Standard Deviation and Median (Range).