Table 4.

Stratified results (high subjective cognitive concerns versus the remainder of the sample) for the significant subgroup interaction effect between high sleep symptomology (vs. none) and detection speed scores

	Detection speed estimated marginal mean (SE)*		Cohen’s d (95% CI)	p
Subjective cognitive concerns	No sleep symptomatology	High sleep symptomatology
High (top CFI quartile)	n = 114	n = 86
	1.524 (0.008)	1.493 (0.010)	0.34 (0.06, 0.62)	0.02
Low (remainder of the sample)	n = 521	n = 179
	1.517 (0.004)	1.526 (0.006)	−0.10 (−0.27, 0.07)	0.23

Higher detection speed scores indicate better psychomotor function. Models are adjusted for the effects of age, sex, education, depression, anxiety, BMI, smoking, diabetes, and hypertension. Sleep symptomatology none, normal scores on the PSQI, ISI, and ESS; Sleep symptomatology high, abnormal sleep on at least two of the three sleep questionnaires. CFI, cognitive function instrument.