Information sources and examine inhabitants
Information for this examine have been obtained from the 2019 Korean Nationwide Most cancers Screening Survey (KNCSS), an annual, nationwide, population-based cross-sectional survey performed since 2004 to find out most cancers screening charges among the many Korean inhabitants22. The survey contributors have been randomly chosen by way of a multi-stage random sampling methodology that was stratified by geographic space, intercourse, and age. The sampling body was based mostly on resident registration inhabitants knowledge. Particulars in regards to the sampling process can be found elsewhere22,23.
An expert analysis company performed face-to-face interviews utilizing a structured questionnaire. They recruited examine topics by way of door-to-door visits at the least thrice to make sure that all eligible contributors (i.e., males aged 40–74 years and females aged 20–74 years with no historical past of most cancers) had a chance to take part. All examine contributors have been supplied with a enough clarification, they usually supplied knowledgeable consent to take part within the survey.
Within the 2019 KNCSS, contributors have been requested about their screening historical past for 5 varieties of cancers (abdomen, liver, colorectal, breast, and cervical most cancers), well being behaviors, well being standing, household historical past of most cancers, and demographic traits. Of the 4500 respondents, 3539 adults aged 40–74 years have been eligible for abdomen most cancers screening and included on this examine (Fig. 1).
Measures
Way of life threat components
We investigated six life-style threat components based mostly on prior data of threat components for abdomen most cancers and public well being suggestions6,8,9,10,11.
Ever smoking
Individuals have been requested in regards to the whole variety of cigarettes that that they had smoked of their total life (pre-defined classes: “none,” “lower than 100 cigarettes,” and “100 cigarettes or extra”). We outlined ever people who smoke as those that have smoked at the least 100 cigarettes all through their lifetime24.
Heavy ingesting
Individuals answered a collection of questions relating to their frequency of alcohol consumption up to now yr (“none,” “lower than as soon as per 30 days,” “as soon as a month,” “2–4 occasions per 30 days,” “2–3 occasions per week,” and “4 or extra occasions per week”) and the variety of commonplace drinks (cups) consumed per every ingesting session. An ordinary drink was outlined as a specialised cup for every sort of alcoholic beverage (i.e., beer, beer glass; soju, soju shot glass; western liquor, liquor glass; and rice wine, bowl). Every cup has a unique quantity however the same quantity of alcohol (~ 8 g of pure alcohol)25,26. The full day by day alcohol consumption quantity (g/day) was calculated by multiplying the day by day consumption frequency with the quantity of alcohol per time. Primarily based on the affiliation between alcohol consumption and the danger of abdomen most cancers in a earlier examine among the many Korean inhabitants27, heavy ingesting was outlined as consuming ≥ 20 g/day for females or ≥ 40 g/day for males.
Bodily inactivity
Topics have been requested in regards to the variety of days that they had at the least 10 min of moderate-to-vigorous-intensity bodily exercise over the last week and the variety of minutes per day. Reasonable-to-vigorous-intensity bodily actions embody climbing, swimming, shoveling, bicycling quick, basketball sport, tennis singles, and so forth. Data on the full variety of minutes per day and the variety of days per week was used to calculate the full minutes per week. Individuals who didn’t carry out at the least 75 min of moderate-to-vigorous-intensity bodily exercise per week have been outlined as having “bodily inactivity” based mostly on the advice of the World Well being Group (WHO)28.
Chubby or weight problems
Primarily based on self-reported top and weight knowledge and utilizing a typical method for calculating physique mass index (BMI, weight [kg]/top squared [m2]), people with a BMI of ≥ 25 kg/m2 have been outlined as chubby or overweight, based mostly on the usual for the final inhabitants recommended by the WHO29.
Excessive purple or processed meat consumption
We equated 100 g of purple and processed meat (together with beef, pork, lamb, ham, sausage, bacon, and different processed meats) to 1 serving and requested contributors in regards to the frequency of purple and processed meat consumption per week. The frequency was categorized into three classes: “one serving per week,” “two to 3 servings per week,” and “4 or extra servings per week.” People who reported consuming 4 or extra servings per week have been denoted as reporting excessive purple or processed meat consumption.
Excessive salted meals consumption
We requested contributors about how a lot they like salty taste utilizing a 5-point Likert scale: (1) “like very a lot (very salty),” (2) “like (salty),” (3) “neither like nor dislike (impartial),” (4) “dislike (average),” and (5) “dislike very a lot (mild).” People who reported “like (salty)” or “like very a lot (very salty)” have been denoted as consuming a excessive degree of choice for salty taste.
Abdomen most cancers screening standing
Individuals have been requested a collection of questions relating to their abdomen most cancers screening historical past. The questions have been as follows: “Have you ever ever undergone a UGIS or endoscopy for abdomen most cancers screening?” “Which screening methodology did you bear?” and “When did you final bear abdomen most cancers screening with this methodology?”. Primarily based on the responses, we outlined sufferers as adherent to abdomen most cancers screening if that they had undergone both a UGIS or endoscopy throughout the final two years, in accordance with the rules of the Korean Nationwide Most cancers Screening Program30.
Demographic and health-related components
All contributors supplied detailed demographic info, together with intercourse, age, training degree, month-to-month family revenue, and residential space, in addition to their health-related standing, together with their self-perceived well being standing (good/impartial/dangerous), comorbidities (having any of the next circumstances: hypertension, diabetes, tuberculosis, hepatitis B/C, liver cirrhosis, gastritis, ulcer, colon polyps, benign breast illness, uterine fibroids, hyperlipidemia), and household historical past of most cancers.
Statistical evaluation
The frequency and share have been used to current the demographic traits of the examine inhabitants, abdomen most cancers screening standing, and 6 life-style threat components. Chi-squared exams have been performed to find out a distinction between two categorical variables. We assigned a binary rating (1: sure and 0: no) for every threat issue and estimated the variety of threat components by summing all threat components reported by every participant (giving a worth from 0 to six). To explain the combos of every cluster, we used upset diagrams31, which visualize complicated intersections of a life-style threat issue matrix through which the rows signify completely different units of combos, and the columns signify the share of contributors having these combos.
A number of logistic regression evaluation was performed to look at the affiliation between adherence to abdomen most cancers screening and life-style threat components adjusted for demographic and health-related components. The result was adherence to abdomen most cancers screening (sure/no), and the unbiased variables have been the six threat components or a number of life-style threat components, categorized into 4 teams: 0, 1, 2, and three + threat components. The adjusted odds ratio [aOR] and 95% confidence interval [CI] have been offered, and the dose–response relationship was examined utilizing a linear pattern. Moreover, we carried out multinomial logistic regressions to find out the affiliation between adherence to abdomen most cancers screening in keeping with screening modality and life-style threat components. The chances of getting undergone a UGIS or endoscopy was estimated in contrast with that of not having undergone both process. Statistical significance was set at a p worth < 0.05. All analyses have been carried out utilizing STATA software program model 17 (StataCorp, Faculty Station, TX, USA).
Moral issues
All people who enrolled within the 2019 KNCSS supplied written knowledgeable consent. The examine was authorized by the Institutional Evaluation Board of the Nationwide Most cancers Middle, Korea (approval quantity: NCC-2019-0233). This examine was performed in accordance with the ideas of the Declaration of Helsinki and the Moral Tips for Medical and Organic Analysis Involving Human Topics.
