View source: R/f_numTestArmsSubstances.R
f.numTestArmsSubstances | R Documentation |
Trial concept calculated: number of active arms with different investigational medicines, after excluding comparator, auxiliary and placebo arms / medicines. For ISRCTN, this is imprecise because arms are not identified in a field. Most registers provide no or only limited information on phase 1 trials, so that this number typically cannot be calculated for these trials. Requires packages stringdist to be installed; stringdist is used for evaluating names of active substances, which are considered similar when the similarity is 0.8 or higher.
f.numTestArmsSubstances(df = NULL)
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. |
data frame with columns '_id' and '.numTestArmsSubstances', an integer
# fields needed
f.controlType()
## Not run:
# 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.numTestArmsSubstances",
con = dbc)
## End(Not run)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.