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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