Higher incidence of screening-related cancers in the employed population

The association between occupational asbestos exposure with the risk of incidence and mortality from prostate cancer: a systematic review and meta-analysis

BACKGROUND

There is conflicting evidence on the association between asbestos exposure and prostate cancer (PCa). Two recent meta-analyses have claimed that exposure is associated with increased PCa incidence and mortality, but they suffer from some methodological flaws. Given the potential importance of this research question, we aimed to perform a methodologically sound systematic review and meta-analysis to investigate the association between occupational asbestos exposure and the incidence of and mortality from PCa.

METHODS

We followed PRISMA guidelines to systematically search for pertinent articles in three relevant electronic databases: Pubmed, Scopus, and Embase, from their inception to July 2020. The methodological quality of included articles was evaluated using the US National Institutes of Health tool. Standardized incidence ratios (SIRs) and standardized mortality ratios (SMRs) for PCa, as well as respective 95% confidence intervals (CIs), were extracted or calculated for each included cohort. Main and subgroup meta-analyses according to first year of employment, industry, asbestos type, and geographic region were performed.

RESULTS

Sixty-five articles comprising 68 cohorts were included. PCa incidence and mortality were not significantly associated with occupational asbestos exposure (pooled SIR: 1.06, 95% CI: 1.00-1.13, P = 0.062; pooled SMR: 1.03, 95% CI: 0.99-1.06, P = 0.115). PCa incidence was higher among workers employed after 1960 (SIR: 1.10, 95% CI: 1.01-1.20). Pooled SIR was elevated in European (SIR: 1.09, 95% CI: 1.01-1.18) and UK cohorts (SIR: 1.05, 95% CI: 1.02-1.09). Mortality was elevated in North American cohorts (SMR: 1.06, 95% CI: 1.02-1.10). Studies of lower methodological quality appeared to yield elevated SIRs or SMRs.

CONCLUSIONS

This systematic review and meta-analysis provides evidence that men with occupational asbestos exposure have a PCa incidence and mortality similar to that of the general population. Temporal and geographical variables seem to be related to higher SMR or SIR.

Unemployment following breast cancer diagnosis: A population-based study

OBJECTIVES

The population of breast cancer survivors is growing. In Western societies, many of these women are working age, and therefore, potentially desire to return to the work force. We aimed to evaluate the unemployment risk for up to 8 years following a breast cancer diagnosis and identify contributing socio-economic factors.

METHODS

This historical prospective study included baseline measurements from the Israeli Central Bureau of Statistics 1995 National Census, with follow-up to 2011. We retrieved data on employment from the Israeli Tax Authority database and cancer status from the National Cancer Registry. A control group without cancer was selected to match the patients. Analyses were controlled for socio-economic factors and the baseline employment status 2 years prior to diagnosis.

RESULTS

We retrieved data for 2341 patients with breast cancer and 6837 age-matched women without cancer. We found an elevated risk of unemployment during the 8 years after breast cancer diagnosis (2-year OR 1.82, 95%CI: 1.59-2.075; 8-year OR 1.26, 95%CI: 1.07-1.47). Age and all examined socio-economic variables were correlated to increased risk of unemployment. The strongest predictor was pre-diagnosis unemployment (2-year OR 18.95, 95%CI: 16.68-21.52; 8-year OR 4.92, 95%CI: 4.07-5.96). Surprisingly, patients with axillary involvement were associated with less risk of unemployment than other patients.

CONCLUSIONS

Breast cancer survivorship was associated with long-term risk of unemployment. Older patients and patients with lower socio-economic status were at increased risk of unemployment.