Table 3.

LCA cluster demographics and features for ID and good sleepers (mean ± standard deviation)

Characteristic	Subtype 1	Subtype 2	Subtype 3	Statistic	p	Effect size
ID
Subtype size	40 (22%)	89 (49%)	52 (29%)
Sex, female/male	25/15	73/16	42/10	6.49	.039	0.019
Age, years	48.2 ± 11.5	50.5 ± 12.0	52.2 ± 12.1	1.27	.28	0.014
ISI	15.9 ± 11.5	17.2 ± 3.4	17.0 ± 3.8	1.94	.15	0.021
Mean objective TST, min	398.9 ± 43.2	427.7 ± 37.5	420.1 ± 53.7	5.98	.003	0.063
SD objective TST, min	47.3 ± 22.4	44.5 ± 19.4	53.7 ± 29.9	2.54	.082	0.028
Shortest subjective TST, min	303.6 ± 54.2	241.7 ± 49.7	101.0 ± 52.1	199.42	< .0001	0.691
Mean misperception, min	−16.6 ± 24.0	−87.8 ± 32.2	−134.4 ± 82.4	60.81	< .0001	0.406
SD misperception, min	32.4 ± 13.5	59.8 ± 18.9	89.6 ± 25.2	93.99	< .0001	0.514
CTRL
Subtype size	48 (87%)	5 (9%)	2 (4%)
Sex, female/male	34/14	5/0	0/2	6.93	.047	0.355
Age, years	46.2 ± 15.4	43.2 ± 11.6	58.5 ± 16.3	0.75	.48	0.028
ISI	2.0 ± 2.3	3.6 ± 2.7	6.5 ± 0.7	4.65	.014	0.152
Mean objective TST, min	421.8 ± 46.5	484.0 ± 24.8	302.5 ± 171.1	9.29	.0004	0.263
SD objective TST, min	51.3 ± 21.6	52.4 ± 14.4	41.2 ± 11.1	0.23	.79	0.009
Shortest subjective TST, min	349.0 ± 55.0	299.0 ± 58.8	121.0 ± 12.7	17.90	< .0001	0.408
Mean misperception, min	11.6 ± 24.7	−42.8 ± 25.8	−61.8 ± 82.2	15.24	< .0001	0.37
SD misperception, min	29.8 ± 16.5	74.1 ± 12.8	61.5 ± 75.1	14.06	< .0001	0.351

The Chi‐squared statistic and Cramer's V were used to calculate p‐values and effect sizes for categorical variables.

The F statistic and Eta‐squared were used to calculate p‐values and effect sizes for continuous variables.

Bold font highlights significant differences.

Abbreviations: CTRL, control; ID, Insomnia Disorder; ISI, Insomnia Severity Index; SD, standard deviation; TST, total sleep time.