TABLE 3

The Frequency of Laboratory Abnormalities on Admission (N = 40) and at 1 Year of Age (N = 38) in Infants With Rectal Bleeding

AbnormalityOn Admission, n (%)Age 1 y, n (%)
Anemia (Hb < 105 g/L)7 (18)1 (3)
Thrombocytosis (>450 × 109/L)26 (65)5 (13)
Eosinophilia (>5% of leukocytes)12 (30)0 (0)
Increased erythrocyte sedimentation rate (>15 mm/h)3 (8)6 (16)
Increased C-reactive protein concentration (>10 mg/L)2 (5)1 (3)
Low serum albumin (<36 g/L)8 (20)2 (5)
High plasma sodium concentration (>145 mmol/L)1 (3)0 (0)
High plasma potassium concentration (>4.8 mmol/L)7 (18)0 (0)