correlational
Taking 3 grams of glycine before bed doesn't seem to change the overall structure of sleep stages, based on sleep monitoring equipment.
Scientific Claim
Ingestion of 3 grams of glycine before bedtime is associated with no significant changes in sleep architecture in individuals with chronic sleep dissatisfaction, as measured by polysomnography.
Original Statement
“Glycine improved subjective sleep quality and sleep efficacy (sleep time/in-bed time), and shortened PSG latency both to sleep onset and to slow wave sleep without changes in the sleep architecture.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study design supports the statement of no change in sleep architecture, and the language 'without changes' is appropriately neutral and correlational.
Evidence from Studies
No evidence studies found yet.