A survey of vitamin D status and development of the predictive model for vitamin D deficiency in Japanese young women

A survey of vitamin D status and development of the predictive model for vitamin D deficiency in Japanese young women - A survey of vitamin D status and development of the predictive model for vitamin D deficiency in Japanese young women

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000041527

Enrollment

600

Registered

2020-10-01

Start date

2020-10-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy young women

Interventions

None listed

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: (1) The area of the study To determine the effect of latitudes on serum 25(OH)D level, this study is performed in four areas (Hokkaido and Tohoku region, from Kanto to Shikoku region, Kyushu and Okinawa region). (2) 18- 40 ys female at the time of study participation (3) Having provided voluntary written consent for participation in this study. For subjects under 20 ys of age, parental consent is also required.

Exclusion criteria

Exclusion criteria: (1) Subjects with comorbidities such as chronic kidney disease, autoimmune disease, inflammatory bowel disease, cancer, liver disease, diabetes mellitus. (2) Subjects under sun exposure prohibition (e.g. xeroderma pigmentosum)

Design outcomes

Primary

Measure	Time frame
Serum 25-hydroxyvitamin D [25(OH)D] level	—

Secondary

Measure	Time frame
serum intact-PTH level	—

Countries

Japan

Contacts

Public ContactAkiko Kuwabara

Osaka Prefecture University Graduate School of Comprehensive Rehabilitation

akuwabara@rehab.osakafu-u.ac.jp072-950-2852

Outcome results