The Optimal Cut-off Score of the 2-Minute Step Test for Prediction of Cardiopulmonary Endurance in Older Adults with Hypertension
Keywords:
Elderly; hypertension, cardiopulmonary endurance; 6 minute walk test; 2 minute step testAbstract
Background and Objective: 2MST is an alternative test for assessment of cardiopulmonary endurance in the older when 6MWT unable to perform due to space limitations or weather prohibits. However, the study of using 2MST for assessing the cardiopulmonary endurance in hypertensive Thai elderly has not been investigated. Therefore, the aimed of the present study was to evaluated functional ability of 2MST for predict of cardiopulmonary endurance in hypertensive elderly.
Method: The ninety-seven hypertensive elderly volunteers who were over 60 years old. Cardiopulmonary endurance was determined by using 6MWT which divided into 2 groups; low and normal cardiopulmonary endurance group. By following, all subjects were taken rest for 60 minutes before starting the 2MST. The sensitivity, specificity, area under the curve, and cut off point, were assessed for significant using receive-operating characteristic (ROC) curve.
Results: The results showed that the normal cardiopulmonary endurance group had number of leg rises in 2 minutes higher than the low cardiopulmonary endurance group (69.89±12.16 and 53.14±12.58 repetitions, respectively; p<0.001). 2MST was moderately correlated with 6MWT (r= 0.721; p <0.001). Moreover, the cutoff point of number of leg rises was 60 repetitions in 2 minutes (sensitivity 81.13%, specificity 63.64%, and area under the curve 0.83; 95% CI = 0.75-0.91).
Conclusion: Older adults with hypertension who had less number of leg rises than 60 repetitions in 2 minutes were indicated to risk or low cardiopulmonary endurance.
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