OBJECTIVE: /st> To assess the impact of different subsets of symptomatic hand osteoarthritis (OA) on pain and disability. METHODS: /st> From 308 patients with hand OA a group with... Show moreOBJECTIVE: /st> To assess the impact of different subsets of symptomatic hand osteoarthritis (OA) on pain and disability. METHODS: /st> From 308 patients with hand OA a group with carpometacarpal joint (CMCJ) symptoms only (group I, n=20) was identified as well as groups with symptoms at the interphalangeal joints (IPJs) only (group II, n=138), and symptoms at both sites (group III, n=150). Hand pain and function, assessed with the AUSCAN, were compared between groups using linear mixed models. Radiological OA was assessed using the Kellgren-Lawrence grading scale. RESULTS: /st> Mean (SD) AUSCAN scores for groups I, II and III were 23.1 (11.7), 18.3 (11.9) and 26.4 (12.5), respectively. After adjustment for age, gender, body mass index, family effects and number of symptomatic hand joints, significant differences in AUSCAN scores of 7.4 (95% CI 1.8 to 13.0) between groups I and II, and 5.7 (95% CI 2.7 to 8.6) between groups II and III were found. AUSCAN scores were 5.8 (95% CI 3.1 to 8.6) higher for patients with versus patients without CMCJ symptoms. Kellgren-Lawrence scores did not differ between groups. CONCLUSION: /st> In symptomatic hand OA, CMCJ OA contributes more to pain and disability than IPJ OA. Hence, treatment of CMCJ OA should be emphasised, even if it coincides with IPJ OA. Show less
BACKGROUND: /st> Tibiofemoral alignment has a role in knee osteoarthritis (OA), but which factors contribute to alignment is unknown. OBJECTIVE: /st> To investigate familial aggregation of... Show moreBACKGROUND: /st> Tibiofemoral alignment has a role in knee osteoarthritis (OA), but which factors contribute to alignment is unknown. OBJECTIVE: /st> To investigate familial aggregation of tibiofemoral alignment in participants of the GARP (Genetics ARthrosis and Progression) study. METHODS: /st> The tibiofemoral anatomical angle on semifiexed knee radiographs was measured in sibling pairs (mean age 60 years, 81% women) with primary OA with multiple joint involvement. Radiographic OA was assessed according to the Kellgren-Lawrence (KL) method. Heritability estimates of the tibiofemoral angle were calculated by comparing twice the betweensibling variance with the total variance; adjustments were made for age, gender, body mass index, history of meniscectomy, lower limb fracture and in analyses including all knees, for KL score. RESULTS: /st> 360 subjects representing 180 families were studied. The mean (SD) tibiofemoral angle of right and left knees in the probands was 182.7 (2.9) degrees and 182.8 (2.6) degrees , respectively; similar angles were measured in the siblings. Radiographic knee OA (KL score >/=2) was present in 27% of the knees. Stratified analyses in sib pairs with non-osteoarthritic right or left knees showed adjusted heritability estimates of the tibiofemoral angle of the right and left knees of 0.42 (95% CI 0.02 to 0.82) and 0.56 (95% CI 0.19 to 0.93). In addition, adjusted heritability estimates of the tibiofemoral angle in all right and left knees were calculated, being 0.48 (95% CI 0.18 to 0.78) and 0.50 (95% CI 0.21 to 0.79), respectively. CONCLUSION: /st> The alignment of the tibiofemoral joint is influenced by familial factors, implying that tibiofemoral malalignment may add to the genetic predisposition for knee OA development. These results need to be confirmed in other study populations. Show less
