
This study from the INHANCE collaboration pooled data from 12 case-controlled studies. Long-term use (35 yrs) of mouthwash was associated with an increase risk OR=1.15 (95%CI; 1.01 to 1.30) of head and neck cancer but with regular (>2 x daily), long-term (>35 years) use OR = 1.75 (95%CI; 1.25 to 2.48).
[read the full story...]