Income-related inequalities and inequity in access to inpatient healthcare in rural Nigeria

Based on 2022 data from 624 rural Nigerian households, this study reveals that access to inpatient healthcare is significantly stratified by income and region, with poorer households disproportionately utilizing public primary and secondary facilities while wealthier groups access tertiary and private care, driven primarily by economic status and geographic location.

The Gist

Imagine Nigeria's rural healthcare system as a massive, multi-level shopping mall where people go to buy "health" instead of clothes or gadgets. This mall has four main wings:

1. The Neighborhood Corner Store (Public Primary Care)
2. The Local Supermarket (Public Secondary Care)
3. The Luxury Department Store (Public Tertiary Care)
4. The Exclusive Private Boutique (Private Facilities)

A recent study looked at how different families in rural villages navigate this mall. The researchers wanted to know: Does having more money change who gets to enter which wing?

The Big Discovery: The "Wallet" Gatekeeper

The study found that your wallet acts like a bouncer at the door. It decides where you can go and where you are pushed away.

• The "Poor-Friendly" Wings (Primary & Secondary):
  When it comes to the basic "Corner Store" and the "Local Supermarket" (public hospitals), the study found a surprising twist. The richer families were actually less likely to use these public facilities. It's as if the wealthy families have private cars and prefer to skip the local market, while the poorer families rely on it.

  • The Analogy: Imagine a free community park. The study found that the rich people in the village are avoiding this park, perhaps because they have private gyms, while the poor are the ones filling the benches. This is a "pro-poor" situation, but it highlights that the poor are stuck relying on the basics.

• The "Rich-Only" Wings (Tertiary & Private):
  Now, look at the "Luxury Department Store" (advanced public hospitals) and the "Private Boutique." Here, the pattern flips completely. The richer the family, the more likely they are to walk through these doors.

  • The Analogy: Think of these facilities as VIP lounges. The study found that the "VIP pass" is essentially a high bank balance. The poor are often left standing outside the velvet rope, even when they are sick, because they can't afford the "cover charge" or the travel costs to get there.

The "Need" vs. "Wealth" Problem

The researchers asked a crucial question: Is this unfair?

In a fair world, the person who is sick should get the treatment, regardless of how much money they have. This is called "horizontal equity."

• The Reality: The study found that money, not sickness, is the main driver.
  • If you are poor and have a serious illness, you might be stuck at the "Corner Store" even if you need the "Department Store."
  • If you are rich and have a minor issue, you might still be able to access the "VIP Lounge" while the poor suffer.

The study used a special math tool (like a balance scale) to measure this. They found that for the advanced and private hospitals, the scale is heavily tipped toward the rich. The "unfairness" (inequity) is huge here.

Why Is This Happening?

The study broke down the reasons, like peeling an onion to find the core. The two biggest layers causing this inequality are:

1. Economic Status (The Wallet): Simply put, if you don't have money, you can't travel far or pay for the "better" options.
2. Region of Residence (The Map): Where you live matters just as much as what you have. Living in a remote village is like living in a town with no roads to the mall; even if you have money, getting there is a nightmare.

The Bottom Line

Think of the healthcare system in rural Nigeria as a race.

• The poor are running on a track with potholes, trying to reach a finish line that keeps moving away from them. They are forced to use the basic public facilities, which are often crowded and under-resourced.
• The rich are driving a sports car on a smooth highway, zooming straight to the advanced and private facilities.

The Conclusion: The study tells us that the system isn't working based on who needs help the most; it's working based on who can pay the most. To fix this, the "bouncers" (the system) need to stop checking wallets at the door and start checking medical needs instead. The gap between the rich and poor isn't just about money; it's about who gets to survive and thrive.

Technical Summary

Technical Summary: Income-related Inequalities and Inequity in Access to Inpatient Healthcare in Rural Nigeria

1. Problem Statement

Despite global recognition of healthcare inequality as a systemic challenge, there is a paucity of empirical evidence regarding disparities in access to formal inpatient healthcare specifically within the Nigerian context. Previous research has largely focused on specific services or sub-domains of care, leaving a critical gap in understanding how household wealth influences access to inpatient facilities across different levels of the health system (primary, secondary, and tertiary) and ownership types (public vs. private) in rural Nigeria. This study addresses the need to quantify both income-related inequalities and need-adjusted inequities to inform policy interventions aimed at achieving universal health coverage.

