Table 4.
Variations in associations between mental disorders and chronic back or neck pain by lifecourse timing of chronic back or neck pain onset.
| Type of Mental Disorders | Mental disorder*Person-year interaction1 | Stratified Models2 |
|||||
|---|---|---|---|---|---|---|---|
| Up to Age 24 | Age 25-35 | Age 36-47 | Age 48+ | ||||
| OR (95% C.I.) | χ21 | [p] | OR (95% C.I.) | OR (95% C.I.) | OR (95% C.I.) | OR (95% C.I.) | |
| Major Depressive Episode/ Dysthymia | 0.98* (0.98-0.98) | 87.7* | [0.000] | 1.8* (1.6-2.0) | 1.4* (1.2-1.5) | 1.3* (1.2-1.5) | 1.3* (1.1-1.5) |
| Bipolar Disorder (Broad) | 0.98* (0.97-0.99) | 11.8* | [0.001] | 1.3* (1.0-1.7) | 1.0 (0.7-1.4) | 1.0 (0.6-1.4) | 1.5 (0.9-2.4) |
| Panic Disorder | 0.97* (0.96-0.98) | 37.3* | [0.000] | 1.4* (1.1-1.8) | 1.5* (1.2-1.9) | 1.2 (0.9-1.5) | 0.9 (0.6-1.3) |
| Generalized Anxiety Disorder | 0.98* (0.97-0.99) | 23.5* | [0.000] | 1.4* (1.1-1.7) | 1.2* (1.0-1.5) | 1.7* (1.4-2.1) | 1.5* (1.2-1.9) |
| Social Phobia | 0.98* (0.97-0.98) | 68.4* | [0.000] | 1.3* (1.1-1.5) | 1.3* (1.1-1.5) | 1.0 (0.9-1.3) | 0.9 (0.7-1.2) |
| Specific Phobia | 0.99* (0.99-1.00) | 16.4* | [0.000] | 1.4* (1.3-1.6) | 1.5* (1.3-1.7) | 1.5* (1.3-1.7) | 1.5* (1.2-1.9) |
| Post-Traumatic Stress Disorder | 0.98* (0.97-0.99) | 21.6* | [0.000] | 1.2 (1.0-1.5) | 1.4* (1.1-1.8) | 1.3* (1.0-1.7) | 1.2 (0.9-1.6) |
| Intermittent Explosive Disorder | 0.99* (0.97-1.00) | 7.8* | [0.005] | 1.5* (1.2-1.9) | 1.5* (1.2-1.9) | 1.3 (0.9-1.8) | 1.5 (0.9-2.3) |
| Alcohol Abuse | 0.97* (0.96-0.98) | 59.0* | [0.000] | 1.4* (1.1-1.7) | 1.3* (1.1-1.6) | 1.3* (1.0-1.7) | 1.0 (0.7-1.3) |
| Alcohol Dependence with Abuse | 0.98* (0.96-0.99) | 11.7* | [0.001] | 1.0 (0.8-1.4) | 1.0 (0.7-1.4) | 1.0 (0.7-1.4) | 1.5 (1.0-2.5) |
| Drug Abuse | 0.97* (0.95-0.99) | 13.2* | [0.000] | 1.3 (1.0-1.8) | 1.1 (0.8-1.4) | 1.7* (1.1-2.4) | 2.1* (1.2-3.7) |
| Drug Dependence with Abuse | 0.96* (0.93-0.98) | 11.1* | [0.001] | 0.8 (0.6-1.2) | 0.9 (0.6-1.3) | 0.6 (0.3-1.1) | 0.2* (0.1-0.9) |
*
OR significant at the 0.05 level, 2-sided test
1
A series of multivariate models were estimated. For example, the model for depression included the dummy variables for all mental disorders plus the cross-product term for depression and person-year (as a continuous variable), plus the controls specified for earlier models.
2
The multivariate model was estimated in the four person-year datasets corresponding to quartiles of the chronic back or neck pain onset distribution.