correlational
Taking 3 grams of glycine before bed doesn't seem to change the overall structure of sleep stages
Scientific Claim
Glycine ingestion (3 g) before bedtime does not significantly alter sleep architecture in individuals with chronic unsatisfactory sleep, 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 uses 'without changes' which appropriately describes the lack of effect on sleep architecture. The language is appropriately correlational.
Evidence from Studies
No evidence studies found yet.