Guiding Questions
- C1.
What is the association between physical activity and health-related outcomes?
Is there a dose response association (volume, duration, frequency, intensity)?
Does the association vary by type or domain of physical activity?
Inclusion Criteria
Population: Adults over 64 years of age
Exposure: Greater volume, duration, frequency or intensity of physical activity
Comparison: No physical activity or lesser volume, duration, frequency, or intensity of physical activity
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Outcomes | Importance |
---|
Falls and fall-related injuries | Critical |
Functional ability (e.g., frailty (sarcopenia), balance, strength, mobility, gait speed, activities of daily living) | Critical |
Osteoporosis | Critical |
Psychosocial outcomes (e.g., social isolation, social participation) | Important |
Evidence identified
Twenty-one reviews (published from 2017 to 2019) were initially identified that examined the association between physical activity and health-related outcomes among older adults (1–21). Six reviews were subsequently excluded from further evaluation given the study design, populations, exposures, or outcomes that were out-of-scope. presents the reviews that were excluded and their reason for exclusion.
In general, these reviews were of moderate quality based on the AMSTAR 2 instrument. One review was rated as having high credibility, 7 were rated as having moderate credibility, 3 were rated as having low credibility, and the remaining 4 reviews were rated as having critically low credibility. Given concerns regarding the comprehensiveness and the validity of the results presented in these reviews, they were not incorporated into the final Evidence Profiles. presents the ratings for each review according to all the AMSTAR 2 main domains.
Table C1.1Excluded Systematic Reviews, with Reasons for Exclusion
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Author, Year | Reason for Exclusion | Rationale |
---|
Dillon 2018 (7) | Population | Review limited to older adults with visual impairment |
Gordt 2017 (9) | Exposure | Exposure not applicable (wearable sensor balance and gait training) |
Hart 2019 (10) | Outcome | Outcome not applicable (health-related quality of life subscale) |
Kauppi 2017 (12) | Relevance | Cohort study that addresses the association between social network size (exposure) and levels of health risk behaviours (outcome) |
Vancampfort 2019 (20) | Design | Cross-sectional study |
Yoshimura 2017 (21) | Population, Exposure | Population limited to adults with sarcopenia; only one included study was an exercise-only intervention |
After appropriate exclusions, 2 reviews were included that reported falls-related injuries, 8 reviews were included that reported a measure of physical function (variably defined), and one review was included that measured social support (and was included in the outcome of social isolation) (). Only one review searched for evidence through 2019; several of the reviews only searched through 2014 or 2015. Extracted data for each included review is presented in Appendix A. A link to the summary of the U.S. Physical Activity Guidelines evidence relevant to these subgroups is provided in the Evidence Profiles.
Table C1.2Credibility Ratings (based on AMSTAR 2 (22))
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Author, Year | PICO1 | Apriori Methods2 | Study Design Selection3 | Lit Search Strategy4 | Study Selection5 | Data Extraction6 | Excluded Studies7 | Included Studies8 | RoB Assessment9 | Funding Sources10 | Statistical Methods11 | Impact of RoB12 | RoB Results13 | Heterogeneity14 | Publication Bias15 | COI16 | Overall Rating17 |
---|
Binkley 2019 (1) | Y | N | Y | PY | Y | N | PY | PY | PY | N | N/A | N/A | N | N | N/A | N | Critically Low |
Bruderer-Hofstetter 2018 (2) | Y | PY | N | PY | Y | Y | PY | Y | PY | N | Y | Y | Y | Y | Y | Y | Moderate |
Bueno de Souza 2018 (3) | Y | PY | N | PY | Y | N | PY | Y | Y | N | Y | N | Y | Y | N | Y | Low |
Burton 2019 (4) | Y | N | N | PY | Y | N | PY | PY | Y | N | Y | Y | Y | Y | N | Y | Critically Low |
da Rosa Orssatto 2019 (5) | Y | PY | N | PY | Y | N | Y | PY | PY | N | Y | N | Y | Y | Y | Y | Moderate |
de Souto Barreto 2018 (6) | Y | Y | N | PY | Y | Y | PY | PY | Y | N | Y | Y | Y | Y | Y | N | Moderate |
Falck 2019 (8) | Y | PY | N | PY | Y | Y | PY | PY | Y | N | N | Y | Y | Y | Y | Y | Critically Low |
Hita-Contreras 2018 (11) | Y | PY | N | PY | Y | Y | PY | PY | Y | N | Y | N | N | Y | Y | Y | Low |
Kidd 2019 (13) | Y | PY | N | PY | Y | Y | PY | PY | Y | N | N/A | N/A | Y | Y | N/A | Y | Moderate |
Labott 2019 (14) | Y | PY | N | PY | Y | N | PY | PY | PY | N | Y | Y | Y | Y | Y | Y | Moderate |
Lindsay Smith 2017 (15) | Y | PY | N | PY | Y | Y | PY | PY | PY | N | N/A | N/A | Y | N | N/A | Y | Moderate |
McMullan 2018 (16) | N | PY | N | PY | Y | Y | Y | PY | Y | N | N | Y | Y | Y | Y | Y | Critically Low |
Sherrington 2019 (17) | Y | Y | N | PY | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | High |
Sivaramakrishnan 2019 (18) | Y | Y | N | PY | Y | Y | PY | PY | Y | N | Y | Y | Y | Y | Y | Y | Moderate |
Taylor 2018 (19) | Y | N | N | PY | Y | N | PY | PY | Y | N | Y | Y | Y | Y | N | Y | Low |
Abbreviations: COI = conflict of interest; N = no; N/A = not applicable; PICO = population, intervention, comparator, outcome; PY = partial yes; RoB = risk of bias; Y = yes
- 1
Did the research questions and inclusion criteria for the review include the components of PICO?
