The explanatory variable in this study was SPMH which was obtained using the following question: "In general, would you say your mental health is excellent, very good, good, fair or poor?
Bivariable multinomial logistic regression analyses were conducted to investigate the association between SPMH and FOBT uptake, and between each of the potential confounders (ie, gender, age, education, race, and immigration status) and FOBT uptake.
The total study sample (n = 11 386)--including 120 who had FOBT for family history of CRC--was unevenly distributed across SPMH with fewer respondents reporting fair (n = 588, 5.
In the unadjusted multinomial logistic regression model, higher odds of FOBT uptake was related to better SPMH for both FOBT uptake within two years and [greater than or equal to]2 years of the survey versus never had FOBT.
Since individuals may get a colonoscopy or sigmoidoscopy instead of FOBT for CRC screening, a sensitivity analysis was performed by further investigation of the association between SPMH and both regular and irregular testing for colonoscopy or sigmoidoscopy, which found no significant association.
The current study used a national representative survey of 11 386 individuals to evaluate the association of SPMH status with FOBT uptake for screening of CRC among Canadians aged 50 to 74 years.
33) The current study made use of all information and demonstrated that individuals with lower SPMH (poor or fair) were less likely to have ever had FOBT compared to those with higher perceived mental health (very good or excellent).
As discussed earlier, SPMH status and multi-items mental health screening scales (eg, K6, SF 12, PHQ-2) are associated but not interchangeable.