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Table 1 Comparison of preterm infants receiving their first DTP-IPV-Hib immunization to control infants.

From: Frequency of apnea, bradycardia, and desaturations following first diphtheria-tetanus-pertussis-inactivated polio-Haemophilus influenzae type B immunization in hospitalized preterm infants

 

Immunized infants (n = 124)

Controls (n = 124)

Birth weight (grams)

893 (range 110–1730)

892 (range 110–1840)

Weight at immunization (grams)

2056 (range 1049–3220)

2085 (range 1054–3500)

Gestational age (weeks)

26 (range 23–31)

26 (range 23–32)

Postnatal age at immunization (days)

74 (range 58–125)

74 (range 56–120)

Male sex

58%

60%