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Table 4 Odds Ratios (95% CI) for maternal factors related to emergency and elective Caesarean sections, Scotland 1980-2000

From: The influence of both individual and area based socioeconomic status on temporal trends in Caesarean sections in Scotland 1980-2000

 

EMERGENCY

 

1980-81

1990-91

1999-2000

 

Maternal factors

Model SC+AD

Maternal factors

Model SC+AD

Maternal factors

Model SC+AD

Maternal age

      

<20

1

1

1

1

1

1

20-24

1.37 (1.25-1.51)

1.39 (1.27-1.53)

1.44 (1.30-1.59)

1.45 (1.31-1.60)

1.61 (1.44-1.79)

1.61 (1.45-1.80)

25-29

1.74 (1.58-1.92)

1.80 (1.63-1.99)

1.89 (1.71-2.09)

1.93 (1.75-2.13)

2.36 (2.12-2.62)

2.38 (2.13-2.65)

30-34

2.31 (2.07-2.57)

2.42 (2.17-2.71)

2.44 (2.19-2.71)

2.52 (2.26-2.81)

3.11 (2.80-3.47)

3.14 (2.81-3.51)

35-39

3.56 (3.08-4.10)

3.74 (3.23-4.32)

3.30 (2.91-3.75)

3.43 (3.02-3.91)

4.19 (3.72-4.72)

4.23 (3.74-4.78)

≥40

5.91 (4.69-7.44)

6.18 (4.90-7.79)

5.00 (4.04-6.19)

5.22 (4.21-6.47)

4.84 (4.01-5.83)

4.88 (4.04-5.91)

Maternal height

      

<155 cm

1

1

1

1

1

1

155 cm-164 cm

0.50 (0.47-0.53)

0.51 (0.48-0.54)

0.57 (0.54-0.61)

0.58 (0.54-0.61)

0.64 (0.59-0.69)

0.64 (0.60-0.69)

>164 cm

0.30 (0.28-0.33)

0.31 (0.29-0.33)

0.36 (0.34-0.39)

0.37 (0.34-0.40)

0.43 (0.39-0.46)

0.43 (0.40-0.46)

Parity

      

0

1

1

1

1

1

1

1

0.39 (0.37-0.42)

0.39 (0.36-0.41)

0.35 (0.33-0.37)

0.34 (0.33-0.36)

0.33 (0.31-0.35)

0.33 (0.31-0.35)

2

0.26 (0.23-0.28)

0.25 (0.23-0.28)

0.21 (0.19-0.23)

0.21 (0.19-0.23)

0.20 (0.18-0.22)

0.20 (0.18-0.22)

3+

0.23 (0.20-0.26)

0.22 (0.19-0.25)

0.18 (0.16-0.21)

0.18 (0.16-0.21)

0.21 (0.19-0.24)

0.21 (0.18-0.24)

Marital status

      

Married

1

1

1

1

1

1

Single

0.94 (0.85-1.04)

0.91 (0.83-1.01)

0.88 (0.82-0.93)

0.85 (0.80-0.91)

1.06 (1.00-1.13)

1.06 (1.00-1.13)

Other

1.29 (1.12-1.48)

1.26 (1.09-1.44)

1.03 (0.94-1.14)

1.01 (0.92-1.11)

1.11 (1.03-1.19)

1.10 (1.03-1.18)

Gestational age

      

<37 wks

1

1

1

1

1

1

37 wks-40 wks

0.56 (0.51-0.62)

0.56 (0.51-0.62)

0.28 (0.26-0.30)

0.28 (0.26-0.30)

0.30 (0.28-0.33)

0.30 (0.28-0.33)

>40 wks

0.74 (0.66-0.82)

0.74 (0.67-0.83)

0.43 (0.40-0.47)

0.44 (0.40-0.47)

0.48 (0.44-0.52)

0.48 (0.44-0.52)

 

ELECTIVE

 

1980-81

1990-91

1999-2000

 

Maternal factors

Model SC+AD

Maternal factors

Model SC+AD

Maternal factors

Model SC+AD

Maternal age

      

<20

1

1

1

1

1

1

20-24

1.78 (1.48-2.14)

1.78 (1.49-2.14)

1.37 (1.08-1.74)

1.37 (1.08-1.74)

1.88 (1.39-2.54)

1.85 (1.37-2.50)

25-29

2.40 (1.99-2.88)

2.42 (2.01-2.91)

2.07 (1.64-2.62)

2.08 (1.64-2.63)

2.77 (2.07-3.71)

2.68 (2.00-3.60)

30-34

3.51 (2.90-4.24)

3.55 (2.92-4.31)

2.72 (2.14-3.45)

2.74 (2.16-3.48)

3.63 (2.71-4.87)

3.46 (2.58-4.66)

35-39

6.09 (4.93-7.51)

6.17 (4.99-7.62)

3.78 (2.94-4.85)

3.81 (2.96-4.91)

4.96 (3.68-6.68)

4.67 (3.46-6.32)

≥40

10.2 (7.76-13.4)

10.32 (7.86-13.6)

5.52 (4.05-7.52)

5.57 (4.08-7.61)

6.37 (4.56-8.88)

5.99 (4.28-8.37)

Maternal height

      

<155 cm

1

1

1

1

1

1

155 cm-164 cm

0.45 (0.42-0.48)

0.45 (0.42-0.49)

0.43 (0.40-0.47)

0.43 (0.40-0.47)

0.57 (0.51-0.63)

0.56 (0.51-0.62)

>164 cm

0.31 (0.28-0.34)

0.31 (0.28-0.34)

0.28 (0.25-0.31)

0.28 (0.25-0.31)

0.42 (0.38-0.46)

0.41 (0.37-0.45)

Parity

      

0

1

1

1

1

1

1

1

1.91 (1.76-2.08)

1.91 (1.75-2.08)

4.25 (3.85-4.68)

4.24 (3.84-4.67)

4.25 (3.84-4.71)

4.30 (3.88-4.76)

2

1.56 (1.41-1.73)

1.55 (1.40-1.72)

4.21 (3.77-4.70)

4.20 (3.76-4.70)

4.26 (3.80-4.79)

4.35 (3.87-4.90)

3+

0.90 (0.78-1.03)

0.89 (0.77-1.02)

2.19 (1.88-2.54)

2.17 (1.87-2.53)

2.83 (2.44-3.27)

2.94 (2.53-3.41)

Marital status

      

Married

1

1

1

1

1

1

Single

0.78 (0.65-0.94)

0.78 (0.65-0.94)

0.77 (0.69-0.86)

0.77 (0.68-0.86)

0.71 (0.65-0.79)

0.74 (0.67-0.82)

Other

0.99 (0.82-1.19)

0.99 (0.82-1.19)

0.88 (0.78-1.00)

0.88 (0.77-1.00)

0.92 (0.83-1.01)

0.94 (0.85-1.03)

Gestational age

      

<37 wks

1

1

1

1

1

1

37 wks-40 wks

0.38 (0.34-0.42)

0.38 (0.34-0.42)

0.68 (0.60-0.77)

0.68 (0.60-0.77)

1.10 (0.95-1.27)

1.09 (0.94-1.26)

>40 wks

0.14 (0.12-0.16)

0.14 (0.12-0.16)

0.13 (0.11-0.16)

0.13 (0.11-0.16)

0.17 (0.14-0.21)

0.17 (0.14-0.21)

  1. Maternal factors - adjusts for maternal age, maternal height, parity, gestational age and marital status, only
  2. Model SC+AD - additionally adjusts for both social class and area deprivation