Table 2.

Napping and sleep-related characteristics of the participants.

Variables	Mean (SD) or Median (IQR) or N (%)
Napping frequency  None  1-2 days/week  3-4 days/week  5-7 days/week	46 (20.4%) 38 (16.8%) 33 (14.6%) 109 (48.2%)
Long napping duration a  Yes  No	61 (33.9%) 119 (66.1%)
Timing of napping a  morning (before 12 pm)  afternoon (12 pm to 4:30 pm)  evening (4:30 pm to 9 pm)	15 (8.3%) 162 (90.0%) 3 (1.7%)
Type of napping a  Appetitive napping  Restorative napping	131 (72.8%) 49 (27.2%)
Sleep duration (h)  Short sleep duration (yes)	6.3 (5.5-7.5) 73 (32.3%)
ISI  Insomnia (yes)	3.0 (1.0-8.0) 37 (16.4%)

^aN=180; IQR, interquartile range; SD, standard deviation; ISI, Insomnia Severity Index.