climber_drugs | R Documentation |
Anonymous data was collected from urine samples at huts along the climb of Mont Blanc. Several types of drugs were tested, and proportions were reported.
climber_drugs
A data frame with 211 rows and 6 variables.
Idendification number of a specific urine sample.
Location where the sample was taken.
Substance detected to be present in the urine sample.
Amount of substance found measured in ng/ml.
Indicates that the concentration was determined by screening analysis.
Indicates that this substance was always detected concomitantly with the previous one, within the same urine sample.
PLOS One - Drug Use on Mont Blanc: A Study Using Automated Urine Collection
library(dplyr)
# Calculate the average concentration of each substance and number of occurrences.
climber_drugs |>
group_by(substance) |>
summarize(count = n(), mean_con = mean(concentration))
# Proportion samples in which each substance was detected.
climber_drugs |>
group_by(substance) |>
summarize(prop = n() / 154)
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