Table 3.
Nonreceipt of Treatment of Participants with Colon Cancer with and without Preexisting Mental Disorders
| Risk Factor | No Treatment (All Stages, n =61,942)
|
No Chemotherapy (Stage 3, n =15,319)
|
||||
|---|---|---|---|---|---|---|
| % | Unadjusted RR | Adjusted RR | % | Unadjusted RR | Adjusted RR | |
| No mental disorder | 2.6 | Reference | Reference | 38.7 | Reference | Reference |
|
| ||||||
| Any mental disorder | 6.8 | 2.76 (2.52–3.01) | 2.09 (1.86–2.35) | 54.6 | 1.88 (1.74–2.04) | 1.63 (1.49–1.79) |
|
| ||||||
| Mood disorder | 6.5 | 1.22 (1.07–1.39) | 1.28 (1.08–1.52) | 55.0 | 1.36 (1.21–1.54) | 1.27 (1.10–1.46) |
|
| ||||||
| Psychotic disorder | 12.2 | 1.71 (1.45–2.02) | 1.42 (1.13–1.78) | 72.9 | 1.91 (1.51–2.43) | 1.56 (1.21–2.03) |
|
| ||||||
| Dementia | 13.3 | 4.03 (3.56–4.56) | 2.47 (2.08–2.93) | 78.9 | 4.42 (3.71–5.27) | 3.23 (2.66–3.91) |
|
| ||||||
| Substance abuse disorder | 4.9 | 1.08 (0.89–1.32) | 1.21 (0.94–1.56) | 43.6 | 0.88 (0.73–1.01) | 1.15 (0.94–1.41) |
|
| ||||||
| Other mental disorder | 6.3 | 1.21 (1.07–1.37) | 1.28 (1.05–1.55) | 51.4 | 1.12 (0.99–1.25) | 1.03 (0.90–1.76) |
Associations between preexisting mental disorders and no treatment (all stages) and no chemotherapy (Stage 3 only) were estimated using logistic regression models that adjusted for age; race and ethnicity; sex; marital status; Surveillance, Epidemiology, and End Results region; income; comorbidity; year of diagnosis; and stage (for no-treatment model only).
Analyses were restricted to patients who remained alive and enrolled in Medicare at least 6 months after their date of diagnosis.
RR =risk ratio.