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Table 2 Estimates of prevalence, intraclass correlation coefficients, their respective 95% CI, design effect, and mean cluster size for variables related to the process

From: Intraclass correlation coefficients in the Brazilian network for surveillance of severe maternal morbidity study

Variable

P (%)

ICC

95% CI for ICC

DEFF

na

· Prenatal care at the same institution

22.1

0.103

0.033−0.174

44.72

316

· Access of women to the center (Spontaneous demand)

47.9

0.195

0.078−0.312

118.12

333

· Major type of healthcare insurance used for prenatal care (Public)

88.5

0.115

0.039−0.191

30.27

279

· Major type of healthcare insurance used for hospital admission (Public)

98.9

0.508

0.323−0.693

31.66

354

Procedure related to abortion

     

· Procedure performed: D&C

77.8

0.054

0.001−0.148

1.50

9

· Procedure performed: Oxytocin

33.3

0.339

0.136−0.542

9.39

9

· Procedure performed: Vacuum aspiration

7.0

0.001

<0.001−0.068

2.26

9

· Procedure performed: Prostaglandins

22.2

0.118

<0.001−0.245

1.91

9

· Procedure performed: Other

7.0

0.155

0.011−0.298

1.53

9

Related to PLTC criteria

     

· Any therapeutic management

76.1

0.272

0.125−0.419

225.19

354

· Transfusion of blood derivatives

16.4

0.079

0.024−0.133

37.50

354

· Central venous access

3.8

0.090

0.028−0.151

21.23

354

· Admission to ICU

22.1

0.288

0.136−0.439

199.58

354

· Prolonged hospital stay

30.0

0.098

0.032−0.164

81.88

354

· Intubation unrelated to anesthesia

3.1

0.047

0.013−0.081

12.99

354

· Return to operating room

3.3

0.021

0.005−0.038

11.75

354

· Hysterectomy/laparotomy

6.2

0.043

0.011−0.074

20.44

354

· Use of magnesium sulfate

48.3

0.363

0.192−0.534

292.63

354

· Another major surgical procedure

0.8

0.008

0.001−0.016

6.35

354

Related to near miss criteria

     

· Any management near miss criteria

6.1

0.075

0.023–0.127

20.52

354

· Continuous use of vasoactive drug

2.6

0.028

0.007–0.049

8.93

354

· Hysterectomy due to infection or hemorrhage

1.8

0.031

0.008–0.054

8.05

354

· Transfusion of ≥5 U red cells

2.6

0.053

0.015–0.091

11.42

354

· Intubation and ventilation ≥ 60 min unrelated to anesthesia

3.1

0.047

0.013–0.082

13.94

354

· Dialysis for acute renal failure

0.7

0.009

0.001−0.017

3.60

354

· Cardiopulmonary resuscitation (CPR)

1.3

0.018

0.004–0.033

8.41

354

· At least one of these conditions was already present when the woman was admitted

32.0

0.132

0.046–0.218

6.91

34

Related to delay in care

     

· Delay related to patients and/or their family members (Yes/No)

39.3

0.090

0.028−0151

27.26

310

· Search for a health service

5.3

0.174

0.067–0.281

54.03

310

· Geographic difficulty in accessing health service

2.4

0.352

0.183–0.520

113.16

310

· Refused treatment/care

5.1

0.014

0.002–0.025

7.72

310

· Prenatal care absent or inadequate

32.1

0.043

0.012–0.075

14.98

310

· Delay in care related with health professional

17.3

0.328

0.164−0.492

134.27

331

· Delay in diagnosis

5.5

0.218

0.091–0.346

72.81

331

· Delay in starting treatment

6.7

0.321

0.159–0.483

105.23

331

· Inadequate management

13.6

0.300

0.144–0.456

121.82

331

· Delay in referring or transferring the case

3.3

0.055

0.015–0.095

20.77

331

  1. P: Prevalence of each category; ICC: Intraclass Correlation Coefficient; 95% CI: 95% confidence interval; DEFF: Design effect; na: Mean cluster size; PLTC: Potentially life-threatening condition; NM: Near miss.