Figure 4

Mean BMI and standard deviation with respect to the time of follow-up in the four baseline BMI groups. (a) Average BMI with respect to follow-up time in the underweight group. (b) Average BMI with respect to follow-up time in the normal-weight group. (c) Average BMI with respect to follow-up time in the overweight group. (d) Average BMI with respect to follow-up time in the obese group.