Table 3.

Rates and Relative Risks of Death before Assessment at 18 to 22 Months or Neurodevelopmental Impairment at 18 to 22 Months of Corrected Age in the Lower-Oxygen-Saturation and Higher-Oxygen-Saturation Groups.^*

Variable	Lower Oxygen Saturation	Higher Oxygen Saturation	Adjusted Relative Risk (95% CI)	P Value
number/total number (percent)
Primary outcome determined	612/654 (93.6)	622/662 (94.0)	1.00 (0.97–1.03)	0.79
Death or NDI	185/612 (30.2)	171/622 (27.5)	1.12 (0.94–1.32)	0.21
Death before assessment at 18–22 mo of corrected age	140/633 (22.1)	118/648 (18.2)	1.25 (1.00–1.55)	0.046
NDI	45/472 (9.5)	53/504 (10.5)	0.87 (0.60–1.28)	0.49
BSID-III cognitive score <70	34/471 (7.2)	38/503 (7.6)	0.91 (0.58–1.43)	0.69
GMFCS score ≥2	26/479 (5.4)	23/511 (4.5)	1.17 (0.68–2.01)	0.56
Moderate or severe cerebral palsy	20/479 (4.2)	20/511 (3.9)	1.00 (0.54–1.83)	>0.99
Bilateral blindness	5/479 (1.0)	6/511 (1.2)	0.90 (0.28–2.90)	0.86
Hearing impairment	12/479 (2.5)	12/511 (2.3)	1.16 (0.54–2.49)	0.70

^*Relative risks and P values were adjusted for stratification factors (study center and gestational-age group) and familial clustering; analyses of blindness were not adjusted for study center, owing to the small number of patients with this characteristic.