Table 2.

Annual incidence rates of MCI by study setting and SCD classification

	Memory disorders clinic (N=195)		Population study (N=1181)
Annual incidence rate (95 % CI)	5% (4% – 7%)		16% (14% – 17%)
Years of follow-up, mean (SD)	3.89 (3.42)		3.09 (2.95)
Number of participants progressed to MCI (N)	37		568
MCI subtype
Amnestic MCI (N)	28		86
Non-amnestic MCI (N)	9		482
	SCD (N=113)	NC (N=82)	SCD (N=592)	NC (N=589)
Annual incidence rate (95 % CI)	10% (7% – 15%)	2% (1 – 4%)	18% (16%–20%)	14% (12% – 16%)
Years of follow-up, mean (SD)	2.55 (2.10)	5.73 (3.78)	2.88 (2.29)	3.30 (2.43)
Number of participants progressed to MCI (N)	29	8	299	269
MCI subtype
Amnestic MCI (N)	23	5	47	39
Non-amnestic MCI (N)	6	3	252	230

Note. SCD = subjective cognitive decline; NC = non-complainers; MCI = mild cognitive impairment