Association of chronic morbidities with new record during follow-up of osteoarthritis, and osteoarthritis or joint pain, in NorStOP and CiPCA.

NorStOP = North Staffordshire Osteoarthritis Project; CiPCA = Consultations in Primary Care Archive; COPD = chronic obstructive pulmonary disease; HR = Hazard ratio; CI = Confidence interval. Chronic morbidity defined as consultation for ischaemic heart disease, diabetes, COPD, asthma or depression prior to baseline. a No record of i) osteoarthritis and ii) osteoarthritis or joint pain in 2001 or 2002 (comparison) or in the 2 years prior to baseline survey (NorStOP). b Adjusted for age and gender. c Adjusted for age, gender and record of joint pain in 2001 or 2002 (comparison) or in the 2 years prior to baseline survey (NorStOP).