Table 1.

Subject Characteristics

Gestational Age at Birth
<2828–3233–36>36Overall
No. of subjects33423030135
Mean birth weight (g)851  ± 2231419  ± 4102253  ± 3783449  ± 4381920  ± 1024
Mean 5-minute Apgar6.7  ± 2.27.5  ± 1.67.8  ± 1.28.0  ± 1.17.5  ± 1.6
No. girls/boys18/1518/2415/1510/2045/55%
No. white/black14/1929/1315/1413/1653/47%
No. with IVH (none/grades I–II/grades III–IV)15/12/623/10/928/2/028/1/170/19/11%
Mean days on oxygen71  ± 4920  ± 293  ± 63  ± 525  ± 40
Mean days on mechanical ventilation39  ± 2910  ± 172  ± 41  ± 413  ± 23
No. studies conducted with opiates (yes/no)25/29723/1821/766/63 8/92%
No. studies conducted with caffeine (yes/no)63/25933/1720/770/6914/86%
Mean length of stay82  ± 4039  ± 2614  ± 88  ± 537  ± 38
No. of studies performed3232058169678
Mean no. of procedures* during stay766  ± 648223  ± 34456  ± 7144  ± 72279  ± 471
  • * Procedures included aerosol rx, arterial stick, c-pap bagging, broviac, bath, cardiac catheterization, circumcision, code, chest tube insertion, physical exam, extubation, eye exam, gavage tube insertion, injection, intubation, intravenous insertion (IV), lumbar puncture (LP), nose culture, percutaneous cerebral venous catheter, postural drainage, arterial catheterization, heelstick, suctioning, surgery, urine catheterization, ultrasound, venipuncture, and wound care.