- 2
Did the report of the review contain an explicit statement that the review methods were established prior to the conduct of the review and did the report justify any significant deviations from the protocol?
- 3
Did the review authors explain their selection of the study designs for inclusion in the review?
- 4
Did the review authors use a comprehensive literature search strategy?
- 5
Did the review authors perform study selection in duplicate?
- 6
Did the review authors perform data extraction in duplicate?
- 7
Did the review authors provide a list of excluded studies and justify the exclusions?
- 8
Did the review authors describe the included studies in adequate detail?
- 9
Did the review authors use a satisfactory technique for assessing the risk of bias (RoB) in individual studies that were included in the review?
- 10
Did the review authors report on the sources of funding for the studies included in the review?
- 11
If meta-analysis was performed did the review authors use appropriate methods for statistical combination of results?
- 12
If meta-analysis was performed, did the review authors assess the potential impact of RoB in individual studies on the results of the meta-analysis or other evidence synthesis?
- 13
Did the review authors account for RoB in individual studies when interpreting/ discussing the results of the review?
- 14
Did the review authors provide a satisfactory explanation for, and discussion of, any heterogeneity observed in the results of the review?
- 15
If they performed quantitative synthesis did the review authors carry out an adequate investigation of publication bias (small study bias) and discuss its likely impact on the results of the review?
- 16
Did the review authors report any potential sources of conflict of interest, including any funding they received for conducting the review?
- 17
Shea et al. 2017. AMSTAR 2: a critical appraisal tool for systematic reviews that include randomised or non-randomised studies of healthcare interventions, or both.
Table C1.3Systematic Reviews Assessed, by Author
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Author, Year | Outcomes | Last Search Date | # of included studies | AMSTAR 2 |
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Falls-related Injuries | Physical Function | Social Isolation |
---|
Binkley 2019 (1) | ✕ | ✕ | | Jan 2015 | 15 | Critically Low |
Bruderer-Hofstetter 2018 (2) | | ✕ | | May 2017 | 17 | Moderate |
Bueno de Souza 2018 (3) | | ✕ | | Mar 2017 | 9 | Low |
Burton 2019 (4) | | ✕ | | Aug 2018 | 18 | Critically Low |
da Rosa Orssatto 2019 (5) | | ✕ | | Jan 2019 | 14 | Moderate |
de Souto Barreto 2018 (6) | ✕ | | | Mar 2018 | 40 | Moderate |
Falck 2019 (8) | | ✕ | | Nov 2018 | 44 | Critically Low |
Hita-Contreras 2018 (11) | | ✕ | | Apr 2018 | 7 | Low |
Kidd 2019 (13) | | ✕ | | Mar 2017 | 10 | Moderate |
Labott 2019 (14) | | ✕ | | Dec 2018 | 24 | Moderate |
Lindsay Smith 2017 (15) | | | ✕ | Aug 2014 | 27 | Moderate |
McMullan 2018 (16) | | ✕ | | Jul 2016 | 30 | Critically Low |
Sherrington 2019 (17) | ✕ | | | May 2018 | 108 | High |
Sivaramakrishnan 2019 (18) | | ✕ | | Sep 2017 | 16 | Moderate |
Taylor 2018 (19) | | ✕ | | Apr 2015 | 18 | Low |
Appendix A. Data Extractions of Included Reviews
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