{"help": "https://midas.hsl.harvard.edu/gl_ES/api/3/action/help_show?name=datastore_search", "success": true, "result": {"include_total": true, "limit": 100, "records_format": "objects", "resource_id": "fd059525-563e-468f-9cb3-b103b5e3dc1e", "total_estimation_threshold": null, "records": [{"_id":1,"variable":"group","code":"HW\nTC","description":"Health and Wellness\nTai Chi","ref":""},{"_id":2,"variable":"condition","code":"NW\nDT","description":"Normal Walking condition\nDual Task walking condition","ref":""},{"_id":3,"variable":"Total Duration","code":"","description":"Total Duration (seconds): total duration captured by the MobilityLab (accelerometer) during walking","ref":""},{"_id":4,"variable":"Stride Length (L)","code":"","description":"Gait: Stride Length SI L (m) [Mean]: distacne between two consecutive foot falls at the moments of initial contacts of the left leg.","ref":""},{"_id":5,"variable":"Stride Length","code":"","description":"Gait: Strude Length SI (m) [Mean]: distance between two consecutive foot falls at the moments of initial contacts. Averaged for left and right side. The value is normalized for height.","ref":""},{"_id":6,"variable":"Stride Length (R)","code":"","description":"Gait: Stride Length SI R (m) [Mean]:  distance between two consecutive foot falls at the moments of initial contacts of the right leg. The value is normalized for height.","ref":""},{"_id":7,"variable":"Stride Velocity (L)","code":"","description":"Gait: Stride Velocity SI L (m/s) [Mean]: walking speed of left leg","ref":""},{"_id":8,"variable":"Stride Velocity ","code":"","description":" Gait: Stride Velocity SI (m/s) [Mean]: walking speed. Average of the right and left sides. This code is to measure gait speed. Gait speed was recorded and calculated by the Mobility Lab system. Gait speed is calculated based on stride length and gait cycle time (=stride length/gait cycle time). Gyroscopes attached on the shanks from the Mobility System are used to detect the gait events (i.e. time feet hit the ground and leave the ground). A gait cycle is defined as the period between two consecutive initial contacts (heel-strike) of the right foot (parameter: Gait Cycle Time (seconds)). Spatial gait measures (i.e. stride length) are estimated using a biomechanical model (ref). ","ref":"Salarian A, Russmann H, Vingerhoets FJG, et al. (2004) Gait assessment in parkinson's disease: toward an ambulatory system for long-term monitoring. IEEE Trans Biomed Eng 51 (2004), no. 8., 1434-1443"},{"_id":9,"variable":"Stride Velocity (R)","code":"","description":" Gait: Stride Velocity SI R (m/s) [Mean]: walking speed of right leg","ref":""},{"_id":10,"variable":"Cadence","code":"","description":" Gait: Cadence (steps/min) [Mean]: stepping rate","ref":""},{"_id":11,"variable":"Gait Cycle Time","code":"","description":"Gait: Gait Cycle Time (seconds) [Mean]: duration of a complete gait cycle","ref":""},{"_id":12,"variable":"Gait Cycle Time Variability","code":"","description":"Gait: Gait Cycle Time (%) [CoV]: coefficient of variation about the mean stride time.  This code is to measure stride time gait variability (=gait variability). Gait variability was defined as the coefficient of variation (CoV) about the mean stride time ( = standard deviation of the stride time/mean stride time). Stride time here is equal to gait cycle time recorded and calculated by the Mobility Lab system.  Gyroscopes attached on the shanks from the Mobility Lab System are used to detect the gait events (i.e. time feet hit the ground and leave the ground). A gait cycle is defined as the period between two consecutive initial contacts (heel-strike) of the right foot (parameter: Gait Cycle Time (seconds)).  (ref)","ref":"Salarian A, Russmann H, Vingerhoets FJG, et al. (2004) Gait assessment in parkinson's disease: toward an ambulatory system for long-term monitoring. IEEE Trans Biomed Eng 51 (2004), no. 8., 1434-1443"}], "fields": [{"id": "_id", "type": "int"}, {"id": "variable", "type": "text"}, {"id": "code", "type": "text"}, {"id": "description", "type": "text"}, {"id": "ref", "type": "text"}], "_links": {"start": "/api/action/datastore_search?resource_id=fd059525-563e-468f-9cb3-b103b5e3dc1e", "next": "/api/action/datastore_search?resource_id=fd059525-563e-468f-9cb3-b103b5e3dc1e&offset=100"}, "total": 12, "total_was_estimated": false}}