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. Author manuscript; available in PMC: 2007 Feb 1.
Published in final edited form as: Early Hum Dev. 2006 Feb 3;82(2):85–95. doi: 10.1016/j.earlhumdev.2006.01.001

Table 3.

Estimates of the Reduction in Neonatal Costs Associated with 1 Week Increases in Gestational Age: Mean, Median, and Ranges. Estimated From 1998–2000 California Data.

Gestational Age (completed weeks) To 25 Weeks (US $) To 26 Weeks (US $) To 27 Weeks (US $) To 28 Weeks (US $) To 29 Weeks (US $) To 30 Weeks (US $) To 31 Weeks (US $) To 32 Weeks (US $) To 33 Weeks (US $) To 34 Weeks (US $) To 35 Weeks (US $) To 36 Weeks (US $) To 37 Weeks (US $)
24 −10,975
9,812
(−237,613, 180,308)		 14,926
30,165
(−192,293, 176,143)		 44,483
66,510
(−154,151, 196,614)		 76,442
94,186
(−114,282, 225,410)		 106,762
128,146
(−71,727, 247,299)		 129,681
148,740
(−41,935, 262,648)		 154,117
167,715
(−11,930, 274,437)		 176,446
184,198
(13,773, 286,033)		 192,418
196,586
(31,493, 294,768)		 212,028
214,851
(52,447, 306,832)		 216,556
215,967
(60,859, 306,926)		 219,118
216,138
(64,052, 306,968)		 220,536
216,223
(64,396, 307,002)
25 25,901
20,353
(−130,553, 171,709)		 55,458
56,697
(−92,412, 192,180)		 87,417
84,374
(−52,543, 220,977)		 117,737
118,334
(−9,987, 242,865)		 140,657
138,928
(19,804, 258,215)		 165,092
157,903
(49,809, 270,004)		 187,421
174,386
(75,512, 281,599)		 203,393
186,773
(93,232, 290,334)		 223,003
205,039
(114,186, 302,399)		 227,531
206,155
(122,598, 302,492)		 230,094
206,326
(125,791, 302,534)		 231,511
206,410
(126,135, 302,568)
26 29,557
36,345
(−88,246, 146,859)		 61,517
64,021
(−48,377, 175,656)		 91,836
97,981
(−5,822, 197,544)		 114,756
118,575
(23,970, 212,894)		 139,192
137,550
(53,975, 224,683)		 161,520
154,034
(79,678, 236,278)		 177,492
166,421
(97,397, 245,013)		 197,103
184,686
(118,352, 257,078)		 201,631
185,802
(126,763, 257,171)		 204,193
185,973
(129,957, 257,213)		 205,611
186,058
(130,301, 257,247)
27 31,959
27,676
(−68,849, 137,514)		 62,279
61,637
(−26,293, 159,402)		 85,199
82,230
(3,499, 174,752)		 109,635
101,206
(33,503, 186,541)		 131,963
117,689
(59,207, 198,137)		 147,935
130,076
(76,926, 206,871)		 167,546
148,341
(97,880, 218,936)		 172,073
149,457
(106,292, 219,029)		 174,636
149,629
(109,486, 219,072)		 176,053
149,713
(109,830, 219,106)
28 30,320
33,960
(−55,090, 119,533)		 53,239
54,554
(−25,298, 134,883)		 77,675
73,529
(4,707, 146,672)		 100,004
90,012
(30,410, 158,268)		 115,976
102,399
(48,129, 167,003)		 135,586
120,665
(69,084, 179,067)		 140,114
121,781
(77,496, 179,161)		 142,676
121,952
(80,689, 179,203)		 144,094
122,036
(81,033, 179,237)
29 22,920
20,594
(−47,186, 92,328)		 47,356
39,569
(−17,181, 104,117)		 69,684
56,052
(8,522, 115,712)		 85,656
68,439
(26,241, 124,447)		 105,267
86,705
(47,196, 136,512)		 109,794
87,821
(55,607, 136,605)		 112,357
87,992
(58,801, 136,647)		 113,774
88,076
(59,145, 136,681)
30 24,436
18,975
(−32,531, 74,325)		 46,764
35,458
(−6,828, 85,921)		 62,737
47,845
(10,891, 94,655)		 82,347
66,111
(31,846, 106,720)		 86,875
67,227
(40,258, 106,813)		 89,437
67,398
(43,451, 106,856)		 90,855
67,483
(43,795, 106,890)
31 22,329
16,483
(−18,617, 55,916)		 38,301
28,870
(−898, 64,651)		 57,911
47,136
(20,057, 76,715)		 62,439
48,252
(28,469, 76,809)		 65,001
48,423
(31,662, 76,851)		 66,419
48,507
(32,006, 76,885)
32 15,972
12,387
(−12,493, 38,947)		 35,583
30,652
(8,461, 51,012)		 40,110
31,768
(16,873, 51,105)		 42,673
31,940
(20,067, 51,148)		 44,090
32,024
(20,411, 51,182)
33 19,610
18,265
(−274, 33,292)		 24,138
19,381
(8,138, 33,386)		 26,701
19,553
(11,332, 33,428)		 28,118
19,637
(11,676, 33,462)
34 4,528
1,116
(−3,926, 12,432)		 7,090
1,287
(−733, 12,474)		 8,508
1,372
(−389, 12,508)

Infants with a birth weight <500g and infants with a gestational age that was inconsistent with birth weight were deleted.

Costs converted to December 2003 levels by the U.S. Consumer Price Index.