Fig. 2
Risk of diabetes mellitus according to the average breastfeeding duration. Adjusted for sociodemographic characteristics (age at enrollment, BMI, household income, areas of residence, occupations, and education level), obstetric characteristics (gravidity, age at first delivery, age at the last delivery, age at menarche, and age at menopause), medical diseases (hypertension, myocardial infarction, angina, stroke, hypercholesterolemia, hyperlipidemia, osteoarthritis, rheumatoid arthritis, pulmonary tuberculosis, asthma, thyroid-related disease, major depressive disorder, kidney failure, hepatitis B, hepatitis C, liver cirrhosis, gastric cancer, hepatic cancer, colorectal cancer, breast cancer, cervical cancer, and lung cancer), family histories, and socioeconomic and lifestyle characteristics (history of smoking, alcohol consumption, weekly weight training routines, stress awareness, and feeling depression within one year)