['To (1) examine the relationships between multiple poststroke mobility variables (gait speed, walking capacity, balance, balance self-efficacy, and falls self-efficacy) and activity and participation; and (2) determine which poststroke mobility variables are independently associated with activity and participation.', 'This is the primary analysis of a prospective cross-sectional study completed to understand the impact of mobility on activity and participation in people with chronic stroke.', 'University-based research laboratory, hospitals, and stroke support groups.', 'People (N=77) with stroke greater than 6 months ago were included in the study if they were referred to occupational or physical therapy for physical deficits as a result of the stroke, completed all stroke related inpatient rehabilitation, had residual functional disability, scored a ≥4 out of 6 on the short, 6-item Mini-Mental State Examination, and were between the ages of 50 and 85.', 'Not applicable, this is a cross-sectional data collection of 1 timepoint.', 'We measured activity and participation with the validated International Classification of Functioning, Disability and Health Measure of Participation and Activities. Other variables included gait speed (10-meter walk), walking capacity (6-minute walk), balance (Berg Balance Scale), balance self-efficacy (Activities Specific Balance Confidence Scale), and falls self-efficacy (Modified Falls Efficacy Scale).', 'Only balance self-efficacy was found to be independently associated with poststroke activity (β=-.430, P<.022, 95% confidence interval [CI], -.247 to -.021) and participation (β=-.439, P<.032, 95% CI, -.210 to -.010).'] Are balance and balance self-efficacy associated with activity and participation after stroke : a cross-sectional study in people with chronic stroke?