Association of factors related to cooking behavior and early menopause in Chinese household

The individual survey contains these demographic data: Name; Gender; Birth date; Menopause state; The age of menopause; Educational level; Occupational hazard factors in the previous occupation; Passive smoking at home in the past years; Cardiovascular diseases family history; Family address; Surgery history and operation name.The household environment survey included: Cooking at home or not; Cooking time every day on weekdays/weekends in spring and autumn/winter/summer (hour/minute); Exhaust fans frequency; Exhaust fans time; Stove type; Fuel type; Daily window opening time depending on the season (hour/minute).