노인의 비타민 D 부족과 신체활동 및 비만지표 간의 연관성 = Association of Physical Activity and Body Fatness with Vitamin D Deficiency in Older Adults

다국어 초록 (Multilingual Abstract)

Background: This study investigated the association between physical activity and body fatness with serum vitamin D level in older adults.
Methods: A total of 233 older adults (39 men and 194 women) aged older than 65 years were voluntarily recruited from a local community.
Physical activity was monitored using a uniaxial accelerometer. Body fatness was measured using a standardized protocol. Subjects were classified as sufficient (>30 ng/mL), insufficient (20-29 ng/mL), or deficient (<20 ng/mL) based on serum vitamin D level. Pearson correlation analyses were used to calculate bivariate correlations between variables. Logistic regression was used to determine the odds ratio of serum vitamin D inadequacy.
Results: There were linear increases in physical activity parameters including daily steps (P<0.001), low-intensity physical activity (P<0.001), moderate-intensity physical activity (P<0.001), and high-intensity physical activity (P<0.001) and linear decreases in body fatness parameters such as body mass index (P=0.039) and waist circumference (P=0.020) across incremental vitamin D levels. Vitamin D level was positively associated with daily steps (P<0.001), low-intensity physical activity (P<0.001), moderate-intensity physical activity (P<0.001), and highintensity physical activity (P<0.001) and negatively associated with body mass index (P=0.001), percentage body fat (P=0.005), and waist circumference (P=0.003). Compared to the active group (reference), the inactive group (P=0.001) had a significantly higher odd ratio for serum vitamin D deficiency even after adjusting for age and sex (P=0.002).
Conclusion: The findings of this study suggest that physical activity and vitamin D supplementation should be promoted for healthy aging.

국문 초록 (Abstract)

배경: 본 연구는 횡적 연구를 통해 노인의 신체활동 및 비만지표가 비타민 D 수준과 어떠한 연관성이 있는지 구명하는 것을 목적으로 하였다.
방법: 65세 이상 노인 233명(남 39명, 여 194명)을 대상으로 전반적인 신체활동량을 측정하기 위해 동작가속도계를 사용하였으며, 비만지표는 표준화된 프로토콜을 이용하여 측정하였다. 변인들 간의 상관성은 피어슨의 상관관계로 분석하였으며, 신체활동 수준에 따른 비타민 D 부족의 상대적 위험도를 산출하기 위해 로지스틱 회귀분석을 실시하였다.
결과: 1일 보수(P<0.001), 저강도 신체활동(P<0.001), 중강도 신체활동(P<0.001), 고강도 신체활동(P<0.001), 체질량지수(P=0.039), 허리둘레(P=0.020)는 비타민 D 수준에 따른 집단 간 유의한 선 경향이 있는 것으로 나타났다. 비타민 D 수준은 1일 보수(P<0.001), 저강도 신체활동(P<0.001), 중강도 신체활동(P<0.001), 고강도 신체활동(P<0.001)과는 유의한 양의 상관관계를 갖는 것으로 나타났으며, 체질량 지수(P=0.001), 체지방률(P=0.005), 허리둘레(P=0.003)와는 유의한 음의 상관관계를 갖는 것으로 나타났다. 비타민 D 부족에 대한 신체활동의 상대적 위험도를 산출한 결과, 비활동 집단의 상대적 위험도는 3.925 (P=0.001)로 활동적 집단에 비해 유의하게 높은 것으로 나타났으며, 나이와 성별을 보정한 후에도 4.058 (P=0.002)로 나타났다.
결론: 노인의 비타민 D 부족 증상에 대해 적절하게 대처하기 위해서는 야외에서 실시할 수 있는 다양한 신체활동 프로그램과 더불어 적극적인 비만 관리가 필요할 것으로 판단된다.

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