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Table 2 Item response theory parameters of unhealthy weight control

From: Identifying the ‘red flags’ for unhealthy weight control among adolescents: Findings from an item response theory analysis of a national survey

  Healthy Unhealthy
  Difficulty Discrimination Difficulty Discrimination
Vomited - - 2.328 1.238
Diet pills - - 2.144 0.881
Smoked cigarettes - - 2.546 0.620
Fasted - - 1.412 1.401
Skipped meals - - 0.630 1.226
Exercised -2.628 0.553 - -
Ate less fatty food -0.641 1.931 - -
Counted calories 3.370 0.465 4.458 0.337
Ate fewer sweets/less sugar -0.082 1.005 - -
Ate fewer carbohydrates 1.569 0.696 3.446 0.269
Ate high protein diet 2.053 0.590 - -