![]() ![]() ![]() Bland–Altman analysis revealed relative underestimation of spatiotemporal variables by the smartphone application compared to the motion system. Pearson correlations were low-to-very high between methods ( r range, 0.45–0.99). The smartphone application demonstrated moderate-to-excellent intraclass correlation coefficients for reliability between-system (ICC range, 0.56–0.99), -limb (ICC range, 0.62–0.99) and -device (ICC range, 0.61–0.96) for gait analysis of healthy adults. The smartphone application was used to evaluate change in gait dysfunction over time within the patients’ own environment using paired t test. Second objective, 12 additional patients with total hip or knee arthroplasty (mean age, 58.7 ± 6.5 years 58% males mean body mass index, 28.9 ± 5.8 kg/m ² ) were measured at 2- and 10 weeks postoperatively. Agreement was assessed by the Bland–Altman method. Validity was determined by Pearson correlations. Reliability was determined by intraclass correlation coefficients. Secondary purpose was to determine the feasibility of measuring gait dysfunction, limitation in spatiotemporal characteristics, longitudinally in patients following total hip or knee arthroplasty.įirst objective, 20 healthy adults (mean age, 42.3 ± 19.7 years 60% males mean body mass index, 29.0 ± 5.2 kg/m ² ) underwent gait analysis under four gait conditions (self-selected gait speed, fixed gait speed at 0.8 m/s, fixed gait speed at 2.0 m/s and self-selected gait speed with dual task) for the validity and reliability of the smartphone to the motion laboratory. Primary purpose of this study was to determine the validity and reliability of the OneStep smartphone application in healthy adults. Careful interpretation is required when using the Health app in children and when measuring DST in general, as both have shown limited validity and/or reliability. The Health app on iPhone is reliable and valid for measuring GS and SL in adults and seniors. Consistency between repeated measurements was good to excellent for all gait parameters in adults/seniors, and moderate to good for GS and DST but poor for SL in children. Agreement of the Health App with the APDM Mobility Lab was good for GS in all age groups and for SL in adults/seniors, but poor to moderate for DST in all age groups and for SL in children. Test–retest reliability was assessed via a second iPhone-instrumented 6MWT 1 week later. Gait parameters were simultaneously collected with an inertial sensors system (APDM Mobility Lab) to assess concurrent validity. Gait speed (GS), step length (SL), and double support time (DST) were extracted from the gait recordings of the Health app. ![]() Twenty-seven children, 28 adults and 28 seniors equipped with an iPhone completed a 6-min walk test (6MWT). In such cases, select the answer you would most likely choose if you ever found yourself in such circumstances.This study assessed the concurrent validity and test–retest-reliability of the Apple Health app on iPhone for measuring gait parameters in different age groups. There may be some questions describing situations that do not apply to you. Read every statement carefully and indicate which option applies best to you. In any case, you can use the results of this test as indicators of what areas in your relationship may benefit from some reflection and work. Others, that you might not yet be conscious of, may be the source of frustration and anger that seems to come out of nowhere. You might already be aware of some of the problems that will be pointed out (if any). This test will help you identify areas that cause your relationship to stumble. In this relationship health test, YOU are the reference point: your needs, your wishes, your point of view, your values and your beliefs. However, in other aspects, what works for one couple can be a disaster for another. Some behavior patterns are generally unhealthy, either for the relationship or for the individuals involved. Unlike other relationship/love tests, the one you are about to take is not based on value judgments about how a relationship is supposed to work. This relationship health test is designed to evaluate various aspects of interaction in a couple. ![]()
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