Table 2.

Cognitive data adjusted for gender, race, and maternal education. Presented as least squares means (95% confidence interval) and p values.

	Outcomes	Pre-term	Term	Group difference	Interaction (slope difference)
VIQ	8 years	104.1 (96.7, 111.5)	109.8 (102.3, 117.4)	− 5.7 (− 16.3, 4.9) p = 0.27
	16 years	98.3 (90.8, 105.8)	109.6 (101.6, 117.6)	− 11.4 (− 22.4, − 0.3) p = 0.04
	Changes from 8 to 16 years	− 5.9 (− 12.6, 0.9) p = 0.09	− 0.2 (− 7.6, 7.2) p = 0.95		− 5.6 (− 15.8, 4.5) p = 0.26
PIQ	8 years	97.2 (87.8, 106.7)	110.0 (100.5, 119.5)	− 12.8 (− 26.2, 0.7) p = 0.06
	16 years	94.0 (84.1, 103.9)	114.9 (104.7, 125.1)	− 20.9 (− 35.1, − 6.6) p = 0.006
	Changes from 8 to 16 years	− 3.2 (− 8.0, 1.6) p = 0.18	4.9 (− 0.3, 10.1) p = 0.06		− 8.1 (− 15.2, − 1.0) p = 0.03
FSIQ	8 years	100.6 (92.2, 108.9)	111.3 (102.9, 119.7)	− 10.7 (− 22.6, 1.2) p = 0.07
	16 years	95.8 (87.5, 104.1)	113.5 (104.9, 122.0)	− 17.7 (− 29.6, − 5.7) p = 0.006
	Changes from 8 to 16 years	− 4.8 (− 9.0, − 0.5) p = 0.03	2.2 (− 2.5, 6.8) p = 0.34		− 6.9 (− 13.2, − 0.7) p = 0.03
VCOMPIQ	8 years	106.5 (98.7, 114.2)	109.2 (101.3, 117.1)	− 2.8 (− 13.9, 8.4) p = 0.61
	16 years	100.5 (93.1, 108.0)	108.2 (100.2, 116.1)	− 7.6 (− 18.6, 3.3) p = 0.16
	Changes from 8 to 16 years	− 5.9 (− 13.6, 1.7) p = 0.12	− 1.0 (− 9.3, 7.2) p = 0.79		− 4.9 (− 16.1, 6.3) p = 0.38
PPVT	8 years	101.0 (90.3, 111.6)	113.6 (102.8, 124.4)	− 12.7 (− 27.9, 2.6) p = 0.10
	16 years	104.0 (93.5, 114.5)	117.5(106.8, 128.1)	− 13.5 (− 28.5, 1.6) p = 0.08
	Changes from 8 to 16 years	3.0 (− 4.1, 10.1) p = 0.39	3.8 (− 3.6, 11.3) p = 0.30		− 0.8 (− 11.1, 9.5) p = 0.87
RDRL_Cmp	8 years	–	–	–
	16 years	98.8 (82.1, 115.5)	100 (88.3, 111.7)	− 1.2 (− 13.2, 10.9) p = 0.84
	Changes from 8 to 16 years	–	–		–

The bolded values are the p-values that are significant (< 0.05).