INTRODUCTION
Approximately 8.7 million people around the world die from cancer every year (Global Burden of Disease Cancer Collaboration et al., 2017). In providing medical services in a hospital, physical activity has been considered an important factor for patients facing various diseases. Existing studies (Clark et al., 2008; Martin et al., 2009; Meyerhardt et al., 2006; Peddle et al., 2008) that particularly emphasize the benefit of physical activities for recovering patients with cancer have become more important today. Despite the advantages of physical activities, inpatients with cancers, in fact, have a lot of limitations in participating in physical activities due to limitations of the physical environment within a hospital.
According to Weiderpass (2010), 35% of cancer patients, or 3 million lives, could have been saved by physical environment changes. In other words, providing an appropriate environment within the hospital for the physical activities of cancer patients can contribute significantly in helping cancer patients recover from their surgeries and further preventing the recurrence of cancer. Based on these study results, efforts to improve the physical environment within the hospital for cancer patients are undoubtedly crucial (Yang et al., 2015).
Despite evidence supporting the importance of the physical environment in the hospital for cancer patients, the scope of many existing studies is limited to: the effect of physical activities on cancer recurrence (Friedenreich et al., 2010; Oechsle et al., 2014; Persoon et al., 2013; Wiskemann et al., 2014), the effect of physical activities prior to and after cancer surgery (O’Doherty et al., 2013; Singh et al., 2013; West et al., 2015), and the effect after cancer treatments (Kim et al., 2009). There is insufficient analysis of the constraints of patients’ physical activities due to the limitations of current medical services.
Therefore, this study focuses on analyzing the influence of environmental constraints in the hospital on the level of inpatients’ physical activities during hospitalization and identifying the physical space limitations of hospitals in South Korea that may affect the patients’ physical activities. In particular, an empirical study was conducted to verify the physical space constraints patients face in the hospital as the existing studies articulate the importance of cancer patients’ physical activities for their recovery and prevention of recurrence while lacking fundamental supporting evidence.
MATERIALS AND METHODS
Study subjects
In order to analyze the effect of environmental constraints in the hospital on the level of cancer patients’ physical activities, the study subjects—cancer patients who are older than 20 years old—were selected from five general hospitals in the Seoul metropolitan area (Seoul, Gyeonggi-do, and Incheon). The data was collected with a survey conducted on 250 cancer patients from a population selected by purposive sampling. The survey was conducted from March to May 2017, and a total of 194 survey results were used in the final analysis, excluding 56 surveys with disqualifying responses such as unfaithful answers and double or missing entries. Table 1 shows the demographic characteristics of the subjects.
Research tools
To analyze the effect of environmental constraints in the hospital on the level of cancer patients’ physical activities, this study conducted surveys of cancer patients. The first three questions on their sex, age, and diagnosis were used to understand the demographic characteristics of the subjects. Eight questions regarding environmental constraints in hospitals were modified versions of the questions used in the existing studies of Zhu (2001). The last three questions were used to assess the level of cancer patients’ physical activities. The questions consisted of responses regarding three types of activities in terms of patients’ time spent in a hospital: (a) Time spent in a hospital bed (sleeping, watching TV, reading books, and others), (b) Time spent for daily maintenance (eating meals, washing, dressing and others), and (c) Time spent on intentional physical movement (walking, physical exercise, and others).
Reliability and validity of the questionnaire
This study conducted exploratory factor analysis to verify the reliability and validity of the survey results. In order to determine constructive factors, this study used principal component analysis, and to simplify factor qualifications, Varimax rotation was selected. Furthermore, the Kaiser-Meyer-Olkin (KMO) measure of sample adequacy was used for factor analysis. Bartlett’s test of sphericity (χ2) was used for indicating correlation matrices suitable for factor analysis. Question responses were developed by selecting variables with an eigenvalue higher than 1.0.
As a result of exploratory factor analysis, three factors of hospital facilities constraint and four factors of hospital program constraint were identified.
The environmental constraints within the hospital had KMO= 0.724 and χ2=340.928, and in terms of the eigenvalues of hospital facility constraints, the value was 2.695 (variance %: 38.494) while the eigenvalues of hospital program constraints were 1.587 (variance %: 22.673). All factor loadings were based on 0.05 or higher. As a result, one item of the hospital facility constraint factors was removed from eight items of environmental constraints within the hospital. Cronbach α coefficient was used to measure the reliability of each variable. The hospital facility constraint factor was 0.763 and hospital program constraint factor was 0.640.
