create_session_num: Creates a new column by converting session_id column into a...

In ABCDscores: Summary Scores of the Adolescent Brain Cognitive Development (ABCD) Study

Creates a new column by converting session_id column into a numeric

Description

Creates a new column which contains the parsed numeric value for the visit. Annual visits are set to integers, where 0 = baseline, 1 = year 1, and so on. Mid-years are defined as 0.5 increments of the prior annual visits, e.g., 0.5 = between baseline and year 1, 1.5 = between year 1 and 2, and so on.

Usage

create_session_num(data, name = "session_num")

Arguments

data	tbl. Data frame containing the session_id column.
name	character of length 1. The name of the newly created and appended column. Default: session_num

Value

tbl. The input data frame with the name column added.

Examples

# Example data
dat <- tibble::tibble(
  participant_id = c("A123", "A123", "A123", "A123"),
  session_id = c("ses-00S", "ses-00A", "ses-00M", "ses-01A"),
  a = c(1, 2, 3, 4),
  b = c(10, 11, 12, NA)
)

# Create a new column (default: `session_num`) with numeric session
create_session_num(
  dat
)

# Create a new column called `num` that contains the session numbers
create_session_num(
  dat,
  name = "num"
)

ABCDscores documentation built on Nov. 12, 2026, 1:07 a.m.