Table 1.

Baseline characteristics of the participants (n = 12)

Baseline characteristics
	Mean (SD); Range; Median
Age (years)	72.6 (10.4) years; 48–84 years; 73 years
Weight (kg)	89.3 (16.7) kg; 70-132 kg; 90 kg
∫Body mass index	31.8 (4.6); 25–42; 31.5
	Number of patients (%)
Male gender	7 (58)
Female gender	5 (42)
∫Body mass index categories
BMI < 25	0 (0)
BMI 25–30	4 (33)
BMI > 30	8 (66)
#Medical card eligibility	10 (83)
Diagnosed by X-ray	10 (83)
Previous knee injury	8 (67)
Previous knee surgery	2 (17)

^∫Body mass index is weight in kilogrammes divided by the square of the height in metres

^#Ireland does not have universal registration with a general practitioner. Almost 45% of the population is registered through the Primary Care Reimbursement Service (PCRS) (http://www.hse.ie/eng/staff/PCRS/) with the remainder being described as private patients and able to see any general practitioner. All patients aged over 80 years and those below defined income levels (less than € 500 [£444] gross per week for a single person; € 900 [£798] gross per week for a couple) are registered with the PCRS and are described as ‘Medical Card’ eligible