TABLE 2

Characteristics of Infants and Their Mothers Who Accepted and Declined Vitamin K Prophylaxis in Alberta, 2006 to 2012

CharacteristicsnIM/Oral Vitamin K,an(%)Declined Vitamin K, n(%)P Value
Mother’s age, y<.001
 <2461 81861 683(99.78)135(0.22)
 25–34175 736175 137(99.66)599(0.34)
 35+44 82444 652(99.62)172(0.38)
First-time delivery<.001
 No161 547160 963(99.64)584(0.36)
 Yes120 831120 509(99.73)322(0.27)
First Nationsb<.001
 No261 496260 612(99.66)884(0.34)
 Yes20 88220 860(99.89)22(0.11)
Site of birth<.001
 Hospital280 055279 407(99.77)648(0.23)
 Birth center224200(89.29)24(10.71)
 Planned home birth14861270(85.46)216(14.54)
 Othersc613595(97.06)18(2.94)
Primary attendant at birth<.001
 Physician272 754272 212(99.80)542(0.20)
 Midwife46994381(93.23)318(6.77)
 Nurse and others30903046(98.58)44(1.42)
Delivery<.001
 Vaginal delivery, no epidural101 329100 674(99.35)655(0.65)
 Vaginal delivery with epidural106 565106 446(99.89)119(0.11)
 Cesarean delivery74 48474 352(99.82)132(0.18)
Infant health status at birthd<.001
 Term, no NICU admission249 059248 236(99.67)823(0.33)
 Term with NICU admission17 74017 707(99.81)33(0.19)
 Preterm, no NICU admission85718552(99.78)19(0.22)
 Preterm with NICU admission70026971(99.56)31(0.44)
Smoking during pregnancy<.001
 No223 631222 799(99.63)832(0.37)
 Yes48 00347 954(99.90)49(0.10)
  • Missing data: primary attendant at birth (n = 1835, 0.6%), infant health (n = 6, 0.002%), and maternal smoking (n = 10 744, 3.8%).

  • a The small number of infants receiving oral vitamin K (n = 1126) was combined with those receiving IM vitamin K for this analysis.

  • b First Nations: the largest aboriginal group in Canada.

  • c Others: primarily unplanned home births, also births occurring en route to hospital (eg, in vehicle).

  • d Infant health status: preterm birth (gestational age <37 wk); term (≥37 wk); NICU admission.