2018 June: End of Campaign 4, n=20 subjects over 5 missions (including Mission 2 which was shortened to 23 days due to Hurricane Harvey).
Data yield is reported below for four categories in each mission: Overall Yield, Survey Yield, Wearables Yield (Actigraphy, Heart Rate, Sociometric Badges) and Objective Performance Yield (Cognition and ROBoT).
Campaign 4 Mission 1: Overall Data Yield: 99.89%; Survey Data Yield: 99.96%; Wearables Data Yield: 93.15%; Objective Performance Data Yield: 98.50%
Campaign 4 Mission 2: Percentage of expected data yield: Overall Data Yield: 55.38%; Survey Data Yield: 55.45%; Wearables Data Yield: 46.34%; Objective Performance Data Yield: 58.67%
Percentage of possible data yielded due to shortened mission: Overall Data Yield: 99.95%; Survey Data Yield: 99.95%; Wearables Data Yield: 86.61%; Objective Performance Data Yield: 100.00%
Campaign 4 Mission 3: Overall Data Yield: 96.33%; Survey Data Yield: 96.39%; Wearables Data Yield: 87.96%; Objective Performance Data Yield: 99.38%
Campaign 4 Mission 4: Overall Data Yield: 96.03%; Survey Data Yield: 96.14%; Wearables Data Yield: 82.63%; Objective Performance Data Yield: 99.50%
Campaign 4 Mission 5: Overall Data Yield: 96.74%; Survey Data Yield: 96.93%; Wearables Data Yield: 85.99%; Objective Performance Data Yield: 95.50%
On average, the survey with the lowest data yield was the Pre-Sleep Survey (96%), which includes assessments of mood, neurobehavioral functioning (e.g., stress), and conflict. This survey had the most instances of completely missing surveys and partially incomplete surveys. This issue was addressed by adding “force response” criteria to our Qualtrics surveys which prevented subjects from skipping questions.
On average, the wearables with the lowest data yield were the Polar heart rate monitors (78%). The lowest individual data yield was in Mission 3, in which one subject provided only 4 days of heart rate data out of 45 (.09%). The second lowest data yield was in Mission 4, in which one subject provided 7 days of heart rate data out of 45(.16%). We believe this was due to device malfunction and not abnormal noncompliance or human error. To address the concern of device malfunction, in Campaign 5 the Polar heart rate devices were replaced by Faros devices.
2020 February: Campaign 5 Missions 1-3 complete, n=12 subjects over 3 missions. Mission 4 in Progress.
Data yield is reported below for four categories in each mission: Overall Yield, Survey Yield, Wearables Yield (Actigraphy, Heart Rate, Sociometric Badges) and Objective Performance Yield (Cognition and ROBoT). Actigraphy and SS Badge data are being processed, so Heart Rate data will be the only wearable reported below.
Campaign 5 Mission 1: Overall Data Yield: 98.46%; Survey Data Yield: 98.43%; Wearables Data Yield: 100.00%; Objective Performance Data Yield: 98.91%
Campaign 5 Mission 2: Overall Data Yield: 99.12%; Survey Data Yield: 99.16%; Wearables Data Yield: 88.89%; Objective Performance Data Yield: 98.00%
Campaign 5 Mission 3: Overall Data Yield: 99.63%; Survey Data Yield: 99.71%; Wearables Data Yield: 98.33%; Objective Performance Data Yield: 93.11%
Including “force response” parameters improved data yield for the pre-sleep survey, which had an average response rate of 99% in Campaign 5, as apposed to 96% in Campaign 4. Additionally, yield of heart rate data improved with the replacement of Polar devices (78%) with Faros devices (96%). BHP Lab next steps are to finish collecting Campaign 5 data, determine the yield of Actigraphy and Sociometric badge data, and to analyze the quality of data received.
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