Table 4.

PiB PET Studies in MCI: Prevalence and Conversion

Reference	Number of MCI Subjects			Number of Converters			Duration (years)
	Total	PiB(+)	PiB(−)	Total	PiB(+)	PiB(−)
Cross-Sectional
(Rowe et al., 2010)	57	39	18	n/a	n/a	n/a	n/a
(Devanand et al., 2010)	24	7	17	n/a	n/a	n/a	n/a
(Tolboom et al., 2009d)	13	5	8	n/a	n/a	n/a	n/a
(Lowe et al., 2009)	23	9	14	n/a	n/a	n/a	n/a
Longitudinal
(Forsberg et al., 2008)	21	11	10	7	7	0	0.7±0.5
(Koivunen et al., 2008)	15	13	2	6	6	0	2
(Wolk et al., 2009)	23	13	10	5	5	0	1.8±1.3
(Okello et al., 2009b)	31	17	14	15	14	1	1 to 3
(Jagust et al., 2010)a	65	47	18	24	21	3	1–2
Total Longitudinal	155	101	54	57	53	4
Total All Studiesb	272	161	111

^aADNI data.

^bOnly the most recent report from each research group was used to avoid subjects being reported multiples times. When only graphical data were published without mean ± SD, these values were derived from the graph. If specific assignment of PiB-positivity was not made in the report, visual interpretation of graphic data using 1.5 SUVR or an equivalent measure in other units was performed.