Not an equal opportunity disease – a sex and gender-based review of colorectal cancer in men and women: Part I

Proton pump inhibitors and risk of colorectal cancer

OBJECTIVE

To determine whether proton pump inhibitors (PPIs) are associated with an increased risk of colorectal cancer, compared with histamine-2 receptor antagonists (H2RAs).

DESIGN

The United Kingdom Clinical Practice Research Datalink was used to identify initiators of PPIs and H2RA from 1990 to 2018, with follow-up until 2019. Cox proportional hazards models were fit to estimate marginal HRs and 95% CIs of colorectal cancer. The models were weighted using standardised mortality ratio weights using calendar time-specific propensity scores. Prespecified secondary analyses assessed associations with cumulative duration, cumulative dose and time since treatment initiation. The number needed to harm was calculated at five and 10 years of follow-up.

RESULTS

The cohort included 1 293 749 and 292 387 initiators of PPIs and H2RAs, respectively, followed for a median duration of 4.9 years. While the use of PPIs was not associated with an overall increased risk of colorectal cancer (HR: 1.02, 95% CI 0.92 to 1.14), HRs increased with cumulative duration of PPI use (<2 years, HR: 0.93, 95% CI 0.83 to 1.04; 2-4 years, HR: 1.45, 95% CI 1.28 to 1.60; ≥4 years, HR: 1.60, 95% CI 1.42 to 1.80). Similar patterns were observed with cumulative dose and time since treatment initiation. The number needed to harm was 5343 and 792 for five and 10 years of follow-up, respectively.

CONCLUSION

While any use of PPIs was not associated with an increased risk of colorectal cancer compared with H2RAs, prolonged use may be associated with a modest increased risk of this malignancy.

A review of sex-related differences in colorectal cancer incidence, screening uptake, routes to diagnosis, cancer stage and survival in the UK

Background

Colorectal cancer (CRC) is an illness strongly influenced by sex and gender, with mortality rates in males significantly higher than females. There is still a dearth of understanding on where sex differences exist along the pathway from presentation to survival. The aim of this review is to identify where actions are needed to improve outcomes for both sexes, and to narrow the gap for CRC.

Methods

A cross-sectional review of national data was undertaken to identify sex differences in incidence, screening uptake, route to diagnosis, cancer stage at diagnosis and survival, and their influence in the sex differences in mortality.

Results

Overall incidence is higher in men, with an earlier age distribution, however, important sex differences exist in anatomical site. There were relatively small differences in screening uptake, route to diagnosis, cancer staging at diagnosis and survival. Screening uptake is higher in women under 69 years. Women are more likely to present as emergency cases, with more men diagnosed through screening and two-week-wait. No sex differences are seen in diagnosis for more advanced disease. Overall, age-standardised 5-year survival is similar between the sexes.

Conclusions

As there are minimal sex differences in the data from routes to diagnosis to survival, the higher mortality of colorectal cancer in men appears to be a result of exogenous and/or endogenous factors pre-diagnosis that lead to higher incidence rates. There are however, sex and gender differences that suggest more targeted interventions may facilitate prevention and earlier diagnosis in both men and women.

Predictors of Colorectal Cancer Survival in Golestan, Iran: A Population-based Study

OBJECTIVES

We aimed to investigate factors associated with colorectal cancer survival in Golestan, Iran.

METHODS

We used a population based cancer registry to recruit study subjects. All patients registered since 2004 were contacted and data were collected using structured questionnaires and trained interviewers. All the existing evidences to determine the stage of the cancer were also collected. The time from first diagnosis to death was compared in patients according to their stage of cancer using the Kaplan-Meir method. A Cox proportional hazard model was built to examine their survival experience by taking into account other covariates.

RESULTS

Out of a total of 345 subjects, 227 were traced. Median age of the subjects was 54 and more than 42% were under 50 years old. We found 132 deaths among these patients, 5 of which were non-colorectal related deaths. The median survival time for the entire cohort was 3.56 years. A borderline significant difference in survival experience was detected for ethnicity (log rank test, p=0.053). Using Cox proportional hazard modeling, only cancer stage remained significantly associated with time of death in the final model.

CONCLUSIONS

Colorectal cancer occurs at a younger age among people living in Golestan province. A very young age at presentation and what appears to be a high proportion of patients presenting with late stage in this area suggest this population might benefit substantially from early diagnoses by introducing age adapted screening programs.

I can't get my husband to go and have a colonoscopy: gender and screening for colorectal cancer

It is anticipated that a colorectal cancer (CRC) screening programme will be introduced in New Zealand making it the first screening programme in this country to include both males and females. In-depth interviews were carried out with 80 participants (53 females and 27 males) about their knowledge and attitudes to screening programmes in general, as well as their understanding and perceptions of CRC screening in particular. The study highlighted the perceived marginalization of men's health with a sense that women had advocated for, and therefore monopolized, screening while men's health had been left unattended. There were also perceptions of women's responsibility for ensuring men's access to health services. There are arguments that such perceptions disempower or 'infantalize' men which have no long term benefits. While health is perceived as being a feminine matter, it may be difficult to encourage men to engage in preventative behaviours, such as taking up the offer of screening. This article also highlights the heterogeneity of men, where different performances of masculinities were presented. A stereotypical 'staunch' or 'macho image' discourse was evident in some of the interviews where much emphasis was on maintaining and controlling bodily boundaries. Letting the barrier of embodied 'staunchness' down to access health services is a threat to identity. What is required for successful implementation of the CRC screening programme is a normalization of men's health help-seeking, taking into account the fact that men are not homogenous. Studies in relation to men's health need to attend to cultural diversity which is likely to present a challenge to individualism. Critical studies of men would be enhanced by more engagement with the work of black male scholars.

'Getting through' not 'going under': a qualitative study of gender and spousal support after diagnosis with colorectal cancer

Many studies have found that people with cancer value family support. Feminist work suggests that women carry most responsibility for practical and emotional support in families, but few qualitative cancer studies explicitly incorporate a gender perspective. We undertook secondary analysis of in-depth interviews with 33 married or cohabiting respondents with colorectal cancer in the UK to compare men and women's accounts of 'spousal' support. Both men and women described the vital role that their partners played in providing emotional and practical support. Mutual support and reciprocity were also key features of narratives; both men and women reported controlling their emotions to protect spouses and preserve 'normal' household routines. Traditional gender roles had some influence; some women organised 'cover' for domestic work and childcare when they were ill, while some men focused on making sure that their families were financially secure and partners were 'protected' from the effects of their stomas. Our findings illustrate the complexity of gendered constructions and performances of 'care' and contribute to debates about gender and emotional labour.