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Table 1 Characteristics of 8 RCTs and baseline characteristics of patients

From: Noninvasive high-frequency oscillatory ventilation as respiratory support in preterm infants: a meta-analysis of randomized controlled trials

Study Study design Group N Male (n) GA (wk) BW (g) Antenatal steroid Surfactant (n) Caffeine (n)
Bottino 2018 [20] Randomized controlled crossover trial nHFOV 15 NA < 32 < 1500 NA 15 15
nCPAP 15 NA < 32 < 1500 NA 15 15
Klotz 2017 [16] Randomized controlled crossover trial nHFOV 13 2 26.1 (2.2)* 814.2 (208.2)* 13 13 13
nCPAP 13 9 27.2 (2.0)* 1083.5 (359.1)* 13 13 13
Lou 2017 [21] Randomized controlled trial nHFOV 34 24 32.5 (1.3)* 1790 (350)* 13 34 NA
nCPAP 31 22 32.4 (1.4)* 1850 (410)* 12 21 NA
Lou 2018 [22] Randomized controlled trial nHFOV 33 18 33.5 (1.5)* 1790 (330)* 12 33 NA
BPCPAP 32 17 34.2 (1.6)* 1840 (420)* 11 32 NA
Malakian 2018 [23] Randomized controlled trial nHFOV 63 28 31.08 (2.9)* 1485.5 (470)* 36 21 NA
nCPAP 61 25 31.07 (2.8)* 1505.5 (490)* 31 23 NA
Mukerji 2017 [24] Randomized controlled trial nHFOV 16 1 26.1 (1.3)* 831.9 (150.1)* 12 10 NA
BPCPAP 23 2 26.5 (1.6)* 878.0 (198.3)* 20 14 NA
Zhu 2017 [25] Randomized controlled trial nHFOV 37 22 31.7 (1.7)* 1670 (353)* 13 37 NA
nCPAP 39 21 32.0 (1.9)* 1735 (327)* 15 39 NA
Zhu 2017 [26] Randomized controlled trial nHFOV 17 10 31.7 (1.7)* 1670 (353)* 6 17 NA
nCPAP 21 12 32.0 (1.9)* 1735 (327)* 8 21 NA
  1. NA Not Applicated, BW: Birth weight, *means ±SD