TABLE 3.

Survival per GA, Time Period, and Region of Delivery (Live Births/Survivors [%]).

GA (Weeks)1985–19891990–19941995–19991990–1999
NorthSouthNorthSouthNorthSouthNorthSouth
227/1 (14)12/0 (0)10/1 (10)16/2 (13)8/1 (13)18/1 (6)18/2 (11)34/3 (9)
2330/7 (23)38/3 (8)30/7 (23)49/7 (14)34/14 (41)*44/7 (16)64/21 (33)93/14 (15)
2428/8 (29)72/20 (28)62/30 (48)131/29 (22)46/32 (70)*77/38 (49)108/62 (57)208/67 (32)
2554/22 (41)127/47 (37)70/42 (60)199/94 (47)89/76 (85)181/108 (60)159/118 (74)380/202 (53)
2665/48 (74)218/121 (56)116/84 (72)291/202 (69)65/52 (80)217/179 (82)181/136 (75)508/381 (75)
2797/74 (76)264/185 (70)141/114 (81)346/272 (79)88/76 (86)262/221 (84)229/190 (83)608/493 (81)
22–25119/38 (32)249/70 (28)172/80 (47)395/132 (33)177/123 (69)320/154 (48)349/203 (58)715/286 (40)
26–27162/122 (75)482/306 (63)257/198 (77)637/474 (74)153/128 (84)479/400 (84)410/326 (80)1116/874 (78)