Is it disgusting or am I just easily disgusted? The relation between situational disgust, dispositional disgust, and colonoscopy intentions

Assessing Fear, Embarrassment, and Disgust in Colonoscopy: The Development of Measurement Instruments and Psychometric Evidence

BACKGROUND

Avoidance of colonoscopy is often associated with fear, embarrassment, and disgust aroused in screening procedures. However, each emotion can be linked to different challenges faced by patients. More research is needed to evaluate and address the causes of these respective emotions.

AIM

The purpose of this study was to develop and assess the scales of three negative emotions (i.e., fear, embarrassment, and disgust) caused by specific issues in colonoscopy screening.

METHOD

The measurement items were developed based on multiple common barriers in colonoscopy screening procedures. An online sample of 232 adults aged 45-75 was recruited from Amazon Mechanical Turk to test the scales. Explorative and confirmatory factor analyses were conducted to validate the measurement models.

RESULTS

Psychometric evidence demonstrated the factor structures of three negative emotions. Each emotional factor was caused by unique combinations of barriers in the preparation, screening, and recovery stages of colonoscopy. Most of the emotional factors were associated with attitudes and screening intention.

CONCLUSION

This study showed different dimensions of negative emotions and their underlying causes in colonoscopy. These findings will help assess specific causes of negative emotions in colonoscopy and develop effective interventions to improve screening uptake.

Psychosocial Predictors of Colorectal Cancer Screening Intention: An Experiment on the Invitation Letter

BACKGROUND

In Italy, attendance rates for colorectal cancer (CRC) screening are suboptimal. The present work analysed cognitive and emotional predictors of CRC screening intention and tested an intervention on a real invitation letter to improve CRC screening intention, both directly and in interaction with the predictors of our model.

METHODS

Our model included variables from the theory of planned behaviour and the emotional barriers to bowel screening scale. We applied six changes to an invitation letter used in Italy to avoid the repetition of words like 'faeces', 'blood', or 'occult' and reduce the prompting of disgust. The 228 participants were randomly assigned to a between-participants design (original letter vs. manipulated letter).

RESULTS

Disgust hindered CRC screening intention, while embarrassment, fear, and subjective norms (i.e., perception of the social pressures to attend CRC screening) were not associated with intention to screen. More positive attitudes towards CRC screening were associated with a higher intention to screen. The positive association between perceived behavioural control and CRC screening intention was stronger for participants who read the letter with fewer (vs. more) references to bodily waste. Letter manipulation did not affect intention to screen.

CONCLUSIONS

The disgust associated with faecal matter is a critical factor in determining CRC screening attendance, and it should be acknowledged as such in public policies. Until new screening tests avoiding the activation of this emotional reaction are concretely available, public campaigns should improve CRC screening participation by boosting both positive attitudes towards screening and patients' perceived behavioural control.