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Table 1 Characteristics, obstetrical history and type of health care providers among participants at their first contact with the health care service. Percentages (absolute figures within brackets), odds ratio (OR) and 95% confidence intervals (95%CI) for those who chose combined prenatal screening test for foetal anomalies in the Childbirth and Health Study, Iceland

From: Use of pregnancy ultrasound before the 19th week scan: an analytical study based on the Icelandic Childbirth and Health Cohort

 

All (Number)

%

Combined prenatal screening test at week 11–14

%

OR

95%CI

p-value

Total

1111

 

78.3 (862/1101)

 

Parity at study entry

 Primipara

439

39.5 (439/1110)

82.3 (359/436)

1

Ref.

 

 Multipara

671

60.5 (671/1110)

75.6 (503/665)

0.67

0.49–0.90

.009

Education

 Primary (10 years)

123

11.1 (123/1109)

73.0 (89/122)

0.53

0.34–0.83

.006

 Secondary (4 years)

291

26.2 (291/1109)

67.9 (195/287)

0.42

0.30–0.58

.009

 Higher (total > 14 years)

695

62.7 (695/1109)

83.5 (577/691)

1

Ref.

 

Age (years)

 18–24

186

16.7 (186/1111)

75.0 (138/184)

0.39

0.23–0.69

.001

 25–34

733

66.0 (733/1111)

76.5 (557/728)

0.43

0.27–0.69

<.001

  > 35

192

17.3 (192/1111)

88.4 (168/190)

1

Ref.

 

Region

 Urban

763

68.7 (763/1110)

86.5 (656/758)

1

Ref.

 

 Rural

347

31.3 (347/1110)

60.1 (206/343)

0.23

0.17–0.32

<.001

I have tried to become pregnant for more than one year

 Yes

147

13.3 (147/1106)

83.0 (122/147)

1

Ref.

 

 No

959

86.7 (959/1106)

77.6 (737/950

0.71

0.45–1.12

.140

Assisted pregnancy such as in vitro fertilization or artificial insemination

 Yes

67

6.1 (67/1106)

85.1 (57/67)

1

Ref.

 

 No

1039

93.9 (1039/1106)

77.9 (802/1030)

0.62

0.31–1.23

.168

Type of health care provider as first contact in pregnancy

 Midwife

320

29.1 (320/1110)

71.3 (228/320)

1

Ref.

 

 General practitioner

129

11.7 (129/1110)

72.9 (94/129)

1.08

0.69–1.71

.730

 Gynaecologist

609

55.4 (609/1110)

83.3 (507/609)

2.01

1.45–2.77

<.001

 Others

42

3.8 (42/1110)

76.2 (32/429)

1.29

0.61–2.73

.504