evidencegaps
Primary study · included by 1 review

Effect of non-surgical treatment on gingival bleeding in smokers and non-smokers.

Preber 1986 · Preber H, Bergström J · Acta odontologica Scandinavica · 1986

Included by

Impact of Traditional and Alternative Nicotine-Containing Product Use on Non-Surgical Periodontal Therapy: A Systematic Review and Network Meta-Analysis.
Non-Cochrane · intervention · 2026 · cited as Preber 1986 · Supplementary Table S1; Reference 72

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

1 including review in total.