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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