Table 2.

Participant Weight and Sleep Characteristics (M, SD, range)

Variable	N	%
BMI (31.05, 6.89, 17.13–52.00)
<18.5	1	0.7
18.6–25	24	16.4
25.0–29.9	50	34.2
≥30	71	48.6
Waist circumference (99.45, 17.52, 66.00–158.00)
<80.00 cm	16	10.7
80.0–87.99	24	16.1
≥88 cm	109	73.2
Mean sleep time (11:36 pm, 84 minutes, 7:48 pm–3:54 am)
Sleep time variability (43, 51, 0–412 minutes)
Sleep duration (369, 63, 385 minutes)
Sleep efficiency (79%, 11.5%, 59.8%)
Sleep onset latency (28, 36, 278 minutes)
Sleep quality (2.5, 0.72, 3.4)

A BMI level <18.5 indicates underweight status, a level ≥25 indicates overweight status, and a level ≥30 indicates obese status. A waist circumference ≥88 cm indicates central obesity. Sleep efficiency is the average percentage of total sleep time subtracted by the total wake time for each evening rest interval. Sleep quality is rated on a 1–5 scale, with “1” indicating “very good” and “5” indicating “very poor.”

BMI, body mass index.