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Table 1 Demographic and obstetric characteristics

From: Temporal patterns in count-to-tenfetal movement charts and their associations with pregnancy characteristics: a prospective cohort study

  Study group, n= 1086 Østfold Hospital, year 2009#, n= 3212 Relative risk (RR) p//
n (%)** n (%)** RR (95% CI)  
MATERNAL CHARACTERISTICS
  Maternal age, years [mean, SD] 30.7 [4.7] 29.2 [5.2]   
  Maternal age ≥ 35 years 196 (18.0) 544 (16,9) 1.1 (0.9-1.2) 0.400
  Maternal BMI, kg/m2, [mean, SD] 24.8 [5.1] Not available - -
  Maternal obesity (BMI ≥ 30 kg/m2) 155 (14.3) Not available - -
  Primiparity 574 (52.9) 1370 (42.7) 1.2 (1.2-1.3) <0.001
  Daily/occasionally smoking 1.trimester 93 (8.5) 673 (21.0) 0.4 (0.3-0.5) <0.001
  Anterior placental site 479 (44.1) Not available - -
DELIVERY MODE
  Vaginal deliveries 905 (83.3) 2545 (78.3) 1.1 (1.0-1.1) <0.001
    Induced vaginal deliveries 182 (20.1) 304 (11.9) 1.7 (1.4-2.0) <0.001
    Assisted vaginal delivery 131 (14.5) 282 (11.1) 1.3 (1.1-1.6) 0.006
  Cesarean sections (CS), total 181 (16.7) 706 (21.6) 0.8 (0.7-0.9) <0.001
    Emergency CS 117 (64.6) 442 (62.6) 1.0 (0.9-1.7) 0.552
CHARACTERISTICS OF THE NEWBORNS AND BIRTH OUTCOME
  Gestational age, weeks [mean,SD] 39.6 [1.6] 39.2 [1.9]   
  Male gender 562 (51.7) 1726 (52.7) 1.0 (0.9-1.1) 0.588
  Birth weight in grams [mean, SD] 3584 [524] 3492 [623] - -
  Low birth weight (<2500gr) 27 (2.5) 147 (4.5) 0.6 (0.4-0.9) 0.006
  Stillbirth [> 22 weeks, per 1000] 3 [2.7/1000] 8 [2.4/1000]   
  Preterm (220-366 weeks) 52 (4.8) 213 (6.6) 0.7 (0.5-1.0) 0.031
  Apgar score <75min 16 (1.5) 55 (1.7) 0.9 (0.5-1.5) 0.642
  1. # Data from Medical Birth Registry of Norway (MBRN) ( http://mfr-nesstar.uib.no/mfr/ , Des 19. 2011), year 2009 was latest available complete update and is used as reference, denominator varies between subgroups – denominator reflects number of deliveries (n=3212) or number of infants (n=3275).
  2. // Chi-square test for categorical data.
  3. ** Number and proportion unless other is specified in the left column.
  4. The table presents demographic and obstetric characteristics and birth outcome of the total population of pregnant women in Østfold Hospital and for the women included in the analyses.