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Table 10 Estimates of prevalence (P), intracluster correlation coefficients (ICC), their respective 95% CI, design effect (Deff), and mean cluster size (n a ) for diagnosis and management among categorical variables related to therapeutic preterm delivery

From: Intracluster correlation coefficients for the Brazilian Multicenter Study on Preterm Birth (EMIP): methodological and practical implications

Variable

P(%)

ICC

95% CI for ICC

Deff

na

Therapeutic delivery for maternal disease

74.6

0.102

0.032-0.172

9.6

73

Therapeutic delivery for fetal disease

54.1

0.065

0.016-0.115

7.0

73

Maternal disease responsible for interruption of pregnancy:

   ● Diabetes

7.3

0.063

0.011-0.115

5.5

54

   ● Gestational hypertension

12.9

0.144

0.048-0.240

9.4

54

   ● Chronic hypertension

15.3

0.009

<0.001-0.027

1.8

54

   ● Preeclampsia

58.2

0.079

0.017-0.140

5.4

54

   ● Eclampsia

3.2

0.017

<0.001-0.041

1.8

54

   ● HELLP syndrome

9.4

0.012

<0.001-0.031

1.2

54

   ● Abruptio placentae

7.7

0.009

<0.001-0.026

1.6

54

   ● Previous placentae

3.3

0.001

<0.001-0.013

0.8

54

Fetal disease responsible for interruption of pregnancy:

   

   ● Fetal distress

32.6

0.052

0.010-0.095

6.1

71

   ● Fetal growth restriction

19.8

0.037

0.004-0.069

4.4

71

   ● Malformation

5.2

0.144

0.052-0.236

13.5

71

   ● Other fetal condition

15.1

0.161

0.061-0.262

15.8

71

Exams to evaluate fetal condition:

     

   ● Cardiotocography

61.0

0.299

0.148-0.451

23.7

67

   ● Dopplerfluxometry

61.1

0.159

0.059-0.260

14.4

67

   ● Fetal biophysical profile

32.2

0.508

0.331-0.686

43.5

67

   ● Fetal movements control

4.3

0.101

0.030-0.172

12.3

67

   ● Other exam

12.9

0.041

0.005-0.077

4.1

67

Determinant exams for diagnosis:

     

   ● Cardiotocography

23.2

0.104

0.032-0.176

10.1

70

   ● Dopplerfluxometry

29.8

0.064

0.014-0.113

6.4

70

   ● Fetal biophysical profile

14.6

0.290

0.142-0.438

24.0

70

   ● Fetal echocardiography

1.2

0.030

0.001-0.058

4.6

70

   ● Maternal hepatic dysfunction

15.9

0.194

0.079-0.308

19.9

70

   ● Maternal hematologic dysfunction

21.0

0.278

0.134-0.423

29.9

70

   ● Other

41.2

0.102

0.031-0.173

10.0

70

Maternal or fetal attempted treatment

57.9

0.056

0.012-0.101

5.7

71

Use of corticosteroids

42.6

0.059

0.012-0.105

6.2

70

Maternal condition at hospital discharge (cured)

24.8

0.153

0.057-0.249

15.7

73

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BMC Medical Research Methodology

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