Variables | High ALP group (N = 52) | Low ALP group (N = 216) | p-value |
---|---|---|---|
Gender # | |||
  Male | 20 (38.5%) | 120 (55.6%) | 0.027 |
  Female | 32 (61.5%) | 96 (44.4%) | |
GA (weeks) @ | 28.0 (27.0–28.0) | 29.0 (28.0–31.0) |  < 0.001 |
BW (gm) @ | 955.0 (800.0–1400.0) | 1200.0 (850.0–1420.0) | 0.026 |
Length of NICU stay (days)+ | 28.0 (21.0–40.0) | 21.0 (15.0–26.0) |  < 0.001 |
Maternal parity level # | |||
  Low < 2 | 34 (65.4%) | 122 (56.5%) | 0.10 |
  Moderate 2–4 | 8 (15.4%) | 64 (29.6%) | |
  High > 4 | 10 (19.2%) | 30 (13.9%) | |
Serum ALP levels (units/L) | |||
Mean ± SD | 725.0 ± 143.8 | 273.6 ± 55.0 |  < 0.001 |
   ≤ 500 # | 0 (0.0%) | 216 (100.0%) |  < 0.001 |
   > 500 # | 52 (100.0%) | 0 (0.0%) | |
Serum phosphorus levels (mg/dl) ## | 2.6 ± 0.5 | 5.7 ± 0.6 |  < 0.001 |