Primary study · included by 1 review

Relationship of smoking and smoking cessation with number of teeth present: JPHC Oral Health Study*.

Yanagisawa 2009 · Yanagisawa T, Marugame T, Ohara S, et al. · Oral diseases · 2009

Included by

Non-Cochrane · aetiology · 2026 · cited as Yanagisawa 2009 · Reference list; Figures 2 and 3

Outcome this study informs	Pooled effect	Evidence	Certainty
Tooth loss Past (former) tobacco smoking vs Non-smoking or never smoking · Mean follow-up 13 years	RR 1.21 [1.07, 1.37]	2 studies · 35522 participants	Very low
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 Past (former) tobacco smoking vs Non-smoking or never smoking	RR 1.18 [1.13, 1.23]	2 studies	GRADE not reported
Tooth loss Current tobacco smoking vs Non-smoking or never smoking	RR 1.51 [1.48, 1.55]	5 studies	GRADE not reported

1 including review in total.