Table 3.
Prevalence and test performance of the single item screener using the “depressive mood” definition of the 9-item Patient Health Questionnaire (PHQ-9) as reference standard (95% confidence interval)
| Age group | Prevalence | Sensitivity | Specifity | ROC area | LR+ | LR- | PPV | NPV |
|---|---|---|---|---|---|---|---|---|
| 34-44 |
20 (17–23.3) |
37.5 (29.1-46.5) |
96.5 (94.5-97.9) |
.67 (.627-.713) |
10.6 (6.42-17.7) |
.648 (.556-.742) |
72.7 (60.4-83) |
86 (82.9-88.8) |
| 45-54 |
25 (22–27.9) |
46.1 (38.7-53.7) |
95.5 (93.4-97) |
.708 (.67-.745) |
10.2 (6.72-15.4) |
.565 (.493-.647) |
76.9 (67.8-84.4) |
84.4 (81.3-87.2) |
| 55-64 |
31 (28–34.9) |
45.8 (39.4-52.4) |
93.7 (91.3-95.6) |
.698 (.664-.731) |
7.26 (5.08-10.4) |
.578 (.514-.651) |
76.9 (69.1-83.6) |
79 (75.6-82.2) |
| 65-74 |
32 (28–35.6) |
47.9 (41–54.8) |
92.7 (89.9-94.9) |
.703 .667-.739) |
6.54 (4.58-9.35) |
.562 (.493-.642) |
75.4 (67.2-82.4) |
79.2 (75.4-82.6) |
| 75-85 |
34 (29–39.4) |
52.5 (43.2-61.6) |
91 (86.6-94.3) |
.717 (.669-.765) |
5.82 3.74-9.05) |
.523 (.432-.632) |
75.3 (64.7-84) |
78.5 (73.1-83.3) |
| Female |
34 (32–36.3) |
48.8 (44.6-53.1) |
92.3 (90.5-93.8) |
.705 (.683-.728) |
6.31 (5.05-7.89) |
.555 (.51-.603) |
76.4 (71.6-80.8) |
77.8 (75.4-80.1) |
| Male |
22 (20–23.8) |
41.5 (36.1-47) |
96.1 (94.8-97.1) |
.688 (.661-.715 |
10.6 (7.76-14.4) |
.809 (.555-.667) |
74.5 (67.5-80.6) |
85.6 (83.6-87.5) |
| Total | 28 (26–29.6) | 46.1 (42.8-49.4) | 94.3 (93.2-95.2) | .702 (.685-.719) | 8.04 (6.71-9.64) | .572 (.538-.608) | 75.7 (71.9-79.3) | 81.8 (80.3-83.3) |
ROC: receiver operating characteristic; LR+: positive likelihood ratio; LR-: negative likelihood ratio; PPV: positive predictive value; NPV: negative predictive value.