| Title: |
The 6-minute walk test is a good predictor of cardiorespiratory fitness in childhood cancer survivors when access to comprehensive testing is limited |
| Authors: |
Mizrahi, D; Fardell, JE; Cohn, RJ; Partin, RE; Howell, CR; Hudson, MM; Robison, LL; Ness, KK; McBride, J; Field, P; Wakefield, CE; Simar, D |
| Source: |
urn:ISSN:0020-7136 ; urn:ISSN:1097-0215 ; International Journal of Cancer, 147, 3, 847-855 |
| Publisher Information: |
Wiley |
| Publication Year: |
2020 |
| Collection: |
UNSW Sydney (The University of New South Wales): UNSWorks |
| Subject Terms: |
32 Biomedical and Clinical Sciences; 3202 Clinical Sciences; Cancer; Heart Disease; Physical Activity; Clinical Research; Pediatric Research Initiative; Rare Diseases; Prevention; Cardiovascular; Pediatric Cancer; 3 Good Health and Well Being; Adolescent; Algorithms; Cancer Survivors; Cardiorespiratory Fitness; Child; Cross-Sectional Studies; Female; Humans; Male; Oxygen Consumption; ROC Curve; Waist-Height Ratio; Walk Test; childhood cancer survivor; exercise; anzsrc-for: 32 Biomedical and Clinical Sciences; anzsrc-for: 3202 Clinical Sciences; anzsrc-for: 1112 Oncology and Carcinogenesis |
| Description: |
Cardiovascular disease is up to 10 times more likely among childhood cancer survivors compared to siblings. Low cardiorespiratory fitness is a modifiable risk-factor for cardiovascular diseases. Yet, cardiorespiratory fitness is not routinely screened in pediatric oncology, and healthy VO 2max cut-points are unavailable. We aimed to predict cardiorespiratory fitness by developing a simple algorithm and establish cut-points identifying survivors’ cardiovascular fitness health-risk zones. We recruited 262 childhood cancer survivors (8–18 years old, ≥1-year posttreatment). Participants completed gold-standard cardiorespiratory fitness assessment (Cardiopulmonary Exercise Test [CPET; VO 2max ]) and 6-minute walk test (6MWT). Associations with VO 2max were included in a linear regression algorithm to predict VO 2max , which was then cross-validated. We used Bland–Altman's limits of agreement and Receiver Operating Characteristic curves using FITNESSGRAM's “Healthy Fitness Zones” to identify cut-points for adequate cardiorespiratory fitness. A total of 199 participants (aged 13.7 ± 2.7 years, 8.5 ± 3.5 years posttreatment) were included. We found a strong positive correlation between VO 2max and 6MWT distance (r = 0.61, r 2 = 0.37, p < 0.001). Our regression algorithm included 6MWT distance, waist-to-height ratio, age and sex to predict VO 2max (r = 0.79, r 2 = 0.62, p < 0.001). Forty percentages of predicted VO 2max values were within ±3 ml/kg/min of measured VO 2max . The cut-point for FITNESSGRAM's “health-risk” fitness zone was 39.8 ml/kg/min (males: AUC = 0.88), and 33.5 ml/kg/min (females: AUC = 0.82). We present an algorithm to reasonably predict cardiorespiratory fitness for childhood cancer survivors, using inexpensive measures. This algorithm has useful clinical application, particularly when CPET is unavailable. Our algorithm has the potential to assist clinicians to identify survivors below the cut-points with increased cardiovascular disease-risk, to monitor and refer for tailored interventions with ... |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
https://hdl.handle.net/1959.4/unsworks_63236; https://doi.org/10.1002/ijc.32819 |
| DOI: |
10.1002/ijc.32819 |
| Availability: |
https://hdl.handle.net/1959.4/unsworks_63236; https://unsworks.unsw.edu.au/bitstreams/4787c994-cd09-4926-9b7a-4cef94c42191/download; https://doi.org/10.1002/ijc.32819 |
| Rights: |
open access ; https://purl.org/coar/access_right/c_abf2 ; CC-BY-NC-ND ; https://creativecommons.org/licenses/by-nc-nd/4.0/ ; free_to_read |
| Accession Number: |
edsbas.9AB717CA |
| Database: |
BASE |