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1Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
2Center for Disease Control and Prevention in Inner Mongolia, Hohhot, China
3National Institute of Health Data Science, Peking University, Beijing, China
4Research Center of Clinical Epidemiology, Peking University Third Hospital, Beijing, China
© 2023, Korean Society of Epidemiology
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
CONFLICT OF INTEREST
The authors have no conflicts of interest to declare for this study
FUNDING
The project is supported by the Natural Science Foundation of Inner Mongolia Autonomous Region, China (2021MS08039).
AUTHOR CONTRIBUTIONS
Conceptualization: Yu Y, Xi Y, Wang S. Data curation: Yu Y, Qiao L, Kang W, Shang S. Formal analysis: Yu Y, Han J, Wang W. Funding acquisition: Zhan S, Xi Y, Wang S. Methodology: Yu Y, Qiao L, Xi Y, Wang S. Project administration: Qiao L, Han J, Kang W, Zhang Y, Shang S, Xi Y. Visualization: Yu Y. Writing – original draft: Yu Y, Xi Y, Wang S. Writing – review & editing: Yu Y, Qiao L, Han J, Wang W, Kang W, Zhang Y, Shang S, Meng R, Zhuo L, Zhan S, Xi Y, Wang S.
Characteristics | Han ethnicity | Mongolian ethnicity | p-value | ||
---|---|---|---|---|---|
No. of participants at first-wave baseline | 60,380 (88.3) | 7,969 (11.7) | |||
Age at first wave, mean±SD (yr) | 55.77±9.07 | 54.19±8.53 | <0.001 | ||
Sex | <0.001 | ||||
Male | 28,529 (47.2) | 3,103 (38.9) | |||
Female | 31,851 (52.7) | 4,866 (61.1) | |||
Education | <0.001 | ||||
Junior high school or lower | 32,839 (54.4) | 3,368 (42.3) | |||
Senior high school or higher | 27,541 (45.6) | 4,601 (57.7) | |||
Martial status | <0.001 | ||||
Currently single | 1,653 (2.7) | 282 (3.5) | |||
Currently married | 58,727 (97.3) | 7,687 (96.5) | |||
Equipped with household heating | <0.001 | ||||
Yes | 58,720 (97.2) | 7,874 (98.8) | |||
No | 1,660 (2.7) | 95 (1.2) | |||
Type of household heating fuels | <0.001 | ||||
Cleaner fuels | 55,158 (93.9) | 7,083 (89.9) | |||
Coal | 3,532 (6.0) | 784 (10.0) | |||
Others | 30 (0.0) | 7 (0.1) | |||
Type of household cooking fuels | <0.001 | ||||
Cleaner fuels | 58,482 (96.9) | 7,632 (95.8) | |||
Coal | 1,734 (2.9) | 310 (3.9) | |||
Others | 164 (0.3) | 27 (0.3) | |||
Dietary habits2,3 | |||||
Average consumption (/wk) of fresh vegetables | <0.001 | ||||
Never | 3,179 (5.3) | 268 (3.4) | |||
Not much | 41,600 (68.9) | 5,348 (67.1) | |||
Meet the recommended amount | 15,601 (25.8) | 2,353 (29.5) | |||
Average consumption (/wk) of fresh fruits | <0.001 | ||||
Never | 3,873 (6.4) | 444 (5.6) | |||
Not much | 42,466 (70.3) | 5,385 (67.6) | |||
Meet the recommended amount | 14,041 (23.2) | 2,140 (26.8) | |||
Average consumption (/wk) of red meat | <0.001 | ||||
Never | 2,521 (4.2) | 191 (2.4) | |||
Not much | 39,260 (65.0) | 4,709 (59.1) | |||
Meet the recommended amount | 18,599 (30.8) | 3,069 (38.5) | |||
Average consumption (/wk) of coarse grains | <0.001 | ||||
Never | 5,108 (8.5) | 817 (10.2) | |||
Not much | 41,799 (69.2) | 5,288 (66.4) | |||
Meet the recommended amount | 13,473 (22.3) | 1,864 (23.4) | |||
Preference for food temperature | <0.001 | ||||
Hot | 12,594 (20.9) | 2,123 (26.6) | |||
Moderate | 46,105 (76.4) | 5,624 (70.6) | |||
Cold | 1,681 (2.8) | 222 (2.8) | |||
Preference for food flavor | <0.001 | ||||
Salty | 14,053 (23.3) | 2,561 (32.1) | |||
Moderate | 41,927 (69.4) | 4,686 (58.8) | |||
Plain (light seasoning) | 4,400 (7.3) | 722 (9.1) | |||
Preference for fat and oil content | <0.001 | ||||
High | 14,147 (23.4) | 2,450 (30.7) | |||
Moderate | 42,282 (70.0) | 4,836 (60.7) | |||
Little | 3,951 (6.5) | 683 (8.6) | |||
Smoking status | <0.001 | ||||
Never | 46,071 (76.3) | 5,696 (71.5) | |||
Ex-smoker | 1,554 (2.6) | 272 (3.4) | |||
Current smoker | 12,755 (21.1) | 2,001 (25.1) | |||
Alcohol consumption | <0.001 | ||||
Never | 46,324 (76.7) | 5,481 (68.8) | |||
Ex-drinker | 1,087 (1.8) | 220 (2.8) | |||
Current drinker | 12,969 (21.5) | 2,268 (28.5) | |||
