Table 3.

AB and ABID task performance: 17- to 24-month-old children with SSC (“cases”) vs. unaffected children (“controls”).

	Mean						Effect Size	p3	p4
	Cases	Controls	Cases	Controls	Difference1	95% CI2
Overall score (% correct)
A-not-B with 5-second delay	186	140	61.3	59.9	2.4	(−2.1, 6.8)	0.06	0.292	1.00
A-not-B with 12-second delay	186	140	58.2	59.5	−1.0	(−5.9, 3.9)	−0.02	0.686	1.00
A-not-B with Invisible Displacement	154	129	46.5	46.8	0.46	(−4.1, 5.0)	0.01	0.842	1.00
	n		Proportion of participants		Odds Ratio4	95% CI2		p3	p4
	Cases	Controls	Cases	Controls
Score on reversal trials (≥50% correct vs. <50% correct)
A-not-B with 5-second delay	186	140	0.54	0.50	1.4	(0.7, 2.0)		0.179	1.00
A-not-B with 12-second delay	186	140	0.46	0.47	1.1	(0.5, 1.6)		0.750	1.00
A-not-B with Invisible Displacement	149	124	0.32	0.35	0.9	(0.4, 1.3)		0.629	1.00
Correct on first reversal trial
A-not-B with 5-second delay	178	136	0.33	0.23	1.8	(0.9, 2.8)		0.023	0.23
A-not-B with Invisible Displacement	130	109	0.33	0.38	0.7	(0.3, 1.2)		0.288	1.00

¹“Difference” is the average case-control difference in the percent correct between cases and controls, adjusted for age at testing in months, site, gender, maternal IQ, SES (Hollinsghead scale, continuous) and white ethnicity.

²“CI” is confidence interval.

³p values were calculated by using likelihood-ratio tests with one degree of freedom and are two-sided.

⁴Corrected p values are corrected for multiple comparisons by using a stepdown Bonferroni correction procedure.

⁵The odds ratio estimating the average increase or decrease in cases’ vs. controls’ odds of having ≥50% correct on reversals, adjusted for age at testing in months, site, gender, maternal IQ, SES (Hollinsghead scale, continuous), and white ethnicity.