An overworked and overstressed graduate student forgot to label this chart.

Please help the student to restore the valuable data! What do you think may be

shown on vertical axis of this chart? (Hint: please refer to lectures and examine

units on the chart closely)

5-

0

-5

-10-

-15-

-20

-25-

-30-

-35-

-40-

-45

0 1

2 3 4

6

Diet and exercise

+

8

Banding

Gastric

bypass

10

O absolute change in body weight in kg or lb AND change in BMI/n-25-

-30-

-35-

-40-

-45+

0

+++

12 3 4

6

Gastric

bypass

10

absolute change in body weight in kg or lb AND change in BMI

O age in years since surgery

O absolute change in body weight in kg or lb

O change in BMI

O number of research subjects