Primary study · included by 2 reviews

Iwasaki 2018

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

The Effect of Tobacco Smoking on Tooth Loss: A Systematic Review and Meta-Analysis.

Non-Cochrane · aetiology · 2026 · cited as Iwasaki 2018 · Fig. 2; Table 2

Outcome this study informs	Pooled effect	Evidence	Certainty
Tooth loss Current tobacco smoking vs Non-smoking or never smoking · Mean follow-up 9.3 years	RR 1.41 [1.24, 1.60]	5 studies · 64413 participants	Very low
Tooth loss Current tobacco smoking vs Non-smoking or never smoking	RR 1.51 [1.48, 1.55]	5 studies	GRADE not reported

Prevalence of xerostomia and hyposalivation in older adults: a systematic review and meta-analysis.

Non-Cochrane · prognostic · 2026 · cited as Iwasaki 2018 · Supplementary Appendix 3 (eReferences)

The review does not say which of its outcomes this study informs.

2 including reviews in total.