PREVALENCE OF PARKINSON’S DISEASE IN AL-KADHIMIYA DISTRICT (BAGHDAD CITY): COMMUNITY-BASED STUDY

Abstract

Background: Parkinson's disease is a chronic neurodegerative disorder affects mostly people above 40ys. Studying its prevalence is crucial for health public planning especially as worldwide communities are getting older. There are some worldwide variations in the estimated prevalence rates and the figures are unknown in our country.Objective: To estimate the prevalence of Parkinson's disease in Al-Kadhimiya district.Methods: Community-based study was conducted as cross-sectional survey on random sample of the population of the district. Suspected cases of Parkinson's disease identified during home visits were referred to the neurological department at the University Hospital of Iraqi Medical College in order to confirm the diagnosis of the senior neurologist. Diagnosis is made by identifying at least two cardinal features of the disease (resting tremor, bradykinesia, rigidity and postural instability) in the absence of signs of secondary Parkinsonism.Results: 25 cases of Parkinson’s disease collected from a random sample of 22,988 individuals (13 were males, 23 were females. 6 lived in rural areas and 19 in urban). Three cases (12%) were newly diagnosed. Tremor was the predominant symptom of onset (80%). 19 cases had bilateral involvement of the disease, in spite of the unilateral onset of all cases. The crude prevalence rate was 108.75 per 105 populations. Age adjusted prevalence rates showed constant increase with age. Gender-adjusted prevalence rates were calculated for male 114/105 populations and for 103/105 populations. Residency-adjusted prevalence rates were 114,3 and 94,3 per 105 populations for urban and rural living respectively.Conclusion: Prevalence rate of Parkinson’s disease is just lower than the figures in Europe and North America, but higher than those of Africa and China. It increases constantly with increasing age. There was no significant gender or rural difference in the prevalence rates. The prevalence figure can be applied to the population of Baghdad City because of the similar population structure and characteristics to those of Al-Kadhimiya district.Keywords: Parkinson disease, prevalence, Baghdad, cross sectional study