Table 3. Association of IVF conception with school performance and long-term outcome in very preterm children
Variable	OR	95% CI	p value
Repeated grade	0.45	0.11 - 2.49	0.36
Learning difficulties	0.63	0.17 - 2.33	0.49
Extra lessons	0.74	0.19 - 2.76	0.65
Special education need	2.93	0.27 - 30.8	0.37
ADHD	2.56	0.48 - 13.4	0.26
Autism	2.14	0.11 - 57.4	0.65
Visual impairment	1.12	0.27 - 4.34	0.90
Hearing impairment	3.25	0.27 - 38.7	0.35
Impaired gross motor function	1.12	0.53 - 23.6	0.92
IVF: in vitro fertilization,OR: odds ratio,CI: confidence interval.ADHD: attention deficit hyperactivity disorder.