Table 2.
Sociodemographic and clinical characteristics of participants by number of anxiety‐related disorders
| Number of anxiety related disordersa | Analyses | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| All (N = 3453) | 0 (N = 1799) | 1 (N = 852) | 2 (N = 415) | 3 (N = 203) | 4 (N = 117) | 5 (N = 67) | |||||||||||||
| M | SD | M | SD | M | SD | M | SD | M | SD | M | SD | M | SD | β | SE | χ b | df | p | |
| Age | 40.3 | 13.2 | 41.7 | 13.6 | 38.8 | 12.7 | 38.3 | 12.9 | 39.5 | 12.4 | 39.4 | 12.0 | 40.4 | 11.5 | −0.0035 | 0.0009 | 13.5 | 1 | 0.0002 |
| Education (years) | 13.5 | 3.2 | 14.0 | 3.3 | 13.4 | 3.1 | 12.9 | 3.3 | 12.3 | 3.0 | 11.7 | 2.6 | 12.5 | 2.4 | −0.0362 | 0.0038 | 93.1 | 1 | <0.0001 |
| Monthly household incomeb | 2440 | 3191 | 2768 | 3735 | 2346 | 2569 | 2117 | 2582 | 1587 | 1788 | 1371 | 1744 | 1342 | 1323 | −0.0322 | 0.0049 | 42.6 | 1 | <0.0001 |
| Age at first episode | 25.3 | 14.3 | 27.0 | 15.0 | 24.2 | 13.5 | 22.6 | 13.2 | 22.7 | 12.3 | 22.6 | 12.5 | 21.6 | 12.4 | −0.0056 | 0.0009 | 38.6 | 1 | <0.0001 |
| Years since first episode | 15.1 | 13.1 | 14.7 | 13.5 | 14.6 | 12.4 | 15.6 | 12.8 | 17.0 | 12.9 | 16.9 | 12.7 | 18.8 | 12.8 | 0.0029 | 0.0009 | 9.4 | 1 | 0.0021 |
| N Episodes | 5.4 | 9.2 | 4.9 | 8.6 | 5.8 | 9.8 | 5.6 | 9.2 | 6.7 | 10.6 | 5.7 | 10.3 | 8.4 | 11.7 | 0.0038 | 0.0013 | 8.3 | 1 | 0.0040 |
| Months since index onset | 24.2 | 51.6 | 21.2 | 45.3 | 23.5 | 53.7 | 32.3 | 60.5 | 21.8 | 32.8 | 42.3 | 82.7 | 42.0 | 80.4 | 0.0009 | 0.0002 | 20.4 | 1 | <0.0001 |
| N Moderate to severe GMCsc | 1.0 | 1.3 | 1.0 | 1.3 | 1.0 | 1.2 | 1.0 | 1.3 | 1.2 | 1.4 | s1.5 | 1.5 | 1.6 | 1.3 | 0.0481 | 0.0093 | 26.6 | 1 | <0.0001 |
| HRSD17 | 19.9 | 6.5 | 17.9 | 6.1 | 20.3 | 6.0 | 22.5 | 5.9 | 23.4 | 6.0 | 26.8 | 5.5 | 28.2 | 4.1 | 0.0386 | 0.0019 | 410 | 1 | <0.0001 |
| IDS‐C30 | 35.5 | 11.5 | 31.7 | 10.6 | 36.5 | 10.4 | 40.4 | 10.4 | 42.7 | 10.2 | 47.8 | 10.1 | 50.8 | 7.1 | 0.0233 | 0.0011 | 467 | 1 | <0.0001 |
| QIDS‐SR16 | 15.4 | 4.3 | 14.1 | 4.1 | 15.8 | 4.0 | 17.4 | 3.6 | 17.9 | 3.9 | 19.0 | 3.6 | 19.8 | 3.6 | 0.0561 | 0.0030 | 361 | 1 | <0.0001 |
| Q‐LES‐Q | 41.8 | 15.2 | 45.6 | 14.2 | 40.6 | 14.2 | 37.5 | 14.8 | 32.5 | 14.7 | 30.9 | 16.7 | 27.4 | 15.6 | −0.0131 | 0.0008 | 246 | 1 | <0.0001 |
| SF12 Mental | 26.5 | 8.6 | 27.7 | 9.0 | 25.5 | 8.1 | 24.4 | 7.6 | 25.1 | 7.1 | 26.8 | 9.1 | 23.4 | 7.4 | −0.0092 | 0.0015 | 36.8 | 1 | <0.0001 |
| SF12 Physical | 49.8 | 11.8 | 51.5 | 11.6 | 50.0 | 11.4 | 48.1 | 11.4 | 44.4 | 11.7 | 41.7 | 12.0 | 40.0 | 10.4 | −0.0118 | 0.0010 | 127 | 1 | <0.0001 |
| WSAS | 23.4 | 9.3 | 21.0 | 9.1 | 24.3 | 8.9 | 26.4 | 8.2 | 29.2 | 7.7 | 29.5 | 8.5 | 30.9 | 7.8 | 0.0219 | 0.0014 | 235 | 1 | <0.0001 |
Note: GMC, general medical comorbidity; HRSD17, 17‐item Hamilton Rating Scale for Depression; IDS‐C30, 30‐item Inventory of Depressive Symptomatology – Clinician‐rated; QIDS‐SR16, 16‐item Quick Inventory of Depressive Symptomatology – Self‐rated; Q‐LES‐Q, Quality of Life and Enjoyment Satisfaction Questionnaire; SF12, 12‐item short‐form health survey; WSAS, Work and Social Adjustment Scale.
a
Assessed by the Psychiatric Diagnostic Screening Questionnaire.
b
Beta based on units of $1000.
c
Assessed by the Cumulative Illness Rating Scale.