Risk of dementia in patients with primary insomnia: a nationwide population-based case-control study

BMC Psychiatry

Table 2 Dementia risk among sampled patients during the 3-year follow-up period after index healthcare utilization

Type of sleep disorder	n	Persons-years	dementia case	Unadjusted		Adjusted
Type of sleep disorder	n	Persons-years	dementia case	HR	95% CI	HR	95% CI
No insomnia	258,715	1,303,464.02	3472	1.00	(reference)	1.00	(reference)
Primary insomnia	51,745	233,853.23	1316	2.17*	(2.04-2.32)	2.14*	(2.01-2.29)

CI confidence interval
*p < 0.05 The Hazard Ratio (HR) was calculated by using the stratified Cox proportional regression method (stratified by sex, age group, and year of index healthcare use) during the 3-year follow-up period. Adjustments were made for the following selected comorbidities in the patients: diabetes, hyperlipidemia, hypertension, coronary heart disease, chronic liver disease, and chronic kidney disease

ISSN: 1471-244X