Table 1.

Baseline characteristics of young adult drinkers with insomnia (N=56).

Demographics	M (SD) or n (%)
Age	22.4 (2.7)
Female (vs. male)	42 (75%)
Race	---
European American alone	46 (82%)
African American alone	3 (5%)
Asian American alone	0 (0%)
Native American or Native Alaskan alone	1 (2%)
Native Hawaiian or Pacific Islander alone	0 (0%)
Two or more races	6 (11%)
Hispanic/Latinx	2 (4%)
Current college enrollment	41 (73%)
Alcohol Use and Sleep	M (SD) or n (%)
Number of drinking days (diary reports)	4.13 (2.19)
Drinks per drinking day (diary reports)	4.17 (3.01)
Hazardous drinking (AUDIT total score)	9.54 (4.34)
Positive screen (AUDIT score ≥ 8)	37 (66%)
Use of alcohol as a sleep aid (diary reports)	7 (13%)
Insomnia severity (ISI total score)	16.18 (3.51)
Positive insomnia screen (ISI score ≥ 10)	56 (100%)
Sleep quality (0-4; diary reports)	1.92 (0.57)
Sleep efficiency (0-100%; diary reports)	---
Diary self-reports	76.63 (10.41)
Actigraphy	76.94 (6.45)
Bedtime (military time; diary reports)	24.42 (1.02)
Waketime (military time; diary reports)	8.49 (1.11)
Total sleep time (hours; diary reports)	7.03 (1.17)

Note. AUDIT=Alcohol Use Disorders Identification Test. ISI=Insomnia Severity Index.