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. 2019 Oct 31;29(1):e12937. doi: 10.1111/jsr.12937

Table 1.

Participant demographics (mean ± standard deviation)

Characteristic Control (n = 55) ID (n = 181) p
Sex, female/male 39/16 140/41 .37
Age, years 46.4 ± 15.1 50.5 ± 12.0 .11
ISI 2.3 ± 2.5 16.8 ± 3.4 < .0001

Bold font highlights significant differences.

Abbreviations: ID, Insomnia Disorder; ISI, Insomnia Severity Index.