There are three types of measurements 1) TELER indicators, (2) physical measurements (3) measures of cost. The TELER indicators are a tool to measure observations of hand function, device use, symptoms and problems/limitations. The indicators measure clinically meaningful changes comprising an improvement, deterioration or no change in hand function from one time point to another. Each indicator is on a scale of six clinical steps or 'codes'. Code 5 is best case scenario or the treatment goal and code 0 is worst case scenario (i.e. the problem to be avoided) with codes 4, 3, 2 and 1 being clinically meaningful steps towards or away from the treatment goal.