Table 2 The survival rate of extremely low birth weight (ELBW) infants at discharge from 2008 to 2017.

From: Short term outcomes of extremely low birth weight infants from a multicenter cohort study in Guangdong of China

Discharged year

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

p-value

ELBW infants, n

91

102

114

237

210

244

308

340

463

466

BW (grams), median (IQR)

900 (800, 965)

895 (785, 945)

893 (800, 950)

900 (800, 945)

900 (824, 960)

917 (821, 965)

900 (800, 950)

900 (800, 959)

880 (790, 950)

870 (780, 940)

Survival, n (%)

38 (41.76)

48 (47.06)

56 (49.12)

110 (46.41)

110 (52.38)

136 (55.74)

164 (53.25)

195 (57.35)

273 (58.96)

289 (62.02)

 < 0.001*

Died under active treatment, n (%)

13 (14.29)

14 (13.73)

17 (14.91)

39 (16.45)

23 (10.95)

27 (11.07)

57 (18.51)

61 (17.94)

77 (16.63)

60 (12.88)

Died after treatment withdrawal, n (%)

40 (43.96)

40 (39.22)

41 (35.96)

88 (37.13)

77 (36.67)

81 (33.20)

87 (28.25)

84 (24.71)

113 (24.41)

117 (25.11)

  1. *Chi-square test linear-by-linear association. ELBW: Extremely low birth weight; IQR: Interquartile range.