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Table 2 Mixed-effect model testing BMI category and weight perception as predictors of Math grades ≥60% among youth

From: Are weight status and weight perception associated with academic performance among youth?

  Females (N = 31,334) Males (N = 30,552)
AOR 95% CI AOR 95% CI
BMI Category (Reference: “Normal weight”)
 Obesity 0.70** 0.59–0.82 0.62** 0.55–0.71
 Overweight 0.90 0.80–1.02 0.87* 0.79–0.97
 Underweight 0.93 0.70–1.25 0.85 0.68–1.07
 Missing weight data 0.56** 0.51–0.61 0.62** 0.57–0.68
 Missing sex, age, or height data 0.64** 0.55–0.74 0.65** 0.57–0.74
Weight Perception (Reference: “About the right weight”)
 Overweight 0.82** 0.75–0.89 0.91 0.83–1.00
 Underweight 0.77** 0.69–0.86 0.90* 0.82–0.97
Missing weight perception 0.64** 0.50–0.83 0.59** 0.47–0.73
Race/ethnicity (Reference: White)
 Nonwhite, multiethnic, or other 0.92 0.85–1.00 0.87** 0.81–0.94
Grade (Reference: 9)
 10 0.82** 0.74–0.90 0.80** 0.73–0.88
 11 0.96 0.87–1.07 0.83** 0.75–0.91
 12 0.91 0.81–1.02 0.88 0.79–0.99
 Othera 1.10 0.95–1.26 1.14 0.99–1.31
Weekly Spending Money (Reference: None)
 $1–$20 0.94 0.84–1.05 0.93 0.84–1.02
 $21–$100 0.94 0.84–1.05 0.89 0.80–0.99
  > $100 0.94 0.83–1.07 0.86* 0.77–0.95
 Don’t know 1.05 0.93–1.19 1.02 0.91–1.14
  1. Note: Cross-sectional data from Year 6 (2017/2018) of the COMPASS study (N = 61,886). The outcome reference category is math grades < 60%. Mixed models were used to account for school clustering by adding a random intercept at the school level
  2. *p < .01
  3. **p < .001
  4. aSecondary I-II in Quebec schools