Table 2

Associations between demographic characteristics or BMI category and attempts to lose weight

8–12 years old13–17 years old
OR95% CIP valueOR95% CIP value
Year of survey1.021.01 to 1.03<0.0011.071.06 to 1.08<0.001
BMI category*
 Underweight0.180.08 to 0.40<0.001N/AN/A<0.001
 Overweight4.013.47 to 4.64<0.0011.961.58 to 2.42<0.001
 Obesity13.5711.94 to 15.43<0.0014.723.94 to 5.66<0.001
 Girls1.040.95 to 1.150.3732.662.41 to 2.95<0.001
 Asian1.721.43 to 2.07<0.0011.571.29 to 1.93<0.001
 Black1.321.03 to 1.680.0281.371.02 to 1.840.039
 Other and mixed1.190.94 to 1.500.1451.170.91 to 1.500.224
Household income levels
 Q11.211.01 to 1.440.0361.180.98 to 1.420.086
 Q21.201.01 to 1.430.0361.180.97 to 1.430.090
 Q31.140.96 to 1.360.1441.221.02 to 1.470.034
 Q41.060.88 to 1.270.5641.090.90 to 1.330.372
  • *BMI for age z-score; Q1 (<=GBP11 676.65), Q2 (>GBP11 676.65<=GBP19 117.65), Q3 (>GBP19 117.65<=GBP27 704.92), Q4 (>GBP27 704.92<=GBP47 794.12) and Q5 (>GBP47 794.12). Estimates from multivariable logistic regression model. Each coefficient shows the OR of trying to lose weight compared with the reference category while adjusting for all other determinants of weight loss attempts. Reference groups for categorical variables; boys, whites, >GBP47 794.12, and normal BAZ classification. Estimates for missing category (BAZ classifications and household income) are omitted. For survey year, the OR is per increasing year. There is no OR estimate for 13–17 age group because there was nobody trying to lose weight. P value<0.05 to denote statistical significance.

  • BAZ, body mass index for age z-score; BMI, body mass index.