create_block_ranges: Identify contiguous sleep episodes.

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

Identify contiguous sleep episodes.

Description

Identifies contiguous sleep episodes based on temporal gaps between valid sleep minutes. A new block is begins whenever the time difference between consecutive sleep records exceeds specified threshold. Function provides start and end times for each block and indicates whether they contain 'main' sleep.

Usage

create_block_ranges(exclusions_df, offset = "12:00", gap)

Arguments

exclusions_df	tbl. Data frame with columns is_slp, dtt, hrate_excluded, and main_slp.
offset	character. Time of day "HH:MM" used as the cutoff for defining the sleep day. Timestamps occuring after this time are assigned to the next day.
gap	numeric. Maximum allowed gap.

Value

tbl. A dataframe summarized at the sleep-block level, with the following columns:

• participant_id: participant identifier

• block_id: identifier for each sleep block

• block_start: Start timestamp of each continous sleep block.

• block_end: End timestamp of each continous sleep block.

• main_block: Logical indicator of whether the block contains any main sleep.

• duration_min: Duration of each sleep block in minutes.

• sleep_date: Sleep-aligned date based on specified offset.

Note

exclusions_df: output of identify_hr_exclusions() or identify_hr_recovery(); needs exclusion flags function is specific to extended framework input: offset sleep data with exclusion flags

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