Figure 1.  Comparison between obstetricians in practice for < 10 years and those in practice for > 10 years on their ratings of the extent to which regular aerobic exercise can reduce the risk of gestational diabetes mellitus. Responses were made on a 7-point Likert scale where 1 was equated to "not at all" and 7 was equated to "quite a lot". The difference between the two groups was significant (p = 0.004).