Tea consumption | <0.001 | ||||
Never | 40,071 (66.4) | 4,472 (56.1) | |||
Not often | 1,525 (2.5) | 278 (3.5) | |||
Regular | 18,784 (31.1) | 3,219 (40.4) | |||
Having regular physical exercises | 22,605 (37.4) | 3,070 (38.5) | 0.061 | ||
Body mass index, mean±SD (kg/m2) | 24.02±2.79 | 24.54±3.13 | <0.001 | ||
Self-reported prevalence of chronic diseases | |||||
Chronic respiratory diseases | 14,345 (23.8) | 2,389 (30.0) | <0.001 | ||
Tuberculosis | 1,781 (12.4) | 319 (13.4) | 0.205 | ||
Chronic bronchitis | 12,734 (88.8) | 2,136 (89.4) | 0.380 | ||
Emphysema | 3,549 (24.7) | 243 (10.2) | <0.001 | ||
Asthma | 5,503 (38.4) | 769 (32.2) | <0.001 | ||
Upper gastrointestinal diseases | 11,491 (19.0) | 2,080 (26.1) | <0.001 | ||
Gastroesophageal reflux | 2,972 (25.9) | 586 (28.2) | 0.028 | ||
Superficial gastritis | 9,365 (81.5) | 1,746 (84.0) | 0.007 | ||
Atrophic gastritis | 2,795 (24.3) | 380 (18.3) | <0.001 | ||
Gastric ulcers | 4,629 (40.3) | 831 (40.0) | 0.808 | ||
Duodenal ulcers | 2,322 (20.2) | 370 (17.8) | 0.011 | ||
Gastric polyposis | 1,916 (16.7) | 258 (12.4) | <0.001 | ||
Lower gastrointestinal diseases | 7,787 (12.9) | 1,379 (17.3) | <0.001 | ||
Intestinal polyposis | 2,796 (37.6) | 392 (30.6) | <0.001 | ||
Ulcerative colitis and Crohn's disease | 6,470 (87.0) | 1,152 (89.9) | 0.004 | ||
Hepatobiliary diseases | 14,980 (25.0) | 2,537 (32.3) | <0.001 | ||
Fatty liver | 13,589 (89.6) | 2,316 (88.3) | 0.046 | ||
Gallstone | 6,857 (45.2) | 1,264 (48.1) | 0.006 | ||
Chronic hepatitis B | 1,086 (7.2) | 211 (8.1) | 0.095 | ||
Chronic hepatitis C | 788 (5.2) | 130 (5.0) | 0.702 | ||
Liver cirrhosis | 3,085 (20.4) | 224 (8.6) | <0.001 | ||
Cardiovascular and metabolic diseases | |||||
Hypertension | 7,991 (67.9) | 1,722 (69.4) | 0.142 | ||
Diabetes mellitus | 2,465 (20.9) | 511 (20.6) | 0.724 | ||
Hyperlipidemia | 6,484 (55.1) | 1,601 (64.5) | <0.001 | ||
Family history of diseases | 10,476 (17.3) | 2,211 (27.7) | <0.001 | ||
Lung cancer | 5,334 (48.7) | 1,123 (48.4) | 0.766 | ||
Esophageal cancer | 1,608 (14.7) | 399 (17.2) | 0.003 | ||
Gastric cancer | 2,681 (24.5) | 534 (23.0) | 0.129 | ||
Liver cancer | 4,718 (43.2) | 874 (37.7) | <0.001 | ||
Colorectal cancer | 2,164 (19.8) | 325 (14.0) | <0.001 | ||
Breast cancer | 4,013 (12.6) | 898 (18.4) | <0.001 | ||
Assessed at high risk for4: | |||||
Lung cancer | 13,249 (21.9) | 2,216 (27.8) | < 0.001 | ||
Esophageal cancer | 9,796 (16.2) | 1,828 (22.9) | < 0.001 | ||
Gastric cancer | 11,151 (18.5) | 2,055 (25.8) | < 0.001 | ||
Liver cancer | 9,237 (15.3) | 1,634 (20.5) | < 0.001 | ||
Colorectal cancer | 11,426 (18.9) | 2,008 (25.2) | < 0.001 | ||
Breast cancer | 6,458 (20.3) | 1,295 (26.6) | < 0.001 |
Values are presented as number (%).
SD, standard deviation; RR, relative risk.
1 Two participants’ ethnicities were missing and 1,760 participants’ ethnicities were neither Han nor Mongolian, and were thus excluded from the analysis; Only Han and Mongolian participants were included in the above analysis (n=68,349).
2 For the categories of “average consumption (per week)” in different types of food: “not much” of fresh vegetables, fresh fruits, red meat, coarse grains was respectively defined as <2,500 g, <1,250 g, <350 g, and <500 g/wk.
3 Meeting the recommended amount of fresh vegetables, fresh fruits, red meat, coarse grains as respectively defined as ≥2,500 g, ≥1,250 g, ≥350 g, and ≥500 g/wk.
4 Assessed at high risk in the targeted 6 types of cancer was defined as a RR ≥1.50 using an established risk score system based on the Harvard Risk Index.
CI, confidence interval.
1 None of the differences in incidence/mortality density between Han and Mongolian ethnicity, regardless of the sex category showed statistical significance (all p-values >0.05).
2 Two participants’ ethnicities were missing and 1,760 participants’ ethnicities were neither Han nor Mongolian, and were thus excluded from the analysis; Only Han and Mongolian participants were included in the above analysis (n=68,349).