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Table 5 Associations between socio-demographic, obstetric and organisational characteristics and outcome (midwife catching the baby)

From: The role of hospital midwives in the Netherlands

  Nulliparae Multiparae
  1998-2002 2003-2007 1998-2002 2003-2007
Characteristics OR* multivariable OR* multivariable
  (95% CI # ) (95% CI # )
referral     
   - before the onset of labour (reference) 1.00 1.00 1.00 1.00
   - during labour 1.23 (1.18-1.28) 1.02 (0.99-1.05) 1.54 (1.48-1.60) 1.12 (1.08-1.16)
process of birth     
   - spontaneous, no induction, no augmentation (reference) 1.00 1.00 1.00 1.00
   - induction 0.74 (0.70-0.77) 0.78 (0.75-0.81) 0.78 (0.75-0.81) 0.83 (0.80-0.86)
   - augmentation 0.81 (0.77-0.84) 0.80 (0.77-0.82) 0.79 (0.76-0.83) 0.79 (0.76-0.82)
   - vacuum/forceps/CS 0.01 (0.01-0.02) 0.03 (0.03-0.03) 0.01 (0.01-0.01) 0.01 (0.01-0.01)
time of birth     
   - weekday 8.00-20.00 (reference) 1.00 1.00 1.00 1.00
   - evening, night of weekend 0.83 (0.80-0.86) 0.71 (0.70-0.73) 0.82 (0.80-0.85) 0.75 (0.73-0.77)
Maternal age     
   - < 25 1.03 (0.98-1.07) 1.05 (1.02-1.08) 0.97 (0.91-1.03) 1.02 (0.97-1.08)
   - 25-< 35 (reference) 1.00 1.00 1.00 1.00
   - ≥ 35 0.96 (0.91-1.03) 0.93 (0.89-0.97) 0.99 (0.95-1.02) 0.95 (0.92-0.98)
Ethnicity     
   - western (reference) 1.00 1.00 1.00 1.00
   - non-Western 1.16 (1.10-1.22) 1.07 (1.03-1.11) 1.23 (1.19-1.28) 1.04 (1.01-1.08)
Gestational age     
   - < 32 weeks 0.24 (0.21-0.28) 0.20 (0.18-0.22) 0.24 (0.21-0.28) 0.24 (0.21-0.27)
   - 32-< 37 weeks 0.59 (0.55-0.62) 0.63 (0.61-0.66) 0.57 (0.54-0.61) 0.61 (0.58-0.64)
   - 37-< 42 weeks (reference) 1.00 1.00 1.00 1.00
   - ≥ 42 weeks 1.12 (1.04-1.19) 1.19 (1.13-1.25) 1.12 (1.06-1.19) 1.21 (1.15-1.27)
Type of hospital     
   - academic 8.62 (8.01-9.28) 2,12 (2,02-2,21) 8,80 (8.46-9.52) 3.29 (3.16-3.43)
   - teaching (reference) 1.00 1.00 1.00 1.00
   - non-teaching 8.21 (8.02-9.28) 3.50 (3.41-3.60) 7.55 (7.18-7.94) 4.09 (3.97-4.21)
  1. * OR = Odds Ratio, via multivariable logistic regression analysis (adjusted for the characteristics mentioned above and year of birth).
  2. #95% CI = 95% Confidence Interval. If this interval does not include the value 1, the factor has a statistically significant effect on outcome