TABLE 3

Adjusted Differences Between 2003 and 2006 Law Change Categories in Within-Student Change in BMI or Weight Statusa

Weight Measure2003–2006 Lawbβc95% CIP Value
BMI
No change–weak−0.32−0.70, 0.05.09
No change–strong−0.44−0.71, −0.18.002
New laws–weak−0.39−0.56, −0.22.001
New laws–strong−0.10−0.33, 0.12.36
Weaker laws−0.04−0.24, 0.15.66
Overweight
No change–weak−4.0−9.8, 1.8.17
No change–strong−3.6−7.5, 0.3.07
New laws–weak−4.5−6.0, −3.0.001
New laws–strong−2.8−5.5, −0.2.04
Weaker laws−3.2−6.3, −0.1.04
Obesity
No change–weak−1.2−4.8, 2.5.52
No change–strong−0.9−3.4, 1.6.46
New laws–weak−0.8−2.7, 1.1.40
New laws–strong0.0−1.8, 2.0.94
Weaker laws−0.4−5.1, 4.3.88
  • a Referent: States with mean rating = 0 for elementary school laws in 2003 and middle school laws in 2006.

  • b Difference between mean rating for state elementary school laws in 2003 and middle school laws in 2006. No change–weak: Equal mean rating (1–2). No change–strong: Equal mean rating (>2). New laws–weak: Mean higher for 2006 middle school laws (1–2). New laws–strong: Mean higher for 2006 middle school laws (>2). Weaker: Mean lower for 2006 middle school laws.

  • c Absolute difference in average within-student change in BMI or probability of overweight/obesity, based on fixed-effect model, adjusted for locale and SES.