. Author manuscript; available in PMC: 2017 Feb 25.

Published in final edited form as: J Perinatol. 2016 Aug 25;36(11):966–971. doi: 10.1038/jp.2016.131

Table 2.

Severe ROP regression models - FTOE

20% threshold
	Wald Z statistic	P value	VIF
EGA	−2.20	0.03^*	1.95
BW centile	−1.14	0.25	1.95
Male sex	0.29	0.77	2.18
Caucasian race	1.09	0.28	1.38
Complete antenatal steroid treatment	1.83	0.06	2.03
Antenatal magnesium exposure	0.82	0.41	2.05
Vaginal delivery	−1.91	0.05^*	2.52
Inotrope exposure	2.24	0.02^*	2.48
BPD	0.36	0.71	1.00
Mean % FiO2	−1.33	0.18	3.29
Hyperoxia burden	1.45	0.15	2.55
Model: R²=0.70, p<0.01^*
15% threshold
	Wald Z statistic	P value	VIF
EGA	−2.40	0.02^*	1.97
BW centile	−1.09	0.28	2.21
Male sex	0.41	0.68	2.05
Caucasian race	1.55	0.12	1.32
Complete antenatal steroid treatment	1.79	0.07	2.13
Antenatal magnesium exposure	0.95	0.34	1.92
Vaginal delivery	−1.98	0.05^*	2.76
Inotrope exposure	2.28	0.02^*	2.59
BPD	0.42	0.67	1.00
Mean % FiO2	−1.39	0.16	4.08
Hyperoxia burden	2.02	0.04^*	2.66
Model: R²=0.73, p<0.01^*
10% threshold
	Wald Z statistic	P value	VIF
EGA	−2.49	0.01^*	2.31
BW centile	−1.14	0.25	2.22
Male sex	−0.33	0.74	1.90
Caucasian race	1.56	0.11	1.28
Complete antenatal steroid treatment	1.82	0.06	2.44
Antenatal magnesium exposure	0.88	0.37	2.08
Vaginal delivery	−2.05	0.04^*	2.27
Inotrope exposure	2.36	0.02^*	2.58
BPD	0.43	0.66	1.00
Mean % FiO2	−1.27	0.20	3.26
Hyperoxia burden	2.12	0.03^*	2.82
Model: R²=0.74, p<0.01^*

Denotes significance at p ≤ 0.05.