3 At baseline, in 1981, age, smoking history (current or former smoker vs never smoked), alcohol consumption (at least once a week vs less) and physical activity during previous year (vigorous physical activity at least once a week vs less) were assessed.
Time-independent factors measured at baseline included age (years), sex (male or female), number of years of school (< or ≥ 6 years), BMI, alcohol consumption at least once a month for 10 years or longer (yes or no), and moderate physical activity at least once a week (yes or no).
The proportion of individuals who reported regular alcohol consumption at least once a month for ≥ 10 years was 23%, and 63% of participants reported moderate exercise at least once a week.
Current use of alcohol was defined as alcohol consumption at least once a year.
For example, in Poland 10%% of pregnant women experienced alcohol consumption at least once during pregnancy.
Shellfish consumption at least once a month was associated with a higher risk of a food allergy.
The intake levels of soyfoods among women in Shanghai are high, with 96.6% women reporting soyfood consumption at least once a week.
Specific substance use patterns based on the EuropASI were dichotomized into drug consumption at least once weekly versus less than weekly.
In our survey of Chinese MSM living in Beijing, 23% of participants reported alcohol consumption at least once a week, and no association was noted with HIV or syphilis seropositivity.
The prevalence of alcohol consumption at least once a week (28.5%) and current smoking (69%) among the cleanup workers was studied in a postal questionnaire survey conducted in 1992 1993, 19 but not included in current analyses due to small cohort size and lack of longitudinal data on these factors of health behaviour.
One possible explanation to this finding was that most studies have usually measured coffee consumption only once at the beginning of the study, and have assessed the outcomes at the end of the follow-up.
