Association of Sleep Duration with Obesity among US High School Students

Table 1

Prevalence of insufficient and long sleep duration and obesity—US high school students.

Demographic subgroup	Sleep duration^a	Insufficient (≤7 hours)		Long (≥9 hours)		Obese (BMI ≥ 95th percentile)^b
	(N)	%	95% CI	%	95% CI	(N)	%	95% CI
Total	(26,936)	69.0	67.8–70.3	7.6	7.1–8.1	(28,240)	12.4	11.7−13.2
Sex
Female	(13,575)	71.6	70.3–72.8	6.2	5.6– 6.9	(14,096)	8.9	8.1−9.7
Male	(13,297)	66.6	65.2–68.1	8.9	8.1– 9.7	(14,144)	15.7	14.5−17.0
Race/ethnicity
White	(11,728)	69.2	67.7–70.7	6.7	6.1–7.3	(12,032)	10.5	9.5−11.7
Black	(5,114)	70.5	68.7–72.3	8.7	7.6–10.0	(5,357)	16.6	15.3−18.1
Hispanic	(7,296)	65.8	63.2–68.3	9.7	8.5–11.0	(7,863)	15.7	14.5−17.1
Other	(2,357)	72.5	68.3–76.2	7.1	5.1– 9.9	(2,605)	11.4	9.8−13.3
Grade
9th	(6,615)	59.1	57.4–60.7	12.5	11.2–13.8	(6,922)	12.7	11.7−13.9
10th	(6,485)	68.2	66.3–70.1	7.1	6.2–8.0	(6,877)	12.0	10.9−13.1
11th	(6,808)	74.1	72.2–76.0	5.4	4.8–6.2	(7,130)	12.2	11.1−13.4
12th	(6,878)	76.8	74.9–78.7	4.3	3.7–5.1	(7,256)	12.8	11.4−14.4

N = unweighted sample size. CI = confidence interval.
^aOn an average school night.
^bBased on self-reported height and weight, body mass index (BMI = weight [kg]/height [m]²) ≥95th percentile using growth charts developed by the Centers for Disease Control and Prevention for youth aged 2–20 years.