Table 4.

Baseline characteristics of the baseline-to-5-year poor function and disability outcomes analysis sample (n = 187 persons)

Person-based (n = 187):	Mean (SD) or number (%)
Age (years)	64.2 (9.7)
Female	147 (78.6%)
BMI (kg/m2)	28.6 (5.8)
K/L grade of the knee with worse baseline hip abductor strength
0	12 (6.4%)
1	30 (16.0%)
2	89 (47.6%)
3	27 (14.4%)
4	29 (15.5%)
PF joint space narrowing score of the knee with worse baseline hip abductor strength
0	52 (27.8%)
1	61 (32.6%)
2	41 (21.9%)
3	33 (17.6%)
WOMAC pain (0–20), higher indicating more severe pain	4.5 (3.5)
WOMAC function (0–68), higher indicating worse function	13.3 (11.3)
Hip abductor strength (worse of the two limbs) (Nm/kg)	0.77 (0.22)
Knee extensor strength (worse of the two limbs) (Nm/kg)	0.82 (0.28)
Chair-Stand-Rate (#/min)	20.40 (6.58)
LLFDI Total Function (0–100), higher indicating better function	61.88 (9.35)
LLFDI Basic LE Function (0–100)	71.56 (13.25)
LLFDI Advanced LE Function (0–100)	54.80 (12.94)
LLFDI Disability Frequency of Participation (0–100), higher indicating less disability	55.46 (6.69)
LLFDI Disability Limitation (0–100)	74.03 (12.84)
LLFDI Disability Instrumental Role Limitation (0–100)	73.28 (13.41)

Abbreviations: SD, Standard Deviation; BMI, Body Mass Index; K/L, Kellgren/Lawrence; PF, patellofemoral; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index; LLFDI, Late Life Function Disability Instrument