What Is the Longitudinal Profile of Impairments and Can We Predict Difficulty Caring for the Profoundly Affected Arm in the First Year Poststroke?

ABSTRACT

OBJECTIVES: To establish the longitudinal profile of impairments of body functions and activity limitations of the arm, and to evaluate potential predictors of difficulty caring for the profoundly affected arm poststroke. DESIGN: Prospective cohort study. SETTING: Stroke services. PARTICIPANTS: People unlikely to regain functional use of the arm (N=155) were recruited at 2 to 4 weeks poststroke, and followed up at 3, 6, and 12 months. Potential predictors at baseline were hypertonicity, pain, motor control, mood, sensation/perception, age, and stroke severity. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Difficulty caring for the arm (Leeds Arm Spasticity Impact Scale), pain, hypertonicity, range of movement, arm function, and skin integrity. Multivariable linear regression identified the best fitting model for predicting Leeds Arm Spasticity Impact Scale score at 12 months. RESULTS: There were 110 participants (71%) reviewed at 1 year. There was a large variation in the profile of arm functions and activity limitations. Inability or severe difficulty caring for the arm affected 29% of participants. Hypertonicity developed in 77%, with severe hypertonicity present in 25%. Pain was reported by 65%, 94% developed shoulder contracture, and 6% had macerated skin. Difficulty caring for the arm increased with age, greater level of hypertonicity, and stroke classification; collectively, these factors accounted for 33% of the variance in Leeds Arm Spasticity Impact Scale scores. CONCLUSIONS: At 1 year poststroke, there was a high incidence of impairments of body functions and activity limitations in people with a profoundly affected arm. Individual profiles were very variable and although some predisposing factors have been identified, it remains difficult to predict who is at greatest risk.