Table 1.

Categorical measures in girls with assessments on glucose, insulin and HOMA-IR by modifiable risk factors at ages 16–17 and 18–19 years (n 774), NHLBI Growth and Health Study

Categorical measure	Category	n	%
Race	White	389	50·3
	Black	385	49·7
Highest level of parental education	High school or less	150	19·4
	College (some post high-school education)	303	39·1
	College (≥4 years)	321	41·5
Menstruating at 16–17 years	Yes	726	93·8
	No	48	6·2
Menstruating at 18–19 years	Yes	774	100·0
	No	0	0·0
Cotinine	0	685	88·5
	>0 (ng/ml)	89	11·5
Smoking status at 16–17 years	Smoker	125	16·1
	Non-smoker	648	83·5
Smoking status at 18–19 years	Smoker	225	29·1
	Non-smoker	548	70·7
Obese at 16–17 years†	Obese	107	13·8
	Not obese	667	86·2
Obese at 18–19 years†	Obese	146	18·9
	Not obese	628	81·1

HOMA-IR, homeostasis model assessment of insulin resistance; NHLBI, National Heart, Lung, and Blood Institute.

†Age- and sex-standardized cut-off points of the International Obesity Taskforce applied.