Calculate sample size of a study

Trial concept calculated: sample size of the trial, preferring results-related over protocol-related information.

Usage

f.sampleSize(df = NULL)

Arguments

df

data frame such as from dbGetFieldsIntoDf. If `NULL`, prints fields needed in `df` for calculating this trial concept, which can be used with dbGetFieldsIntoDf.

Value

data frame with columns `_id` and `.sampleSize`, an integer.

Examples

# fields needed
f.sampleSize()
#> $euctr
#>  [1] "trialInformation.countrySubjectCounts.countrySubjectCount.subjects"
#>  [2] "f11_number_of_subjects_for_this_age_range"                         
#>  [3] "f1111_number_of_subjects_for_this_age_range"                       
#>  [4] "f1121_number_of_subjects_for_this_age_range"                       
#>  [5] "f1131_number_of_subjects_for_this_age_range"                       
#>  [6] "f1141_number_of_subjects_for_this_age_range"                       
#>  [7] "f1151_number_of_subjects_for_this_age_range"                       
#>  [8] "f1161_number_of_subjects_for_this_age_range"                       
#>  [9] "f121_number_of_subjects_for_this_age_range"                        
#> [10] "f131_number_of_subjects_for_this_age_range"                        
#> 
#> $ctgov
#> [1] "enrollment"
#> 
#> $ctgov2
#> [1] "protocolSection.designModule.enrollmentInfo.count"
#> 
#> $isrctn
#> [1] "participants.targetEnrolment"     "participants.totalFinalEnrolment"
#> 
#> $ctis
#> [1] "authorizedPartsII.recruitmentSubjectCount"                      
#> [2] "authorizedPartI.rowSubjectCount"                                
#> [3] "authorizedApplication.authorizedPartsII.recruitmentSubjectCount"
#> [4] "authorizedApplication.authorizedPartI.rowSubjectCount"          
#> 

if (FALSE) { # \dontrun{

# apply trial concept when creating data frame
dbc <- nodbi::src_sqlite(
  dbname = system.file("extdata", "demo.sqlite", package = "ctrdata"),
  collection = "my_trials", flags = RSQLite::SQLITE_RO)
trialsDf <- dbGetFieldsIntoDf(
  calculate = "f.sampleSize",
  con = dbc)
} # }