Table 3

Exploratory analysis on associations between perceived helpfulness, patient factors and usage

Helpful (n=23)Not helpful (n=13)p Value
Mean Beck’s Depression Inventory (BDI) score*35 (SD 12.81)38.15 (SD 9.09)0.44
Mean per cent change in BDI score†−21.51% (SD 33.91)−34.75% (SD 28.79)0.283
Mean age in years‡52.57 (SD 13.90)54.17 (SD 9.13)0.72
Pretherapy physical activity goals1360.549
Prior smartphone use1580.825
Mean weeks used§18.57 (SD 1.21)12.27 (SD 5.76)<0.001
  • *BDI scores may range from 0 to 63, where higher scores indicate higher severity of depression.

  • †Five participants were excluded due to lack of data; three had found the Fitbit helpful.

  • ‡One participant who found the Fitbit not helpful was excluded due to lack of age data.

  • §Four participants were excluded due to lack of data; two had found the Fitbit helpful.