Table 4.
Area under the curve (AUC) and 95% confidence interval from receiver operating characteristic (ROC) curve contrasts for anthropometric predictors of insulin resistance in prepubertal children aged 6–10 years, Bucaramanga, Colombia*†
| HOMAIR ≥ 90th percentile | HOMAIR ≥ 95th percentile | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ROC model | AUC | 95% CI | Δ in AUC | 95% CI | P‡ | AUC | 95% CI | Δ in AUC | 95% CI | P‡ |
| BMIZ | 0·794 | 0·752, 0·837 | Referent | – | 0·837 | 0·790, 0·884 | Referent | – | ||
| WCZ | 0·799 | 0·757, 0·842 | 0·005 | −0·017, 0·026 | 0·65 | 0·852 | 0·803, 0·900 | 0·015 | −0·010, 0·040 | 0·25 |
| WHtR | 0·748 | 0·700, 0·795 | −0·047 | −0·075, −0·019 | <0·01 | 0·809 | 0·755, 0·863 | −0·028 | −0·064, 0·008 | 0·12 |
| ASFZ | 0·808 | 0·766, 0·849 | 0·013 | −0·009, 0·036 | 0·25 | 0·864 | 0·823, 0·905 | 0·027 | −0·001, 0·055 | 0·06 |
| SSFZ | 0·796 | 0·751, 0·840 | 0·001 | −0·026, 0·028 | 0·92 | 0·851 | 0·805, 0·905 | 0·014 | −0·020, 0·047 | 0·43 |
| TSFZ | 0·780 | 0·735, 0·825 | −0·015 | −0·046, 0·017 | 0·36 | 0·821 | 0·770, 0·872 | −0·016 | −0·064, 0·008 | 0·44 |
| BSFZ | 0·780 | 0·736, 0·824 | −0·015 | −0·046, 0·017 | 0·37 | 0·830 | 0·779, 0·881 | −0·007 | −0·053, 0·040 | 0·77 |
| BMIZ+ASFZ | 0·811 | 0·770, 0·851 | 0·017 | 0·004, 0·029 | 0·01 | 0·864 | 0·823, 0·905 | 0·027 | 0·006, 0·048 | 0·01 |
HOMAIR, homeostasis model assessment of insulin resistance.
*
For all ROC models, n 1261.
†
BMI Z-score (BMIZ) was used as reference in all contrast estimates and tests against waist circumference Z-score (WCZ), waist-to-height ratio (WHtR), abdominal skinfold thickness Z-score (ASFZ), subscapular skinfold thickness Z-score (SSFZ), triceps skinfold thickness Z-score (TSFZ) and biceps skinfold thickness Z-score (BSFZ).
‡
P for contrast compared the AUC of the specified ROC model v. the BMIZ model.