Meta-Analysis of Incidence and Mortality of Firefighter Cancer: An Update on Emerging Science

BACKGROUND

Firefighters are faced with a broad range of toxic exposures during their work, including known and suspected carcinogens. The current study is an update to the previously published meta-analysis of cancer risk among firefighters by Soteriades and colleagues, and focuses on studies published from 2008 to 2020.

METHODS

A comprehensive search of the literature was conducted, including electronic databases and bibliographies of recently published papers. Analyses include stratification of studies conducted in the United States (US) versus other countries. Cancer incidence and mortality rates were compared to the relevant general population. Random effects models were used to calculate summary risk estimates and their 95% confidence intervals.

RESULTS

A total of 24 studies were included in the meta-analysis. Among the 42 cancer types covered, incidence was associated with firefighting in US samples for colon, kidney, large intestine, pleura, and prostate cancer, as well as malignant melanoma. There was an increased incidence of Hodgkin's Disease and malignant melanoma and a significantly lower risk of kidney cancer for non-US samples. Significant cancer mortality estimates for US samples included oral/buccal/mouth, other parts of the buccal cavity, pharynx, colon, esophagus, large intestine, lung, Non-Hodgkin's Lymphoma, pancreas, pleura, rectum, and soft tissue sarcoma. No cancer had a significantly higher rate of mortality among non-US samples.

CONCLUSIONS

The findings underscore the global cancer burden among firefighters, and indicate that geographically stratifying studies afford a more nuanced risk perspective. Further research should investigate why US firefighters exhibit higher cancer mortality rates compared to international counterparts.

SNAP Participation Moderates Fruit and Vegetable Intake Among Minority Families With Low Income

OBJECTIVE

To examine the moderation effect of Supplemental Nutrition Assistance Program (SNAP) participation on the baseline fruit and vegetable (FV) intake of Hispanic/Latino and African American children and parents participating in the Brighter Bites program.

DESIGN

Cross-sectional.

SETTING

Houston, Austin, and Dallas, TX; Washington, DC; and Southwest Florida.

PARTICIPANTS

Self-reported surveys (n = 6,037) of Hispanic/Latino and African American adult-child dyads enrolled in Brighter Bites in Fall 2018.

VARIABLES MEASURED

Dependent variable, child FV intake; Independent variable, parent FV intake, and FV shopping behavior; Effect Measure Modifier, SNAP participation.

ANALYSIS

Quantitatively used mixed effects linear regression models to test if the effect of parental baseline FV intake and shopping behavior on a child's baseline FV intake differed by SNAP participation. Analyses were performed using STATA with significance set at P < 0.05 and 95% confidence intervals (CIs).

RESULTS

For parents that consumed FV ≥ 2 times/d at baseline, there was a 0.1 times increase in child FV intake at baseline among those who participated in SNAP as compared with those who did not participate in SNAP (ß = 0.1; 95% CI, 0.1-0.2; P = 0.001), and for parents who shopped at convenience stores ≥ 2 times/wk for FV, there was 0.6 times increase in child FV intake at baseline for those who participated in SNAP as compared with those that did not participate in SNAP (ß = 0.6; 95% CI, 0.3-0.9; P < 0.001).

CONCLUSIONS AND IMPLICATIONS

Supplemental Nutrition Assistance Program participation moderated the associations between FV intake among African American and Hispanic/Latino parents and children and FV shopping at convenience stores and child FV intake. Findings indicate a need for future interventions to promote SNAP participation among those eligible and improve access to FV.

Fruit and Vegetable Intake and Home Nutrition Environment among Low-Income Minority Households with Elementary-Aged Children

Racial/ethnic and socioeconomic differences were shown to have an influence on child fruit and vegetable intake. This study examined the associations between parent and child fruit and vegetable intake and the home nutrition environment among Hispanic/Latino and African American families. Through a cross-sectional study design, self-reported surveys (n = 6074) were obtained from adult-child dyad participants enrolled in Brighter Bites, an evidence-based health promotion program, in the fall of 2018. For every once/day increase in frequency of parent FV intake, there was an increase in child FV intake by 0.701 times/day (CI: 0.650, 0.751, p < 0.001) and 0.916 times/day (CI: 0.762, 1.07; p < 0.001) among Hispanic/Latinos and African Americans, respectively. In Hispanic/Latino participants, significant positive associations were found between fruits as well as vegetables served at mealtimes ≥3 times/week (p < 0.001), family mealtimes 7 times/week (p = 0.018), parent-child communication about healthy eating and nutrition at least sometimes during the past 6 months (p < 0.05), and frequency of child FV intake, after adjusting for covariates. In African American participants, a significant positive association was found in fruits served at mealtimes ≥1 times/week (p < 0.05), and vegetables served at mealtimes ≥5 times/week (p < 0.05). Meals cooked from scratch a few times a day/all the time were significantly positively associated with frequency of child FV intake for both Hispanic/Latino (p = 0.017) and African American (p = 0.007) groups. The relationship between home nutrition environment and child FV intake varied by race and ethnicity. Future programs should consider designing culturally tailored interventions to address racial/ethnic-specific influences that match the child's race, culture, and ethnicity.