Data analysis
The purpose of this study was to investigate the effect of environmental constraints on the level of physical activity in cancer patients. In order to conduct the survey, we first requested the collaboration of hospital staff, and researchers and research assistants visited the hospital and met the cancer patients in person to thoroughly explain the purpose and methodology of the survey. The questionnaire was prepared with a self-assessment method. The collected survey data excluded any disqualifying responses such as double or no entry. The qualifying survey data was imported to a computer by independent coding and a statistical program, IBM SPSS Statistics ver. 23.0 (IBM Co., Armonk, NY, USA), was used to conduct analyses such as frequency analysis, exploratory factor analysis, reliability analysis, correlation analysis, and multiple regression analysis.
RESULTS
Correlations among the variables
To verify the relationships among variables, this study examined the correlation between each subvariable and analyzed the correlation to confirm multicollinearity. As shown in Table 2, the results show correlations between variables at a level of P<0.05. Furthermore, correlation coefficients between the sub-variables were relatively low (less than 0.80), so there was no issue with multicollinearity. Therefore, the analyses confirmed that each variable is mutually independent. As shown in Table 2, hospital facility constraints were significantly correlated with hospital program constraints and patients’ time spent on intentional physical movement. In addition, hospital program constraints were positively correlated with patients’ time spent on intentional physical movement, and there was also a statistically significant correlation between patients’ time spent on daily maintenance and intentional physical movement.
Multiple regression analysis of hospital environmental constraints on the level of physical activity of cancer patients
To identify the effect of environmental constraints on the physical activity level of cancer patients, multiple regression analysis was performed, and the results are shown in Table 3.
The results in Table 3 show that first, the environmental constraints in the hospital did not affect the physical activity level of cancer patients during the time they spent in a hospital bed, as the descriptive power was 1.5%.
Second, the environmental constraints in the hospital did not affect the cancer patients’ physical activity level during their time spent on daily maintenance, as the descriptive power was approximately 0.8%.
However, the environmental constraints in the hospital had an effect on the cancer patients’ physical activity level during their time spent on intentional physical movement, with a descriptive power of approximately 12.7%. In terms of the environmental effects on patients’ physical activities in the hospital, relative importance was found to be in the order of hospital facility constraint (β=0.286) and hospital program constraint (β=0.147).
DISCUSSION
This empirical study focused on analyzing the effect of environmental constraints of the hospital on the level of cancer patients’ physical activity, and based on the collected data, the results of analyses are as follows:
As a result of analyzing the effect of environmental constraints on the physical activity level of cancer patients, the constraints related to hospital facilities and programs had no effect on patients’ time spent in a hospital bed and their time spent on daily maintenance such as eating meals, washing, and putting on clothes. In other words, regardless of the type of hospital facility or program put in place, the level of patients’ physical activities is unaffected. However, the time cancer patients spend on intentional physical movements is driven by hospital facilities or programs. Existing studies assert that hospital facilities or programs are important factors that affect patients’ intentional physical activities, and thus, patients’ recovery (Codinhoto et al., 2009; Devlin and Arneill, 2003; Huisman et al., 2012). In the same vein, the physical environment of a hospital has a crucial impact on promoting or inhibiting the physical activity of cancer patients. Therefore, as existing studies find that physical activity is an important factor in cancer treatment and the prevention of cancer recurrence, it is necessary that hospitals host an appropriate environment for patients in the effort for cancer treatment and recurrence prevention (Jonas and Chez, 2004; Ulrich, 1992).
In conclusion, for hospitalized cancer patients, physical activity levels are influenced by environmental constraints in the hospital. In particular, it is important to improve the hospital environment to increase physical activities such as walking, which is an important factor for cancer recovery and prevention of recurrence.
Above all, it is important to remember that a more detailed analysis of the characteristics of environmental constraints in hospitals can substantially enhance medical services for cancer patients. Based on the analysis results, this study recommends the following. Since this study did not consider differences in cancer diagnosis characteristics, subsequent studies may conduct in-depth analyses of the medical condition of a hospitalized cancer patient in the hospital considering the possibility that environmental constraints in the hospital may differ by the characteristics of different cancers. Furthermore, this study was limited to analyze the staff members of the hospital in improving the hospital environment. Thus, further research is needed to investigate in depth why hospitals fail to improve the environment in their hospitals, despite widely known existing study results on the benefits of physical activity for the recovery of cancer patients. The findings would contribute greatly to the improvement of the hospital environment for cancer inpatients.
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