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Table 2 Classification performance for SENS and ActiPASS classifications during laboratory and free-living conditions

From: Thigh-worn accelerometry: a comparative study of two no-code classification methods for identifying physical activity types

Condition

Algorithm

Activity

Precision

Sensitivity

Specificity

Balanced Accuracy

Laboratory

SENS

Sedentary

0.98 [0.97, 0.99]

1.00 [1.00, 1.00]

0.99 [0.99, 0.99]

0.99 [0.99, 0.99]

Standing

0.99 [0.99, 1.00]

1.00 [1.00, 1.00]

0.99 [0.99, 1.00]

0.99 [0.99, 1.00]

Walking

0.93 [0.91, 0.95]

0.97 [0.96, 0.99]

0.98 [0.98, 0.99]

0.98 [0.97, 0.98]

Running

1.00 [1.00, 1.00]

0.99 [0.99, 0.99]

1.00 [1.00, 1.00]

0.99 [0.99, 0.99]

Cycling

1.00 [1.00, 1.00]

0.93 [0.90, 0.95]

1.00 [1.00, 1.00]

0.96 [0.95, 0.98]

ActiPASS

Sedentary

0.99 [0.98, 1.00]

1.00 [1.00, 1.00]

0.99 [0.99, 1.00]

0.99 [0.99, 1.00]

Standing

0.60 [0.58, 0.62]

0.99 [0.98, 1.00]

0.92 [0.91, 0.92]

0.95 [0.95, 0.96]

Walking

0.93 [0.89, 0.97]

0.65 [0.62, 0.68]

0.98 [0.97, 0.99]

0.82 [0.80, 0.83]

Running

0.99 [0.98, 1.00]

0.92 [0.89, 0.96]

0.99 [0.99, 1.00]

0.96 [0.94, 0.98]

Cycling

1.00 [1.00, 1.00]

0.97 [0.92, 1.00]

1.00 [1.00, 1.00]

0.98 [0.96, 1.00]

Free-living

SENS

Sedentary

0.95 [0.92, 0.98]

0.97 [0.95, 0.99]

0.99 [0.98, 0.99]

0.98 [0.97, 0.99]

Standing

0.84 [0.78, 0.89]

0.80 [0.76, 0.84]

0.97 [0.95, 0.98]

0.88 [0.86, 0.90]

Walking

0.76 [0.70, 0.82]

0.95 [0.93, 0.97]

0.90 [0.88, 0.93]

0.93 [0.91, 0.94]

Running

0.95 [0.89, 1.00]

0.98 [0.96, 0.99]

0.99 [0.99, 1.00]

0.99 [0.98, 0.99]

Cycling

0.98 [0.97, 0.99]

0.61 [0.54, 0.68]

0.99 [0.99, 0.99]

0.81 [0.77, 0.84]

ActiPASS

Sedentary

0.95 [0.92, 0.98]

0.99 [0.99, 0.99]

0.99 [0.98, 0.99]

0.99 [0.99, 0.99]

Standing

0.72 [0.68, 0.76]

0.94 [0.92, 0.96]

0.94 [0.93, 0.96]

0.94 [0.93, 0.95]

Walking

0.96 [0.94, 0.97]

0.85 [0.81, 0.88]

0.99 [0.98, 0.99]

0.92 [0.90, 0.93]

Running

0.97 [0.93, 0.99]

0.94 [0.89, 0.98]

0.99 [0.99, 0.99]

0.97 [0.95, 0.99]

Cycling

0.99 [0.99, 0.99]

0.91 [0.88, 0.94]

0.99 [0.99, 0.99]

0.95 [0.94, 0.97]

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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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