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Table 3 Mixed-effect model testing BMI category and weight perception as predictors of English/French 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 0.51** 0.41–0.64 0.63** 0.55–0.73
 Overweight 0.71** 0.60–0.85 0.87 0.77–0.99
 Underweight 1.04 0.68–1.59 0.93 0.71–1.21
 Missing weight data 0.45** 0.40–0.50 0.54** 0.49–0.60
 Missing sex, age, or height data 0.49** 0.40–0.59 0.58** 0.51–0.66
Weight Perception (Reference: “About the right weight”)
 Overweight 0.76** 0.68–0.85 0.83** 0.75–0.92
 Underweight 0.59** 0.51–0.69 0.87* 0.79–0.95
 Missing weight perception 0.50** 0.36–0.68 0.66** 0.51–0.84
Race/ethnicity (Reference: White)
 Nonwhite, multiethnic, or other 0.67** 0.60–0.75 0.74** 0.68–0.80
Grade (Reference: 9)
 10 0.96 0.83–1.10 0.94 0.85–1.05
 11 0.87 0.75–1.00 0.94 0.84–1.05
 12 1.07 0.90–1.27 1.06 0.93–1.21
 Othera 1.19 0.98–1.44 1.12 0.97–1.29
Weekly Spending Money (Reference: None)
 $1–$20 0.88 0.75–1.03 1.08 0.97–1.21
 $21–$100 0.95 0.80–1.11 1.05 0.93–1.18
  > $100 0.88 0.74–1.06 0.93 0.83–1.05
 Don’t know 0.99 0.84–1.18 1.09 0.96–1.23
  1. Note: Cross-sectional data from Year 6 (2017/2018) of the COMPASS study (N = 61,886). The outcome reference category is English/French 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