A 3‐month clinical trial was conducted to compare the effects of two concentrations of a chlorhexidine mouthrinse on gingivitis and plaque accumulation. Six hundred (600) adults were divided into three treatment groups matched for age, sex, and initial gingivitis severity. Following a thorough examination and prophylaxis at baseline, subjects were given a mouthrinse containing either 0.12% or 0.20% chlorhexidine gluconate or a placebo mouthrinse. Subjects were evaluated after 6 weeks and 3 months of mouthrinse use. After 3 months, both chlorhexidine groups showed significantly less gingivitis and plaque than the placebo group. The group using the 0.12% chlorhexidine gluconate mouthrinse demonstrated 27–27 % less gingivitis occurrence and 28–28% less gingivitis severity than the placebo group. The 0.12% chlorhexidine gluconate group also had 48–48% less gingival bleeding and 36% less plaque than the placebo group. There were no significant advantages for the 0.20% mouthrinse over the 0.12% mouthrinse. It is therefore concluded that a 0.12% chlorhexidine gluconate mouthrinse offers the same clinical benefits as a 0.20% chlorhexidine gluconate mouthrinse.
Introduction Passive data from smartphone sensors may be useful for health‐care research. Our aim was to use the coronavirus disease‐2019 (COVID‐19) pandemic as a positive control to assess the ability to quantify behavioral changes in people with amyotrophic lateral sclerosis (ALS) from smartphone data. Methods Eight participants used the Beiwe smartphone application, which passively measured their location during the COVID‐19 outbreak. We used an interrupted time series to quantify the effect of the US state of emergency declaration on daily home time and daily distance traveled. Results After the state of emergency declaration, median daily home time increased from 19.4 (interquartile range [IQR], 15.4‐22.0) hours to 23.7 (IQR, 22.2‐24.0) hours and median distance traveled decreased from 42 (IQR, 13‐83) km to 3.7 (IQR, 1.5‐10.3) km. The participant with the lowest functional ability changed behavior earlier. This participant stayed at home more and traveled less than the participant with highest functional ability, both before and after the state of emergency. Discussion We provide evidence that smartphone‐based digital phenotyping can quantify the behavior of people with ALS. Although participants spent large amounts of time at home at baseline, the COVID‐19 state of emergency declaration reduced their mobility further. Given participants' high level of daily home time, it is possible that their exposure to COVID‐19 could be less than that of the general population.
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