Table 1 Survival of Very Low Birth Weight infants
Location | Weight (Main inclusion criteria) | Time Period | Number of babies | Survival | Factors associated with survival of babies | Reference |
|---|---|---|---|---|---|---|
Texas | VLBW | 1977 1995 | Â | 50% 81% | Number of babies offered mechanical ventilation; Black females survival advantage | [3] |
Israel | VLBW | 1985-87 | 69 | 70% | Â | [4] |
Italy | VLBW ELBW | 1987-1988 | 634 | 77% 44% | Lower Birth weight or gestational age, Gender, No antenatal steroids, 1 minute Apgar, No spontaneous respiration in delivery room, body temperature/pH on admission | [5] |
Malaysia | VLBW | 1989-1990 | 329 | 40% | Lower birth weight/gestational age | [6] |
Netherlands | VLBW | 1983 1995 | 1388 2006 | 75% 90% | Delivery in tertiary centre, prolonged artificial ventilation, Caesarean delivery | [7] |
Taiwan | VLBW | 1995-1998 | 162 | 78.4% | Â | [8] |
South America | VLBW | 1997-1998 | 385 (11 neonatal units) | 73% (49-89%) | Birth weight, gestational age, No antenatal steroids, air leaks | [9] |
Sofia (Bulgaria) | VLBW ELBW | 1998-1999 | 122 61 | 86% 54% | Birth weight, gestational age, low Apgar scores, Cord Ph < 7.1, Need for cardiac compressions/adrenaline in delivery room | [10] |
New Zealand | VLBW | 1986 1998 | 413 1084 | 81% 90.3% | Delivery in tertiary centre, No antenatal steroids | [11] |
Thailand | VLBW ELBW | 1996 | 613 | 76% 49% | Gestational age, birth weight, delivery room resuscitation, Pneumothorax | [12] |
East Anglia (England) | VLBW | 1993-1997 | 1244 | 75-79% | Gestational age, Birth weight, No antenatal steroids | [13] |
USA (NICHD) | VLBW | 1995-1996 1997-2002 | Â | 84% 85% | Â | [14] |
Turkey | VLBW | 1997-2002 | 122 | 84% | Birth Weight | [15] |
Spain | VLBW | 2002 2005 | 8942 | 80.6% 84.8% | Outborn, birthweight | [16] |
India | VLBW | 3 years (not stated) | 260 | 63% | Birth weight, gestational age, maternal bleed, 1 minute Apgar, apnoea, neonatal septicaemia, shock, hypothermia, no antenatal steroids | [17] |
Brazil | VLBW | 2004/5 | 579 (16 tertiary units) | 84% (69-95%) | Gestational age, maternal hypertension, 5 minute Apgar, respiratory distress, place of birth | [18] |
Malaysia | VLBW | 1993 2003 | 69 60 | 62,3% 81,6% | Â | [19] |
Thailand | VLBW ELBW | 2002/3 | 78 | 81% 52% | Birth weight, gestational age, congenital anomalies, No antenatal steroids, 5 minute Apgar, intubation in delivery room, respiratory distress syndrome | [20] |
Jamaica | ELBW | 2002/3 | 47 | 43% | Gestational age, birth weight, gender, No antenatal steroids, Caesarean delivery | [21] |
South Africa | VLBW ELBW | 2000-2002 | 2164 | 71% 32% | Birth weight, 1 & 5 minute Apgars, Caesarean delivery, antenatal care, gender | [22] |