Skip to main content
. 2019 Feb 28;6(1):e13111. doi: 10.2196/13111

Table 4.

Results of the secondary outcome measures (knee range of motion).

Outcome variables Digital intervention group, mean (SD) Control group, mean (SD) P valuea Estimate difference between groups 95% CI
Baseline

Lying flexion 80.7 (12.4) 84.7 (18.7) .34 4.0 –12.2 to 4.3

Sitting flexion 85.3 (16.0) 90.4 (13.1) .19 5.1 –12.8 to 2.5

Standing flexion 71.6 (20.3) 78.8 (16.6) .15 7.2 –16.8 to 2.6

Sitting extension 26.5 (8.4) 24.8 (7.8) .43 1.7 –2.5 to 6.0
At 3 months

Lying flexion 100.1 (12.6) 93.3 (13.6) .052 6.8 –0.04 to 13.62

Sitting flexion 102.5 (13.1) 96 (11.3) .046 6.5 0.10-12.89

Standing flexion 95.6 (10.2) 84.9 (10.4) <.001 10.7 5.22-16.08

Sitting extension 11.8 (8.3) 19 (8.8) .002 –7.2 2.73-11.65
Change from baseline to 3 months

Lying flexion 19.4 (15.5) 8.7 (15.1) .009 10.7 2.8-18.7

Sitting flexion 17.3 (20.1) 5.7 (14.7) .01 11.6 2.4-20.8

Standing flexion 23.9 (17.6) 6.1 (14.1) <.001 17.8 9.5-26.2

Sitting extension –14.8 (9.0) –5.9 (11.6) .002 -8.9 –3.5 to –14.3
At 6 months

Lying flexion 103.4 (10.6) 101.5 (13.3) .55 1.9 –4.38 to 8.15

Sitting flexion 102.5 (10.8) 102.2 (12.3) .93 0.3 –5.77 to 6.29

Standing flexion 97.4 (9.9) 89.9 (11.7) .01 7.5 1.78-13.08

Sitting extension 7.1 (6.6) 9.7 (5.8) .12 –2.6 –5.83 to 0.64
Change from baseline to 6 months

Lying flexion 22.7 (12.9) 16.8 (17.4) .15 5.8 –2.1 to 13.8

Sitting flexion 17.2 (19.1) 11.9 (13.9) .22 5.4 –3.4 to 14.1

Standing flexion 25.7 (20.1) 11.2 (14.0) .002 14.6 5.5-23.6

Sitting extension –19.4 (8.4) –15.1 (8.7) .06 –4.3 –8.8 to 0.2

aIndependent samples t test.