TABLE 4.

Clinical and Sociodemographic Factors Predicting Cumulative Hospital Inpatient Service Costs (£ UK 1998–1999) by Age 5 Determined by Simple Linear Regression (n = 239 694)

FactornMean CostSDRegression Coefficient (95% CI)P Value
Gestational age<.0001
 <28 wk50013 63919 33312 306 (11 957, 12 655)
 28–31 wk134614 05914 42912 727 (12 514, 12 940)
 32–36 wk11 728437864583045 (2971, 3119)
 ≥37 wk226 12013333540
Small for gestational age*<.0001
 Yes19 180270855451238 (1178, 1298)
 No219 80514703939
Year of birth<.0001
 1970–197563 22814715513161 (115, 207)
 1976–198157 53118203686509 (462, 556)
 1982–198755 03617633904452 (404, 499)
 1988–199363 89913113126
Gender*<.0001
 Male123 10017074810264 (230, 297)
 Female116 54814443372
Survival period<.0001
 <8 d999603583−941 (−1198, −684)
 8–28 d227405628192512 (1974, 3050)
 29 d–1 y727824113 8746697 (6396, 6998)
 1–5 y32113 83021 45112 286 (11 834, 12 738)
 >5 y237 42015444004
Maternal age at time of delivery*<.0001
 <20 y14 76720189583466 (396, 536)
 >35 y13 9831610375458 (−13, 130)
 20–35 y208 25015513537
Multiplicity of birth*<.0001
 Multiple5604394864172423 (2313, 2534)
 Singleton232 41415254098
Social class*<.0001
 Class II54 7961575386076 (14, 138)
 Class III89 52316915135192 (134, 249)
 Class IV22 01517073678208 (131, 285)
 Class V636319084974408 (289, 527)
 Class I29 56614992964
Maternal hospitalized days before birth*<.0001
 1–10 d112 73016704818281 (247, 316)
 11–20 d3899328159101893 (1759, 2026)
 ≥21 d2543371469252326 (2161, 2490)
 None114 95013883263
Infectious and parasitic diseases<.0001
 Present7741454882363068 (2974, 3161)
 Absent231 95314803930
Neoplasms<.0001
 Present1458545311 3103898 (3684, 4112)
 Absent238 23615554082
Endocrine, nutritional, and metabolic diseases<.0001
 Present1521801512 1086477 (6268, 6686)
 Absent238 17315384042
Diseases of the blood<.0001
 Present832738213 1335824 (5540, 6107)
 Absent238 86215594095
Mental and behavioral disorders<.0001
 Present44017 23853 84715 688 (15303, 16073)
 Absent239 25415503419
Diseases of the nervous system<.0001
 Present11 663479213 0483377 (3301, 3454)
 Absent228 03114153010
Diseases of the circulatory system<.0001
 Present64710 31814 5868763 (8442, 9083)
 Absent239 04715554086
Diseases of the respiratory system<.0001
 Present16 997415878172776 (2712, 2840)
 Absent222 69713823681
Diseases of the digestive system<.0001
 Present8483466996943203 (3114, 3293)
 Absent231 21114663776
Diseases of the genitourinary system<.0001
 Present6200356465652038 (1933, 2143)
 Absent233 49415264079
Diseases of skin and subcutaneous tissue<.0001
 Present3901316162281608 (1476, 1740)
 Absent235 79315534127
Diseases of the musculoskeletal system<.0001
 Present1337464781493085 (2861, 3309)
 Absent238 35715624135
Congenital anomalies<.0001
 Present22 214376410 4722408 (2351, 2465)
 Absent217 48013562733
Conditions of perinatal period<.0001
 Present105 647230954651305 (1272, 1338)
 Absent134 04710042622
Diseases of symptoms/ill-defined conditions<.0001
 Present12 999475788353360 (3288, 3433)
 Absent226 69513973652
Accidents, poisoning, violence<.0001
 Present11 945346970991989 (1913, 2065)
 Absent227 74914803937
  • SD indicates standard deviation.

  • * n < 239 694 because of an element of missing data for explanatory variable.