Association of small for gestational age and large for gestational age birth with weekly gestational weight gain in 2nd and 3rd trimesters and with total weight gain (according to Institute of Medicine, 2009 categories).

†Differences from 2,244 due to lack of data on specific outcome (small and large for gestational age).‡Significant relative risk.*Small-for-gestational-age: Model 2 (2nd trimester) = Model 1+ pre-pregnancy BMI, hypertensive disorders, height, smoking and 3rd trimester weight gain. Age, skin color, parity and diabetes were removed due to lack of statistical significance. Model 2 (3rd trimester) = Model 1+ pre-pregnancy BMI, hypertensive disorders, height, smoking and 2nd trimester weight gain. Age, skin color, parity and diabetes were removed due to lack of statistical significance. Model 2 (total weight gain) = Model 1+ pre-pregnancy BMI, hypertensive disorders, smoking and diabetes. Age, skin color, parity and height were removed due to lack of statistical significance.**Large-for-gestational-age: Model 2(2nd trimester) = Model 1+ pre-pregnancy BMI, 3rd trimester weight gain, diabetes, smoking and height. Age, skin color, parity and education were removed due to lack of statistical significance. Model 2 (3rd trimester) = Model 1+ pre-pregnancy BMI, height, 2nd trimester weight gain, smoking and diabetes. Age, parity and education were removed due to lack of statistical significance. Model 2 (total weight gain) = Model 1+ pre-pregnancy BMI, smoking, diabetes and height. Age, parity, and education were removed due to lack of statistical significance.Reference category = Adequate weight gain.Brazilian Study of Gestational Diabetes (EBDG).