Table 2.

Dementia events in the propensity score-matching study populations.

Study Event	Study		Control		Crude IRR (95% CI)
	Event Number/ Person-months	Incidence Rate, per 1000 PMs (95% CI)	Event Number/ Person-Months	Incidence Rate, per 1000 PMs (95% CI)
Any dementia	1185/1222688	9.69 (9.16–10.26)	1119/1138846	9.83 (9.27–10.42)	0.99 (0.91–1.07)
VD	906/1234948	7.34 (6.87–7.83)	878/1149290	7.64 (7.15–8.16)	0.96 (0.88–1.05)
AD	97/1262946	0.77 (0.63–0.94)	86/1177323	0.73 (0.59–0.90)	1.05 (0.79–1.41)
PD	405/1249010	3.24 (2.94–3.57)	368/1166108	3.16 (2.85–3.50)	1.03 (0.89–1.18)

IRR: incidence relative risk; PMs: person-months; CI: confidence intervals; VD: vascular dementia; AD: Alzheimer’s disease; PD: Parkinson’s disease