BACKGROUND: Use of complementary and alternative medicine (CAM) has become popular in Japan.
OBJECTIVE: To investigate associations of symptom-related CAM use with sociodemographic factors in Japan.
DESIGN AND SETTING: A prospective cohort study of a nationally representative sample of households in Japan.
PARTICIPANTS: Community-dwelling adults who developed at least one symptom during a 31-day period.
MAIN OUTCOME MEASURES: Self-reported, symptom-related use of CAM, either physical CAM or oral CAM.
RESULTS: Of 2, 453 adults, 2, 103 participants (86%) developed at least one symptom. Of these symptomatic adults, 156 (7.4% ; 95% CI: 6.3-8.5%) used physical CAM therapy. The likelihood of using physical CAM was not significantly influenced by annual household income, employment, or education. Participants living in large cities had an increased likelihood of using physical CAM with an odds ratio (OR) of 2.6 (95% CI: 1.2-5.8), compared to those living in rural areas. Oral CAM therapy was used by 480 participants (22.8%; 95% CI: 21.0-24.6%) among the symptomatic adults. An age of 60 years old and older (OR 2.0; 95% CI: 1.2-3.3) and female gender (OR 1.8; 95% CI: 1.3-2.6) were significantly associated with an increased use of oral CAM. The unemployed participants had a lower likelihood of using oral CAM, with an OR of 0.6 (95% CI: 0.4-0.9), compared to the employed.
CONCLUSIONS: Oral CAM use is common among Japanese patients and is associated with older age, female gender, and employed status, while physical CAM use is less common and is associated with living in a large city.