The Relieving Effects of BrainPower Advanced, a Dietary Supplement, in Older Adults with Subjective Memory Complaints: A Randomized, Double-Blind, Placebo-Controlled Trial

Table 6

(a) Subtest scores (mean ± s.d.) of memory function test before and after the interventions between BrainPower Advanced and placebo groups. (b) Comparison of the combined total memory function test scores between BrainPower Advanced and placebo groups shows no differences between the two groups before or after the interventions. However, BrainPower Advanced and placebo interventions both improved the combined total scores significantly ( each). (c) Different impacts of BrainPower Advanced and placebo interventions on the improvement of memory function tests. Ridit scoring test of the ranked data showed a better improvement after BrainPower Advanced intervention than after placebo interventions ().

(a)

Memory function subtest scores		Before intervention	After intervention	Improvement relative; to baseline (= 1)
Audio/visual memory	BrainPower	2.28 ± 1.06	3.43 ± 0.83	1.50	−8.247	<0.001
	Placebo	2.51 ± 0.81	3.41 ± 1.00	1.36	−5.014	<0.001
		−1.232	0.074
		0.221	0.941
Abstracting ability	BrainPower	2.40 ± 1.08	3.45 ± 0.75	1.44	−6.602	<0.001
	Placebo	2.73 ± 1.08	3.47 ± 0.92	1.27	−4.791	<0.001
		−1.474	0.081
		0.144	0.889
Memory retrieval	BrainPower	2.17 ± 1.15	2.81 ± 0.92	1.29	−3.526	0.001
	Placebo	2.18 ± 1.14	2.47 ± 0.83	1.13	−1.820	0.075
		−.027	0.410
		0.979	0.060

(b)

	Before intervention	After intervention
BrainPower	6.85 ± 2.46	9.66 ± 1.85	8.478	<0.001
Placebo	7.37 ± 2.32	9.39 ± 1.98	6.988	<0.001
	−1.08	0.692
	0.283	0.491

(c)

Score change	⁢BrainPower intervention		⁢Placebo control		Total
	−5	1	2.1	0	0	1	1
−3	0	0	1	2	1	1
−2	1	2.1	2	3.9	3	3.1
−1	1	2.1	5	9.8	6	6.1
0	2	4.3	2	3.9	4	4.1
+1	6	12.8	5	9.8	11	11.2
+2	7	14.9	17	33.3	24	24.5
+3	12	25.5	8	15.7	20	20.4
+4	9	19.1	5	9.8	14	14.3
+5	2	4.3	5	9.8	7	7.1
+6	4	8.5	0	0	4	4.1
+7	2	4.3	1	2	3	3.1
Total	47	100.0	51	100.0	98	100.0