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Comparative Study
. 2013 Jul 1;119(13):2469-76.
doi: 10.1002/cncr.28091. Epub 2013 Apr 12.

Analyzing excess mortality from cancer among individuals with mental illness

Affiliations
Comparative Study

Analyzing excess mortality from cancer among individuals with mental illness

Jackson S Musuuza et al. Cancer. .

Abstract

Background: The objective was to compare patterns of site-specific cancer mortality in a population of individuals with and without mental illness.

Methods: This was a cross-sectional, population-based study using a linked data set comprised of death certificate data for the state of Ohio for the years 2004-2007 and data from the publicly funded mental health system in Ohio. Decedents with mental illness were those identified concomitantly in both data sets. We used age-adjusted standardized mortality ratios (SMRs) in race- and sex-specific person-year strata to estimate excess deaths for each of the anatomic cancer sites.

Results: Overall, there was excess mortality from cancer associated with having mental illness in all the race/sex strata: SMR, 2.16 (95% CI, 1.85-2.50) for black men; 2.63 (2.31-2.98) for black women; 3.89 (3.61-4.19) for nonblack men; and 3.34 (3.13-3.57) for nonblack women. In all the race/sex strata except for black women, the highest SMR was observed for laryngeal cancer, 3.94 (1.45-8.75) in black men and 6.51 (3.86-10.35) and 6.87 (3.01-13.60) in nonblack men and women, respectively. The next highest SMRs were noted for hepatobiliary cancer and cancer of the urinary tract in all race/sex strata, except for black men.

Conclusions: Compared with the general population in Ohio, individuals with mental illness experienced excess mortality from most cancers, possibly explained by a higher prevalence of smoking, substance abuse, and chronic hepatitis B or C infections in individuals with mental illness. Excess mortality could also reflect late-stage diagnosis and receipt of inadequate treatment.

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Figures

Figure 1
Figure 1
Age-Adjusted Standardized Mortality Rates (SMR) by race/sex categories Footnote for Figures 1A–D: - The number in parentheses indicates the observed number of observed deaths in that race/sex stratum, and for that cancer site. - White bars are for SMRs that were not statistically significant at p < 0.05. All remaining SMRs were significant at p < 0.05.
Figure 1
Figure 1
Age-Adjusted Standardized Mortality Rates (SMR) by race/sex categories Footnote for Figures 1A–D: - The number in parentheses indicates the observed number of observed deaths in that race/sex stratum, and for that cancer site. - White bars are for SMRs that were not statistically significant at p < 0.05. All remaining SMRs were significant at p < 0.05.
Figure 1
Figure 1
Age-Adjusted Standardized Mortality Rates (SMR) by race/sex categories Footnote for Figures 1A–D: - The number in parentheses indicates the observed number of observed deaths in that race/sex stratum, and for that cancer site. - White bars are for SMRs that were not statistically significant at p < 0.05. All remaining SMRs were significant at p < 0.05.
Figure 1
Figure 1
Age-Adjusted Standardized Mortality Rates (SMR) by race/sex categories Footnote for Figures 1A–D: - The number in parentheses indicates the observed number of observed deaths in that race/sex stratum, and for that cancer site. - White bars are for SMRs that were not statistically significant at p < 0.05. All remaining SMRs were significant at p < 0.05.

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