The Course of Functional Status and Muscle Strength in Patients With Late-Onset Sequelae of Poliomyelitis: A Systematic Review

Conclusions cannot be drawn from the literature with regard to the functional course or prognostic factors in late-onset polio sequelae. The rate of decline in muscle strength is slow, and prognostic factors have not yet been identified. Long-term follow-up studies with unselected study populations and age-matched controls are needed, with specific focus on prognostic factors.