Comparison of frequency-domain and continuous-wave near-infrared spectroscopy devices during the immediate transition

Table 1 Demographics and clinical data

	CW-NIRS (n = 58)	FD-NIRS (n = 38)	P-value
Female sex	30 (52%)	14 (37%)	0.22
Gestational age (weeks)	34 ⁰/₇ [32 ⁴/₇–35 ⁶/₇]	32 ²/₇ [31 ⁴/₇–34 ¹/₇]	< 0.01
Birthweight (g)	2066 [1172–2366]	1763 [1480–2011]	0.01
Birthweight for age SDS^a	−0.3 [− 1.0–0.2]	−0.2 [− 0.8–0.6]	0.50
Head circumference (cm)	32.0 [31.0–33.0]	29.5 [28.0–31.8]	< 0.01
Head circumference for age SDS^b	0.0 [0.0–1.0]	0.4 [− 0.8–0.9]	0.91
Arterial umbilical cord pH	7.31 [7.28–7.34]	7.29 [7.26–7.34]	0.39
Apgar
Minute 1	8.5 [8–9]	8 [7–8]	0.02
Minute 5	9 [8–10]	9 [8–9]	0.12
Minute 10	10 [9–10]	9 [9–10]	0.25
Caesarean section	58 (100%)	27 (71%)	< 0.01
Respiratory support	34 (59%)	25 (66%)	0.62
Reanimation¹	2 (3%)	0 (0%)	0.39
SGA²	7 (12%)	7 (18%)	0.57

Values are median [IQR] or n (%); SGA Small for gestational age. ^a Birthweight-for-age SDS and ^bHead circumference-for-age SDS were calculated according to Fenton et al. (ref) ¹unknown in n = 1 from CW-NIRS group; ² unknown in n = 1 from CW-NIRS group

ISSN: 1471-2431