s / Osteoarthritis and Cartilage 22 (2014) S57–S489 S185 Results: All subjects completed the sensory measures and the five first functional tasks resembling conditions of daily life (ADL). 20 subjects (39%) were not able to perform all hop tests, mainly due to hesitation or for safety reasons (close to surgery). No difference was observed in knee position score between men and women for any of the functional tasks. Whenmen and womenwere pooled, no correlationwas found between TDPM and knee position for the ADL tasks. Poorer TDPMwas associated with a knee medial to foot position during the drop jump (rs 1⁄4 0.409, P 1⁄4 0.013). No relation was found between VPT at MTP1, MM or MF and medio-lateral knee position in the pooled group. When women were analyzed separately, no relation was found between TDPM and knee position for the ADL tasks. For the hop tests, poorer TDPM was associated with a knee medial to foot position during drop jump (rs1⁄4 0.469, P 1⁄4 0.106) and cross over hop (rs 1⁄4 0.697, P 1⁄4 0.012). Worse vibration sense was associated with a knee medial to foot position for stair descending, stair ascending and forward lunge, (rs 1⁄4 0.467–0.606, P 1⁄4 25% for the total group). Severe back pain, severe neck/shoulder pain, severe elbow, wrist or hand pain, cancer and malignant diseases, incontinence of urine, and vision impairment in short distances were reported by 15–25% of the patients in the total group. In both THA and TKA severe back pain (reported in 19%) and dizziness in combination with falling (reported in 6%) were most commonly associated with all four outcomes. Reported comorbidities were more associated with worse outcome in physical functioning and quality of life than with worse pain. Poor outcome increases with number of comorbidities, and in patients with 5 or more comorbidities associations were seen with all outcomes. Factors in the best fit association model for the total group of patients with THA and TKA for the different outcomes are: Dizziness in combination with falling, severe back pain, cancer and malignant diseases, and BMI for HOOS/KOOS subscale pain; Dizziness in combination with falling, vision impairments in long distances, severe back pain, severe neck/ shoulder pain, and BMI for HOOS/KOOS subscale physical functioning; incontinence of urine, severe back pain, sex, severe neck/ shoulder pain, BMI, and age for the SF36 physical component scale; dizziness in combination with falling, (consequences) of stroke, migraine , and incontinence of urine for the SF36 mental component scale. Conclusions: Various comorbidities, different in THA and TKA were associated with outcome, especially with physical functioning and the