Table 6. Standardized Working Memory Scores (Recall of Digits Forward and Backward)^†, means (sd).

	Baseline T Score (sd)			Post-Intervention T Score (sd)			Change Scores, T Score (sd)
	Active	Placebo	P	Active	Placebo	P	Active	Placebo	P
RECALL OF DIGITS FORWARD
All randomized (n = 362)	41.0 (8.2)	40.0 (7.7)	0.174	42.6 (8.4)	41.2 (7.7)	0.037	1.6 (6.2)	1.2 (5.7)	0.419
Reading ≤20th Centile (n = 224)	39.8 (8.0)	39.9 (8.6)	0.812	41.9 (8.5)	40.5 (8.0)	0.104	2.0(6.8)	0.7 (5.6)	0.069
Reading ≤10th Centile (n = 105)	39.4 (7.3)	39.1 (9.9)	0.607	41.9 (8.0)	40.2 (9.3)	0.132	2.5 (7.2)	1.1 (6.0)	0.247
RECALL OF DIGITS BACKWARD
All randomized(n = 362)	44.0 (6.4)	44.0 (7.1)	0.767	44.3 (7.1)	43.7 (7.0)	0.621	0.4 (7.3)	−0.3 (7.4)	0.204
Reading ≤20th Centile (n = 224)	43.7 (6.1)	43.5 (7.5)	0.841	44.3 (7.0)	42.8 (7.7)	0.396	0.6 (6.8)	−0.7 (7.3)	0.173
Reading ≤10th Centile (n = 105)	42.9 (5.0)	43.2 (7.2)	0.837	44.0 (7.5)	42.3 (8.6)	0.473	1.0 (6.5)	−0.9 (8.2)	0.187

^†T scores have a mean of 50, sd = 10 and are derived from the British Ability Scales II.¹³.