Incidence and prevalence of dementia in linked administrative health data in Saskatchewan, Canada: a retrospective cohort study

Table 9 Timing of identification of incident and prevalent dementia in Long-term Care among adults 45 years of age and older, Saskatchewan, by criteria at first identification (April 1, 2012 to March 31, 2013)

Criteria at first identification of dementia	Incident cases (N = 1,144)				Prevalent cases (N = 3,217)
	First identification at admission^a		First identification ≥30 days after admission^b		First identification at admission^b		First identification ≥30 days after admission^b
	n	%	n	%	n	%	n	%
CPS Scale Score^c
2 Mild impairment (MMSE EA 19)	334	75.56	108	24.44	769	68.78	349	31.22
3 Moderate impairment (MMSE EA 15)	358	81.17	83	18.83	945	69.53	414	30.46
4 Moderately severe impairment (MMSE EA 7)	70	89.74	8	10.26	145	71.78	57	28.22
5 Severe impairment (MMSE EA 5)	95	86.36	15	13.64	241	67.89	114	32.11
6 Very severe impairment (MMSE EA 1)	28	80.0	7	20.0	52	57.14	39	42.85
Disease category
Alzheimer disease and CPS <2	<6	*	<6	*	6+	*	<6	*
Dementia other than Alzheimer disease and CPS <2	6+	*	6+	*	6+	*	6+	*
Total	912	79.72	232	20.28	2,216	68.89	1,001	31.11

*Not reported due to an insufficient number of cases (i.e., between 1 and 5) or an indeterminate number of cases
^aAdmission occurred April 1, 2012 to March 31, 2013
^bAdmission occurred prior to April 1, 2012
^cMini-Mental State Examination Equivalent Average (MMSE EA) scores derived from Morris et al. 1994 [50]

ISSN: 1471-2318