GRANMO Sample size and Power Calculator
PROPORTIONS: Two independent proportions
PROPORTIONS: Observed versus a reference proportion
PROPORTIONS: Paired measurements (repeated in one group)
PROPORTIONS: Bioequivalence
PROPORTIONS: Population Estimate
PROPORTIONS: Odds Ratio (Case-Control studies)
PROPORTIONS: Relative Risk (Cohort studies)
PROPORTIONS: Power Calculation
PROPORTIONS: Two independent proportions by cluster
MEANS: Two independent means
MEANS: Paired means (in one group)
MEANS: Observed versus a reference mean
MEANS: Paired means (in two groups)
MEANS: Population Estimate
MEANS: One-Way Analysis of Variance
MEANS: Power Calculation
MEANS: Two independent means by cluster
OTHER: Survival analysis(Log-rank Test)
OTHER: Correlation Coefficient
OTHER: Kappa for a binary outcome
OTHER: Intraclass Correlation Coefficient
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Alpha Risk
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Test
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Power
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Confidence level
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| Group 1 proportion | |
| Group 2 proportion | |
| Group 2 size/Group 1 size ratio | |
| Drop-out rate |
| Null hypothesis proportion | |
| Minimum expected difference | |
| Drop-out rate |
| Proportion in first assessment | |
| Proportion in second assessment | |
| Drop-out rate |
| Proportion of reference | |
| Minimum expected difference | |
| Drop-out rate |
| Reference population size | |
| Expected proportion | |
| Desired precision of confidence level | |
| Item substitution rate |
| Proportion of exposed in controls | |
| Minimum expected Odds Ratio | |
| Number Controls/Number Cases Ratio | |
| Drop-out rate |
| Event rate in Non-Exposed | |
| Minimum expected Relative Risk | |
| Non-Exposed/Exposed ratio | |
| Drop-out rate |
| Group 1 proportion | |
| Group 2 proportion | |
| Group 1 sample size | |
| Group 2 sample size |
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Clusters available per group
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People available per cluster
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| Expected mean proportion in non-exposed | |
| Expected mean proportion in exposed | |
| Drop-out rate |
| Group 2 size/Group 1 size ratio | |
| Common standard deviation | |
| Minimum expected difference | |
| Drop-out rate |
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Estimated standard deviation of differences
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Standard deviation of the first measure
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Standard deviation of the second measure
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Correlation between measures, first group compared to second group
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| Minimum meaningful difference | |
| Drop-out rate |
| Common standard deviation | |
| Minimum expected difference | |
| Drop-out rate |
| Common standard deviation | |
| Mean difference between groups | |
| Drop-out rate | |
| Correlation between first and second measurements | |
| Group 2 size/Group 1 size ratio |
| Reference population size | |
| Estimated standard deviation | |
| Desired precision of confidence level | |
| Item substitution rate |
| Number of groups | |
| Common standard deviation | |
| Minimum expected difference between at least in one pair of groups | |
| Drop-out rate |
| Common standard deviation | |
| Group 1 mean | |
| Group 2 mean | |
| Group 1 sample size | |
| Group 2 sample size |
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Clusters available per group
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People available per cluster
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| Standard deviation within clusters | |
| Difference of means between exposed and non exposed | |
| Drop-out rate |
| Ratio between Exposed group size / Non-exposed group size | |
| Incidence rate in Non-Exposed group | |
| Desired Hazard ratio | |
| Drop-out rate |
| Pearson's correlation coeficient estimation | |
| Drop-out rate |
| Proportion of positive result by first rater | |
| Proportion of positive result by second rater | |
| Expected Kappa value | |
| Minimum acceptable Kappa value | |
| Drop-out rate |
| Expected ICC | |
| Null hypothesis ICC | |
| Number of ratings per subject |
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