Spatial dynamics of TB within a highly urbanised Asian metropolis using point patterns

Area of Science:

• Epidemiology
• Public Health
• Spatial Analysis

Background:

• Singapore, a high-income nation, faces a resurgence in tuberculosis (TB) incidence since 2008, despite the Singapore Tuberculosis Elimination Program (STEP).
• The underlying causes for this rising TB trend in residents remain undetermined.
• Understanding TB epidemiology is crucial for public health strategies in high-prevalence regions.

Purpose of the Study:

• To investigate the epidemiological trends of tuberculosis (TB) in Singapore.
• To identify the key factors contributing to the recent increase in TB incidence among residents.
• To analyze spatial patterns and risk factors associated with TB cases.

Main Methods:

• Spatial analysis of over 30,000 tuberculosis cases reported between 1995 and 2011.
• Utilized spatial point pattern methodology to assess spatial risk and clustering.
• Examined residential addresses to identify geographical epidemiological patterns.

Main Results:

• The primary driver of increasing resident TB incidence in Singapore is the aging population.
• A significant rise in reported cases is linked to the growing demographic of individuals over 65 years.
• Spatial analysis revealed specific risk areas and clustering patterns within Singapore.

Conclusions:

• The aging demographic, characterized by low fertility and mortality rates, is the principal factor behind the escalating TB rates.
• Projected substantial growth in the elderly population suggests a continued rise in tuberculosis incidence.
• Public health interventions must consider demographic shifts, particularly the aging population, to effectively manage and control TB.