title: Prevalence and Correlates of Physical Activity and Sitting Time in Cancer Survivors: 2009-2013 Korea National Health and Nutrition Examination Survey
abstract: Objectives: A physically active lifestyle is important for cancer survivors. Therefore, this study was conducted to
  1) provide population-based estimates of the prevalence of physical activity and sitting time, and 2) their correlates in
  Korean cancer survivors. Materials and Methods: This study analyzed a cancer survivor subsample (N=1,482) from
  2008-2013 Korea National Health and Nutrition Examination Survey (KNHANES), data selected with a complex
  sampling design. Overall and subgroup-specific prevalences of physical activity and sitting time were estimated.
  Correlates of moderate- to vigorous-intensity physical activity ( MVPA) and sitting time were tested using age-groupspecific
  hierarchical multiple regression models. Results: Overall adherence rate to physical activity guidelines was
  34.9% (95% CI=31.5-38.4). Age-group-specific adherence rates were 41.1% (95% CI=36.3-45.9) in adults (30-64
  years old), and 25.3% (95% CI=21.0-25.3) in older adults (65 years or older). Adults spent 213.33 minutes (95%
  CI=172.4-254.3) per week on MVPA and 55.3 minutes (95% CI=36.4-64.6) on sitting time per day. In adults, sitting
  time was significantly associated with employed status (B=28.0, p=0.046), smoking (B=-47.4, p=0.020), and number
  of comorbidity conditions (B=-13, p=.037). MVPA was significantly associated with marital status (B=134.9, p<0.001),
  employment status (B=98.12, p=.046), and years since cancer diagnosis (B=104.7, p=0.015). Older adults spent 162.2
  minutes (95% CI=119.5-204.8) per week on MVPA and 63.0 minutes (95% CI=45.0-89.5) on sitting time per day. Their
  significant correlates were sex (B= -45.2, p=0.014), smoking (B=-70.14, p<0.001), and years since cancer diagnosis
  (B=37.0, p=0.024). Age (B=5.8, p=0.042) and marital status (B=83.8, p=0.033) were also significantly associated with
  MVPA in older adults. Conclusion: A majority of Korean cancer survivors do not sufficiently participate in physical
  activity. In general, older, unhealthier, non-working, and being unmarried were risk factors for physical inactivity.
  While this study informs public health policy makers and practitioners about physical activity intervention demand for
  cancer survivors, future investigations should address psychosocial mediators to better inform intervention programs.
authors.affiliation: Department of Sport and Health Sciences, Sangmyung University, Seoul, Korea. Email: hyolee@smu.ac.kr
authors.forename: Byung Hoon
authors.initials: BH
authors.lastname: Kim
authors.forename: Hyo
authors.initials: H
authors.lastname: Lee
keywords: Physical activity; sedentary; KNHANES