A door-to-door survey to estimate the prevalence of Parkinsonism in Pakistan

Suliman Khan, Ghulam Nabi, Muhammad Naeem, Liaqat Ali, Peter A Silburn, George D Mellick, Suliman Khan, Ghulam Nabi, Muhammad Naeem, Liaqat Ali, Peter A Silburn, George D Mellick

Abstract

Introduction: Parkinson's disease (PD) occurs in all races and cultures, and population-related differences in frequency may provide etiological clues. The present study was designed to explore the prevalence of PD and Parkinsonism in Pakistan, the world's sixth most populous country, for which no published prevalence data are available.

Methods: We conducted a three-phase door-to-door survey in two districts of the Khyber Pakhtunkhwa province of Pakistan, to assess the prevalence of PD and Parkinsonism in a sample of 4,000 individuals aged 50 years and above.

Results: We identified 14 cases of Parkinsonism, eleven with a diagnosis of idiopathic PD. The overall prevalence estimates were 1.7/100 (95% confidence interval [CI]: 0.9-2.46) for Parkinsonism and 1.28/100 (95% CI: 0.6-1.94) for PD in persons aged 65 years and above. The age-standardized prevalence of PD (aged 65 years and above), normalized to the USA population in 2000, was 1.33/100, which is similar to that observed in other human populations. Of the total 14 cases, five were newly diagnosed and four had a family history of PD.

Conclusion: The estimated prevalence rates in Pakistan are similar to those observed in other human populations. The frequency of familial Parkinsonism is also equivalent to previous estimates.

Keywords: Parkinsonism; Parkinson’s disease; door-to-door survey.

Figures

Figure 1
Figure 1
The age-specific prevalence of iPD in Pakistan as assessed by our door-to-door survey. Abbreviation: iPD, idiopathic Parkinson’s disease.
Figure 2
Figure 2
Parkinsonism and self-reported non-Parkinsonism complications.
Figure 3
Figure 3
hospital-based healthy individuals’ responses to each question in the screening instrument.

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