Table 6.

Cognitive assessment.

CANTAB Test (unit of measurement)	Intervention	Study Period	Mean ​± ​SEM	Baseline Comparison∗	Exam Stress$	Placebo v 1714%
PAL Total Errors adjusted	Placebo	Baseline	3.80 ​± ​0.70	NS
(no. of errors)		Exam Stress	2.42 ​± ​0.54		NS	NS
	B. longum	Baseline	2.26 ​± ​0.58
		Exam Stress	2.30 ​± ​0.50		NS
PAL total errors adjusted 8	Placebo	Baseline	2.00 ​± ​0.54	NS
(no. of errors)		Exam stress	2.00 ​± ​0.46		NS	NS
	B. longum	Baseline	1.37 ​± ​0.39
		Exam stress	1.75 ​± ​0.42		NS
PAL Mean Trials to success	Placebo	Baseline	1.32 ​± ​0.05	NS		NS
(no. of trials)		Exam Stress	1.26 ​± ​0.06		NS
	B. longum	Baseline	1.22 ​± ​0.05
		Exam Stress	1.22 ​± ​0.05		NS
RVP Total Hits	Placebo	Baseline	21.40 ​± ​0.94	NS		NS
(no. of hits)		Exam Stress	23.30 ​± ​0.67		∗∗
	B. longum	Baseline	21.21 ​± ​0.79
		Exam Stress	23.80 ​± ​0.68		∗∗∗
RVP Total Misses	Placebo	Baseline	5.60 ​± ​0.94	NS		NS
(no. of misses)		Exam stress	3.70 ​± ​0.67		∗∗
	B. longum	Baseline	5.79 ​± ​0.79
		Exam stress	3.20 ​± ​0.68		∗∗∗
RVP Mean Latency	Placebo	Baseline	384.56 ​± ​15.63	∗		NS
(milliseconds)		Exam stress	356.81 ​± ​10.12		NS
	B. longum	Baseline	360.79 ​± ​11.20
		Exam stress	355.26 ​± ​12.08		NS
SSP Span Length	Placebo	Baseline	7.65 ​± ​0.18	NS		NS
(no. of stimuli recalled)		Exam stress	8.30 ​± ​0.22		∗∗	∗
	B. longum	Baseline	7.60 ​± ​0.18
		Exam Stress	8.50 ​± ​0.20		∗∗
ERV Percent Correct	Placebo	Baseline	75.97 ​± ​0.98	NS		NS
(percentage)		Exam stress	77.56 ​± ​1.02		NS
	B. longum	Baseline	76.03 ​± ​1.15
		Exam stress	78.19 ​± ​1.03		NS
Reading the Mind in the Eyes	Placebo	Baseline	27.05 ​± ​0.70	NS
(score)		Exam stress	28.05 ​± ​0.73		NS	∗
	B. longum	Baseline	27.55 ​± ​0.66
		Exam stress	27.65 ​± ​0.73		NS

NS ​= ​not significant, ∗baseline comparison at visit 1 pre-treatment, ^$baseline versus exam stress, ^%placebo versus probiotic during exam period.