Table 1 Eligibility criteria

i. live in Australia;

ii. have an unreplaced (native) hip or knee joint that meets the National Institute for Health and Care Excellence clinical criteria for OA: [12]

a. aged 45 years or over;

b. activity-related pain at the joint;

c. joint morning stiffness that lasts ≤ 30 min or no morning stiffness at the joint

iii. history of pain at the joint for ≥ 3mths; and

iv. joint pain on most days of the past month;

v. have access to a computer with internet connection and an email address; and

vi. able to give informed consent and willing to commit to all study evaluation and assessment procedures

i. self-reported systemic arthritis (e.g., rheumatoid arthritis, gout);

ii. scheduled for lower limb joint surgery in the next 13 weeks;

iii. completed an online education course about OA that involved at least 2 h of learning in total in the past 12 months; and/or

iv. unable to easily read and understand English