The PIT: SToPP Trial—A Feasibility Randomised Controlled Trial of Home-Based Physiotherapy for People with Parkinson's Disease Using Video-Based Measures to Preserve Assessor Blinding

Table 3

Reasons for missing and unusable data, by measure type.

Measure type	Number of potential measurements	Number of data missing		Number of data unusable
		Participant drop-out	Test declined, omitted, or not recorded or questionnaire not returned	Error in testing or recording, poor-quality recording, or questionnaire incomplete
In situ—real time
FR	188	19 (10%)	18 (10%)	27 (14%)
Video based
PAS	188	19 (10%)	9 (5%)	4 (2%)
Transfer time	188	19 (10%)	9 (5%)	2 (1%)
SS-180 time	188	19 (10%)	10 (5%)	18 (10%)
Posture	188	19 (10%)	9 (5%)	5 (3%)
Postal questionnaires
SAS	188	18 (10%)	24 (13%)	9 (5%)
HR-QOL	188	18 (10%)	25 (13%)	16 (9%)
Total	1316	131 (10%)	104 (8%)	81 (6%)