2. Methodology

The study employed a quantitative, cross-sectional design utilizing data collected in 2022 from 624 rural households in Nigeria. The data was sourced from a human capital research project commissioned by the African Economic Research Consortium (AERC).

• Variables Analyzed: The analysis incorporated demographic characteristics, household income, consumption expenditure, self-reported health conditions (need factors), region of residence, and utilization of inpatient care.
• Statistical Measures:
  • Concentration Index (CI): Used to measure income-related inequality in healthcare access. A negative CI indicates pro-poor inequality (access concentrated among the poor), while a positive CI indicates pro-rich inequality.
  • Horizontal Inequity (HI) Index: Used to assess need-adjusted inequity. This metric isolates the portion of inequality attributable to non-need factors (e.g., wealth, geography) after controlling for health needs.
  • Decomposition Analysis: Applied to identify the specific determinants (e.g., economic status, region) contributing to the observed inequalities.

3. Key Contributions

• Granular Segmentation: Unlike broader studies, this research disaggregates inpatient access by facility level (primary, secondary, tertiary) and ownership (public vs. private), revealing distinct patterns of inequality across the health system spectrum.
• Differentiation of Inequality vs. Inequity: The study rigorously distinguishes between raw inequality (CI) and horizontal inequity (HI), providing a clearer picture of whether disparities are driven by legitimate health needs or systemic biases against the poor.
• Contextual Evidence: It provides the first robust evidence on rural inpatient access disparities in Nigeria, a critical step for a country striving to improve its health system performance.

4. Key Results

The study revealed a complex landscape of access patterns driven by socioeconomic status:

• Utilization Rates:

  • Public Primary: 81.4% of respondents accessed care here.
  • Public Secondary: 49.9% accessed care here.
  • Public Tertiary: 18.4% accessed care here.
  • Private Facilities: 32.7% accessed care here.

• Direction of Inequality:

  • Pro-Poor Inequalities: Access to public primary and public secondary care was significantly higher among poorer households.
    • Primary: CI = -0.1054; HI = -0.0374.
    • Secondary: CI = -0.1063; HI = -0.0377.
  • Pro-Rich Inequalities: Access to public tertiary and private facilities was significantly concentrated among wealthier households.
    • Tertiary: CI = 0.2382; HI = 0.3660 (indicating strong inequity).
    • Private: CI = 0.1502; HI = 0.2180.

• Decomposition Findings:

  • Non-need factors were the primary drivers of inequality across all facility types.
  • Household economic status and region of residence were identified as the largest contributors to these disparities.
  • Notably, the HI index for tertiary care (0.3660) suggests that even after adjusting for health needs, wealth remains a massive barrier to accessing advanced public care.

5. Significance and Implications

The findings highlight a dual burden of inequality in rural Nigeria:

1. Vertical Segregation: The poor rely heavily on under-resourced primary and secondary public facilities, while the wealthy bypass these for tertiary public and private care.
2. Systemic Inequity: The significant HI indices indicate that access is not solely determined by health needs but is heavily skewed by economic capacity and geography.

Policy Implications:

• Resource Allocation: Interventions must target the "pro-rich" bias in tertiary and private care to ensure the poor can access advanced treatment.
• Infrastructure Development: Improving the quality of primary and secondary public facilities is crucial, as these are currently the main points of access for the poor but may suffer from under-resourcing.
• Financial Protection: Policies should focus on reducing financial barriers (e.g., through insurance schemes or subsidies) to prevent economic status from dictating the level of care a patient receives.
• Regional Equity: Addressing regional disparities is essential, as location significantly compounds economic barriers to access.

In conclusion, the study demonstrates that without targeted interventions addressing economic and geographic barriers, rural Nigerians will continue to face fragmented access to inpatient healthcare, where the level of care received is determined more by wealth than by medical necessity.