Skip to main content
. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: J Pain Symptom Manage. 2015 Dec 17;51(5):938–946. doi: 10.1016/j.jpainsymman.2015.12.303

Table 3. Responses to the PHQ-9 Itemsa.

Baseline 3-Month 6-Month
Item Valid n (%) Valid n (%) Valid n (%)
1. Anhedonia 191 127 127
 not at all 106 (55.5) 81 (63.8) 87 (68.5)
 several days 42 (22.0) 37 (29.1) 30 (23.6)
 more than half the days 22 (11.5 4 (3.1) 9 (7.1)
 nearly every day 21 (11.0) 5 (3.9) 1 (0.8)
2. Depressed mood 190 126 126
 not at all 92 (48.4) 75 (59.5) 84 (66.7)
 several days 71 (37.4) 39 (31.0) 31 (24.6)
 more than half the days 17 (8.9) 6 (4.8) 7 (5.6)
 nearly every day 10 (5.3) 6 (4.8) 8 (3.2)
3. Sleep disturbance 193 128 128
 not at all 68 (35.2) 62 (48.4) 58 (45.3)
 several days 69 (35.8) 44 (34.4) 46 (35.9)
 more than half the days 28 (14.5) 11 (8.6) 14 (10.9)
 nearly every day 28 (14.5) 11 (8.6) 10 (7.8)
4. Low energy 193 128 128
 not at all 57 (29.5) 52 (40.6) 47 (36.7)
 several days 82 (42.5) 42 (32.8) 55 (43.0)
 more than half the days 30 (15.5) 20 (15.6) 17 (13.3)
 nearly every day 24 (12.4) 14 (10.9) 9 (7.0)
5. Eating disturbance 191 126 126
 not at all 89 (46.6) 75 (59.5) 75 (59.5)
 several days 55 (28.8) 28 (22.2) 32 (25.4)
 more than half the days 27 (14.1) 18 (14.3) 13 (10.3)
 nearly every day 20 (10.5) 5 (4.0) 6 (4.8)
6. Low self-worth 191 128 128
 not at all 140 (73.3) 81 (63.3) 82 (64.1)
 several days 36 (18.8) 37 (28.9) 35 (27.3)
 more than half the days 7 (3.7) 6 (4.7) 7 (5.5)
 nearly every day 8 (4.2) 4 (3.1) 4 (3.1)
7. Trouble concentrating 187 126 126
 not at all 88 (47.1) 81 (64.3) 87 (69.0)
 several days 58 (31.0) 28 (22.2) 30 (23.8)
 more than half the days 20 (10.7) 11 (8.7) 8 (6.3)
 nearly every day 21 (11.2) 6 (4.8) 1 (0.8)
8. Psychomotor disturbance 186 125 125
 not at all 140 (75.3) 102 (81.6) 107 (85.6)
 several days 27 (14.5) 16 (12.8) 13 (10.4)
 more than half the days 11 (5.9) 4 (3.2) 5 (4.0)
 nearly every day 8 (4.3) 3 (2.4) 0 (0.0)
9. Suicidal ideation 185 123 123
 not at all 183 (98.9) 113 (91.9) 113 (91.9)
 several days 2 (1.1) 8 (6.5) 8 (6.5)
 more than half the days 0 (0.0) 1 (0.8) 2 (1.6)
 nearly every day 0 (0.0) 1 (0.8) 0 (0.0)
a

Respondents are included for each item and time point for which they provided data used in at least one of the analyses for the current study.