Table 3.

Age specific and generalizability classification accuracy across all activities^c.

	Age specifica				Generalizabilityb
Accelerometer site	18–39 years (n= 33)	40–64 years (n= 33)	≥65 years (n = 33)	All (n= 33)	40–64 years (n= 33)	≥65 years (n = 33)
Ankle	87.57	85.51	72.54	83.00	78.99	77.61
Hip	80.11	76.42	71.94	81.59	37.25	68.36
Wrist	77.62	69.89	69.25	68.56	64.71	67.46
Hip + Wrist	88.40	83.24	76.42	86.69	61.34	77.91
Ankle + Wrist	92.81	88.35	82.09	86.40	82.07	84.18
Ankle + Hip	88.40	90.34	78.21	82.72	68.35	77.41
Ankle + Hip + Wrist	92.82	92.61	85.97	89.24	77.59	82.48

^aAge Specific—model estimates developed and tested within age group classification.

^bGeneralizability—model developed on the young age group and tested on the other age group classifications.

^cWalking activities 1.5 mph and 2.0 mph. 2.5 mph and 3.0 mph, 3.5 mph and 4.0 mph were collapsed into single categories of slow walk, moderate walk and fast walk, respectively for purposes of activity classification only.

Note: values are presented as a percentage.