Table 2

Clinical and PET data for infants with RDS

No		Weight (g)		Gestational age (weeks)		Race		Sex		Age at scan 1 (h)		Surfactant	a:A ratio2-150		Radiography	PTCER (10⁻⁴/min)
No		Weight (g)		Gestational age (weeks)		Race		Sex		Age at scan 1 (h)		Surfactant	Scan 1	Scan 2	Radiography	Scan 1	Scan 2
15	1000	26	B	M	3	N	0.59	0.26	Moderate	125	80
16	930	27	W	F	8	N	2-151	2-151	Mild	147	119
17	1020	29	W	M	13	N	2-151	2-151	Mild	71	61
18	1495	30	B	F	10	N	0.26	0.26	Mild	121	130
19	2400	35	W	F	17	N	2-151	2-151	Mild	146	2-152
20	2450	35	W	M	7	N	0.35	0.66	Mild	71	149
21	2600	35	W	M	14	N	0.19	0.18	Severe	161	162
22	940	27	W	M	9	Y	0.49	0.46	Mild	225	192
23	1420	31	W	F	8	Y	0.14	0.45	Severe	142	216
24	2178	35	W	F	21	Y	0.18	0.31	Moderate	103	174
25	2800	35	W	F	18	Y	0.13	0.29	Severe	129	2-152
26	2735	36	W	M	22	Y	0.16	0.36	Moderate	145	219
Mean (SD)	1.8 (0.8) kg	32 (4)			12 (6)		0.28 (0.16)	0.36 (0.14)		132 (39)	160 (45)

↵2-150 a:A ratio = arterial-alveolar oxygen ratio: P_aO₂/[FiO₂(713)−P_aCO₂].
↵2-151 Arterial blood gases not available.
↵2-152 Only one scan performed.
CXR = chest radiograph - mild disease, granular appearance - moderate disease, air bronchograms - severe disease, opacification of lung field.