Table 1. Parent-reported Child Health Questionnaire at 10 and 18 years in EP- and term-born children.

Boys				Girls
Age at follow-up:	10 years (n = 26)	18 years (n = 22)		10 years (n = 44)	18 years (n = 38a)
CHQ-PF50 scales	Estimated mean difference (95% CI) EP vs. term-born	Estimated mean difference (95% CI) EP vs. term-born	Tests of interaction group by age p-valuesb	Estimated mean difference (95% CI) EP vs. term-born	Estimated mean difference (95% CI) EP vs. term-born	Tests of interaction group by age p-valuesb
Physical functioning	−7.9(−15.7, −0.2)	−2.3(−10.9, 6.3)	0.33	−2.3(−6.3, 1.8)	−5.4(−9.8, −0.9)	0.31
Role/social- emotional/behavioral	−23.9(−42.2, −5.7)	−8.4(−28.5, 11.8)	0.25	−4.0(−11.5, 3.4)	−3.8(−11.9, 4.3)	0.96
Role/social-physical	−10.3(−19.8, −0.7)	−4.4(−15.0, 6.2)	0.56	−0.8(−7.6, 6.1)	−1.1(−8.6, 6.4)	0.95
Bodily pain	−8.5(−22.6, 5.7)	−6.8c(-23.1, 9.5)	0.96	−2.7(−15.2, 9.8)	−3.9c(−17.8, 9.9)	0.89
Behavior	−24.2(−37.7, −10.6)	−7.8(−22.7, 7.2)	0.11	−6.4(−13.4, 0.6)	−4.8(−12.5, 2.9)	0.76
Mental health	−8.8(−18.3, 0.6)	−0.5(−11.0, 9.9)	0.24	−3.9(−8.8, 1.1)	−7.0(−12.5, −1.6)	0.39
Self-esteem	−8.3(−19.8, 3.1)	11.3(−1.6, 24.1)	0.03	−5.5(−13.6, 2.6)	−7.5(−16.4, 1.3)	0.74
General health	−27.8(−39.2, −16.5)	−7.5(−20.2, 5.2)	0.02	−17.2(−26.3, −8.2)	−11.2(−21.2, −1.3)	0.38
Parental impact- emotional	−35.3(−52.9, −17.6)	−11.7(−31.3, 7.8)	0.08	−12.5(−20.3, −4.7)	−8.0(−16.6, 0.6)	0.44
Parental impact-time	−21.4(−31.9, −10.8)	−3.8(−15.6, 8.1)	0.03	−7.1(−12.3, −1.8)	−2.1(−7.8, 3.7)	0.21
Family activity	−23.1(−38.6, −7.5)	−2.8(−20.2, 14.6)	0.09	−6.7(−14.6, 1.2)	−5.5(−14.2, 3.2)	0.84
Family cohesion	−2.3(−16.9, 12.3)	5.1(−11.3, 21.5)	0.50	−3.2(−13.1, 6.8)	−0.6(−11.5, 10.3)	0.73

Notes.

EP

extremely preterm

Higher scores in each of the CHQ scales reflect better outcome (range 0–100).

^aOne report was missing.

^bFrom mixed linear model: interaction-term testing if development from 10 to 18 years differed in the EP vs. the term-born group.

^cOne missing.