Association between Maoto Use and Hospitalization for Seasonal Influenza in a Nonelderly Cohort in Japan.

Abstract

Objective Maoto is a traditional Japanese Kampo formula used to treat influenza. However, clinical evidence for maoto has been limited to small-scale studies of its effect in alleviating symptoms. The present study evaluated whether or not the addition of maoto to a neuraminidase inhibitor was associated with a reduction in hospitalization following influenza. Methods Using the JMDC Claims Database, we identified outpatients <60 years old who were diagnosed with influenza by an antigen test from September 2013 to August 2018. One-to-five propensity score matching was conducted between patients who received maoto in addition to a neuraminidase inhibitor and those who received a neuraminidase inhibitor alone. Hospitalization within seven days of the influenza diagnosis was compared in the matched groups using the Mantel-Haenszel test. Results We identified 1.79 million cases of influenza from the database in the 5-year study period. Maoto was prescribed for 3.9% of the 1.67 million cases receiving a neuraminidase inhibitor. In the 64,613 propensity score-matched groups of patients, the 7-day hospitalization rate was 0.116% (n=75) for patients with maoto and 0.122% (n=394) for patients without maoto. The difference between these treatment groups was nonsignificant (common odds ratio, 0.95; 95% confidence interval, 0.74 to 1.22; p=0.695). Conclusion The addition of maoto to a neuraminidase inhibitor was not associated with a decrease in hospitalization among nonelderly patients with influenza. Further research is necessary to clarify the indication and efficacy of maoto.

• Authors: Hayato Yamana, Sachiko Ono, Nobuaki Michihata, Taisuke Jo, Hideo Yasunaga
• Journal: Internal medicine (Tokyo, Japan) (Intern Med) Vol. 60 Issue 21 Pg. 3401-3408 ( 2021) ISSN: 1349-7235 [Electronic] Japan
• PMID: 34719625 (Publication Type: Journal Article)

Chemical References

• Antiviral Agents
• Oseltamivir
• Neuraminidase

Topics

• Antiviral Agents (therapeutic use)
• Hospitalization
• Humans
• Influenza, Human (diagnosis, drug therapy, epidemiology)
• Japan (epidemiology)
• Medicine, Kampo
• Middle Aged
• Neuraminidase
• Oseltamivir (therapeutic use)
• Seasons