American Academy of Pediatrics

TABLE 3

Patient Characteristics in Preterm RCTs and Quasi-RCTs

Study	Oxygen Level	Gestational Age, wk	Male Sex, %	Birth Wt, g	Antenatal Steroid Administration, %	Cesarean Delivery, %	Intubation and Mechanical Ventilation, %	Chest Compressions, %
Lundstrøm et al²⁴
	Low	29 (25–32)^a	71	1043 (610–2590)^a	88	68	0	N/A
	High	29 (24–32)^a	61	1113 (550–1870)^a	86	81	0	N/A
Harling et al²⁵
	Low	27 (23–31)^a	42	1010 (518–1528)^a	100	39	N/A	N/A
	High	28 (24–30)^a	50	973 (560–1562)^a	100	50	N/A	N/A
Wang et al²⁶
	Low	28.1 (2.2)^b	39	1066 (368)^b	62	50	55	0
	High	27.6 (2.1)^b	39	1013 (444)^b	74	70	43	13
Vento et al²⁸
	Low	26.0 (1.5)^b	38	854.7 (170.1)^b	97	51	57	N/A
	High	26.3 (1.3)^b	44	901.7 (195.4)^b	93	59	61	N/A
Rabi et al²⁹
	Low	29 (28–30)^a	53	1242 (1092–1391)^a	85	N/A	29	N/A
	High	29 (28–30)^a	35	1231 (1091–1371)^a	85	N/A	26	N/A
Armanian and Badiee³⁰
	Low	Mean 32	N/A	Mean 1700	N/A	N/A	N/A	N/A
	High	Mean 30.8	N/A	Mean 1600	N/A	N/A	N/A	N/A
Kapadia et al³¹
	Low	30 (24–34)^a	48	1678 (634)^b	55	63	20	0
	High	30 (24–34)^a	55	1463 (6606)^b	48	73	39	0
Aguar et al³²
	Low	27.1 (1.6)^b	74	1013 (306)^b	100	65	N/A	N/A
	High	26.7 (1.5)^b	60	925 (174)^b	100	60	N/A	N/A
Rook et al³⁷
	Low	29 (27–30)^a	44	1013 (820–1280)^a	100	70	31	N/A
	High	29 (26–31)^a	46	1123 (790–1368)^a	100	65	30	N/A
Boronat et al³⁴
	Low	28 (24–32)^a	48	944 (720–1280)^a	100	68	N/A	N/A
	High	27 (23–31)^a	52	1040 (755–1368)^a	100	63	N/A	N/A
Oei et al⁵ (To2rpido)
	Low	28 (2)^b	55	1147 (363)^b	97	66	30	1
	High	28 (2)^b	50	1136 (321)^b	97	76	29	0
Thamrin et al³⁸ (To2rpido)
	Low	28 (2)^b	55	1147 (363)^b	97	66	30	1
	High	28 (2)^b	50	1136 (321)^b	97	76	29	0

Study	Oxygen Level	Gestational Age, wk	Male Sex, %	Birth Wt, g	Antenatal Steroid Administration, %	Cesarean Delivery, %	Intubation and Mechanical Ventilation, %	Chest Compressions, %
Lundstrøm et al²⁴
	Low	29 (25–32)^a	71	1043 (610–2590)^a	88	68	0	N/A
	High	29 (24–32)^a	61	1113 (550–1870)^a	86	81	0	N/A
Harling et al²⁵
	Low	27 (23–31)^a	42	1010 (518–1528)^a	100	39	N/A	N/A
	High	28 (24–30)^a	50	973 (560–1562)^a	100	50	N/A	N/A
Wang et al²⁶
	Low	28.1 (2.2)^b	39	1066 (368)^b	62	50	55	0
	High	27.6 (2.1)^b	39	1013 (444)^b	74	70	43	13
Vento et al²⁸
	Low	26.0 (1.5)^b	38	854.7 (170.1)^b	97	51	57	N/A
	High	26.3 (1.3)^b	44	901.7 (195.4)^b	93	59	61	N/A
Rabi et al²⁹
	Low	29 (28–30)^a	53	1242 (1092–1391)^a	85	N/A	29	N/A
	High	29 (28–30)^a	35	1231 (1091–1371)^a	85	N/A	26	N/A
Armanian and Badiee³⁰
	Low	Mean 32	N/A	Mean 1700	N/A	N/A	N/A	N/A
	High	Mean 30.8	N/A	Mean 1600	N/A	N/A	N/A	N/A
Kapadia et al³¹
	Low	30 (24–34)^a	48	1678 (634)^b	55	63	20	0
	High	30 (24–34)^a	55	1463 (6606)^b	48	73	39	0
Aguar et al³²
	Low	27.1 (1.6)^b	74	1013 (306)^b	100	65	N/A	N/A
	High	26.7 (1.5)^b	60	925 (174)^b	100	60	N/A	N/A
Rook et al³⁷
	Low	29 (27–30)^a	44	1013 (820–1280)^a	100	70	31	N/A
	High	29 (26–31)^a	46	1123 (790–1368)^a	100	65	30	N/A
Boronat et al³⁴
	Low	28 (24–32)^a	48	944 (720–1280)^a	100	68	N/A	N/A
	High	27 (23–31)^a	52	1040 (755–1368)^a	100	63	N/A	N/A
Oei et al⁵ (To2rpido)
	Low	28 (2)^b	55	1147 (363)^b	97	66	30	1
	High	28 (2)^b	50	1136 (321)^b	97	76	29	0
Thamrin et al³⁸ (To2rpido)
	Low	28 (2)^b	55	1147 (363)^b	97	66	30	1
	High	28 (2)^b	50	1136 (321)^b	97	76	29	0

N/A, not available (not collected in original study).

Reported as median (IQR).

Reported as mean (SD).