Table 1

Test properties of maximised cut-off probability for language disability, overweight/obese and socioemotional behavioural problems at age 11

Test propertiesMaximised cut-offs
Cognitive language disability (%)*Physical overweight/obese (%)†Behavioural socioemotional problems (%)‡
Model 1Model 2Model 3Model 1Model 2Model 3Model 1Model 2Model 3
Sensitivity57.055.868.564.266.768.260.762.269.6
Specificity71.677.471.6260.769.167.670.379.374.0
PPV12.715.214.8937.644.343.715.421.019.2
NPV95.896.096.982.284.985.295.395.996.5
% of positives30.324.831.146.040.542.032.224.129.5
Correctly classified70.675.971.461.768.567.869.577.973.7
  • Millennium Cohort Study, 2001–2012, UK (imputed data, n=10 262).

  • *Maximised cut-offs used for language disability (model 1: 0.08, model 2: 0.08, model 3: 0.07). 

  • †Maximised cut-offs used for overweight/obese (model 1: 0.24, model 2: 0.26, model 3: 0.25). 

  • ‡Maximised cut-offs used for socioemotional behavioural problems (model 1: 0.09, model 2: 0.09, model 3: 0.08).

  • % of positives: total of children classified as positive, even if it is true or not; correctly classified: true positives plus true negatives; NPV, negative predictive value; PPV, positive predictive value.