Table 2.

Unadjusted acute measures stratified by intervention arm

	Placebo (n = 29)				Blueberry (n = 31)				p-Value
	Baseline		2 h		Baseline		2 h
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Positive affect (0–88)	22.5	10.7	23.0	11.2	19.8	9.7	24.2	11.5	0.026*
Negative affect (0–100)	20.2	13.3	14.1	11.9	19.4	12.8	15.3	12.4	0.40
Calmness (0–12)	5.1	2.5	5.4	2.4	4.6	2.1	5.6	1.9	0.49
Fatigue (0–16)	7.9	4.6	7.0	3.8	8.6	3.7	7.4	3.7	0.41
Accuracy on switch trials, %	71.5	13.5	72.7	13.4	74.0	12.0	77.5	11.2	0.025*
Accuracy on non-switch trials, %	87.0	7.9	87.8	6.9	88.0	7.5	89.5	7.3	0.068†
Reaction time on switch trials, ms	580	49	555	49	564	52	556	59	0.033*
Reaction time on non-switch task, ms	526	41	504	41	515	52	506	53	0.050*

p-Values refer to the effect of treatment in ANCOVAs adjusted for baseline, sex, FV intake, and the interactions of treatment with sex and FV intake. One participant from the placebo group was excluded from the each of the analyses for PA, NA and reaction time due to being an outlier. † denotes p < 0.1 and * denotes p < 0.05