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For the abdominal luminance method, confidence is estimated based on how different the two correlation coefficients are.
Should the data be skewed then non-parametric bootstrap analysis using the percentile method confidence interval [ 26] will be undertaken and incremental net benefits estimated.
The endline survey collected information similar to the baseline: knowledge of DMPA's side effects, attitudes towards the method, confidence about the method, and professional practices.
The median probability of survival and median TTP were estimated by the Kaplan Meier method; confidence intervals (CIs) for response rates were calculated using methods for the exact binomial CI.
The specificity and sensitivity were calculated with Graph pad and further confirmed by SPSS 13.0 version where the receiver operating characteristic (ROC) curve; the area under the ROC curve was used as an index of test performance and calculated with a non-parametric method (confidence interval at 95%).
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For both methods, confidence interval coverage decreased with the level of population clustering (Figure 4).
If the normal, large sample approximation cannot be applied, consider exact binomial methods: confidence intervals are especially relevant for small samples.
To describe a method using confidence intervals (CIs) to estimate the sample size for a pilot randomized trial.
This method calculates confidence intervals for parameters.
mean difference, Standardized mean difference; IV, Inverse variance method; CI, Confidence interval.
Survival analysis was performed using the Kaplan Meier method including confidence limits.
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