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To obtain information on the socioeconomic, medical, and functional status of polio survivors, and to use these results as the preliminary data for establishing the middle-aged cohort of polio survivors.
The subjects were recruited based on the medical records of multiple hospitals and centers. They were assessed through a structured questionnaire over the phone. Post-poliomyelitis syndrome (PPS) was identified according to the specified diagnostic criteria. Differences between polio survivors with or without PPS were evaluated, and the risk factors for PPS were analyzed by the odds ratio (OR).
Majority of polio survivors were middle-aged and mean age was 51.2±8.3 years. A total of 188 out of 313 polio survivors met the adopted criteria for PPS based on the symptoms, yielding a prevalence of 61.6%. Mean interval between acute poliomyelitis and the development of PPS was 38.5±11.6 years. Female gender (OR 1.82; confidence interval [CI] 1.09-3.06), the age at onset of poliomyelitis (OR 1.75; CI 1.05-2.94), the use of orthoses or walking aids (OR 2.46; CI 1.44-4.20), and the history of medical treatment for paralysis, pain or gait disturbance (OR 2.62; CI 1.52-4.51) represented independent risk factors for PPS.
We found that the majority of Korean polio survivors entered middle age with many medical, functional, and social problems. Female gender, early age of onset of poliomyelitis, the use of orthoses or walking aids, and the history of medical treatment for paralysis, pain or gait disturbance were identified as the significant risk factors for PPS. A comprehensive and multidisciplinary plan should be prepared to manage polio survivors considering their need for health care services and the risk factors for late effects, such as PPS.
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The Postpoliomyelitis syndrome(PPS) is characterized by new neuromuscular symptoms such as muscle weakness, joint pain, fatigue, and occasional new neuromuscular impairments. Although the development of PPS shows individual differences, it usually occurs many years after the recovery from an acute paralytic poliomyelitis. The purpose of this study was to investigate the incidence and the clinical features of PPS.
The subjects were 33 patients(26 males and 7 females) who had partial recoveries of motor function, ten or more years of functional stabilities, and residual muscle atrophies. The mean age was 36.8⁑7.7 years with the range of 23∼59 years. The average onset age of acute poliomyelitis was 2.3⁑1.5 years. The questionnaires asking their current physical conditions and three major categories of PPS symptoms, weakness, fatigue, and pain were used.
As the sequelae of poliomyelitis, 66.7% of the subjects showed scoliosis and 39.4% had claw toes. Thirty six percents of the subjects were using orthoses including wheelchair, KAFO, and crutches.
According to the questionnaire study, 72.5% of subjects had at least one of the three major symptoms. And 36.4% of them reported all of three categories of PPS symptoms. The onset age of the new neuromuscular symptoms was 34.2⁑8.3 years which was about 32 years after the original acute poliomyelitis.
Further researches to investigate the importance and the impacts of proper managements and to develop educational plans for the PPS including exercise programs, cardiopulmonary and energy-conservation trainings are recommended.
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