Table 1.

Distribution of subjects according to sociodemographic factors and their association with risk of breast cancer (univariate analysis)

Analysis was performed using T Student test, odds ratios (OR) was not calculated for this variables. But for the rest of the table variables chi-square test and univariate logistic regression to calculate crude OR and 95% confidence intervals (CI) were used.

Hx=history; BMI=body mass index; ref.=reference.

^*Eating at least 5 servings of fruits and vegetables per day (Every serving of fruit equals one medium apples or oranges or bananas or three-fourths cup of strawberries or fruit juice, and each serving of vegetables equals half a cup of cooked vegetables or one cup of raw vegetables or cabbage or lettuce, carrots or zucchini or eggplant or medium sized potatoes or tomatoes); ^†Daily use of fried foods, animal fats, mayonnaise, and high fat diary; ^‡Physical activity at least 30 minutes a day, 3 times a week; ^§25,500 Rials (unit of currency in Iran) ~1 US dollar; ^¶Mean±SD.