Table 1 Characteristics of 45 extremely preterm subjects, with or without disability, and 46 term-born controls who were born in 1982–1985 in western Norwaya
| Â | EP-born severe disability | EP-born healthy | Term-born controls | p-valueb | p-valuec |
|---|---|---|---|---|---|
Birth characteristics | n = 8 | n = 37 | n = 46 | – | – |
 Male, n (%) | 5 (62.5) | 22 (55.0) | 26 (56.5) | 1.000 | 0.826 |
 Gestational age, weeks, mean (SD) | 26.9 (2.0) | 27.5 (1.7) | – | – | – |
 Birth weight, grams, mean (SD) | 917 (164) | 1017 (194) | 3441 (311) |  < 0.001 |  < 0.001 |
 Age first follow-up, year, mean (SD) | 17.1 (1.6) | 17.1 (1.1) | 17.4 (1.3) | 0.711 | 0.318 |
 Age 2nd follow-up, year, mean (SD) | 24.3 (1.7) | 24.2 (1.2) | 24.6 (1.3) | 0.546 | 0.111 |
 Age 3rd follow-up, year, mean (SD) | 34.7 (1.6) | 34.2 (1.3) | 34.4 (1.3) | 0.706 | 0.656 |
 BPD moderate/severe, n (%) | 2 (15.4) | 11 (84.6) | 0 | – | – |
Neurosensory impairments, n (%) | Â | Â | Â | Â | Â |
 Disabling CP, n (%) | 4 (50.0) | 0 | 0 | – | – |
 Non-disabling CP, n (%) | 2 (25.0) | 4 (10.3) | 0 | – | – |
 Deaf, n (%) | 2 (25.0) | 0 | 0 | – | – |
 Blind, n (%) | 2 (25.0) | 0 | 0 | – | – |
Characteristics at 34 years follow-up | n = 6 | n = 28 | n = 36 |  |  |
 Highest educational attainment, n (%) |  |  |  | 0.395 | 0.436 |
  College/University, ≤ 4 years | 5 (83.3) | 20 (71.4) | 22 (61.1) |  |  |
  College/University, > 4 years | 1 (16.7) | 8 (28.6) | 14 (38.9) |  |  |
 Employment, n (%) |  |  |  | 0.007 | 0.159 |
  Working or still in education | 3 (50.0) | 24 (85.7) | 35 (97.2) |  |  |
  Unemployed or disability pension | 3 (50.0) | 4 (14.3) | 1 (2.8) |  |  |
 Martial status 34 years, n (%) |  |  |  |  < 0.001 | 0.112 |
  Single | 6 (100) | 8 (28.6) | 4 (11.4) |  |  |
  Married/cohabitant | 0 | 20 (71.4) | 31 (88.6) |  |  |
 Having children, n (%) | 0 | 17 (61.0) | 25 (69.0) | 0.002 | 0.002 |