Primary study · included by 1 review

Trelstad 1977

ProbableThe reviews cited this study without a PMID, DOI or NCT, so it is matched by first author and year. Two different studies by the same author in the same year could be merged here.

Included by

Post-translational modifications of collagen type I in osteogenesis imperfecta: Systematic review and meta-analysis.

Non-Cochrane · other · 2026 · cited as Trelstad 1977 · Table 3; Supplementary material 2 (meta-analysis reference list)

Outcome this study informs	Pooled effect	Evidence	Certainty
Hydroxylysine (HYL) percentage in collagen-I OI collagen-I (patient-derived bone, fibroblast or dentine samples) vs Control (healthy) collagen-I	Normalized mean difference 0.09 [-0.01, 0.19]	3 studies · 62 participants	GRADE not reported
Hydroxylysine (HYL) percentage in collagen-I OI collagen-I (patient-derived bone, fibroblast or dentine samples) vs Control (healthy) collagen-I	Normalized mean difference 0.33 [0.21, 0.45]	20 studies · 150 participants	GRADE not reported
Hydroxylysine (HYL) percentage in collagen-I OI collagen-I (patient-derived bone, fibroblast or dentine samples) vs Control (healthy) collagen-I	Normalized mean difference 0.37 [0.26, 0.49]	17 studies · 88 participants	GRADE not reported

1 including review in total.