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Table 5 Estimates of prevalence, intraclass correlation coefficients, their respective 95% CI, design effect and mean cluster size with respect to the variables related to structure

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

Variable P (%) ICC 95% CI for ICC DEFF na
· Delay related to service or healthcare system 15.6 0.247 0.108−0.387 106.64 328
· Lack of medication 1.3 0.021 0.005–0.038 9.77 328
· Difficulties with municipal/hospital transport 1.3 0.031 0.007–0.055 9.27 328
· Difficulties with communication (hospital/central regulation) 8.8 0.206 0.083–0.329 99.07 328
· Lack of blood derivatives 0.6 0.014 0.002–0.025 8.17 328
· Difficulty related to monitoring (intensive care unit) 4.6 0.230 0.097–0.363 64.99 328
· Lack of trained personnel 3.1 0.063 0.018–0.107 24.25 328
· Difficulty related to access to prenatal care 1.4 0.084 0.025–0.142 20.09 328
  1. P: Prevalence of each category; ICC: Intraclass Correlation Coefficient; 95% CI: 95% confidence interval; DEFF: Design effect; na: Mean cluster size.