Cross-Sectional Study of Microalbuminuria and Subclinical TargetOrgan Damage in Essential Hypertension

Q: What are the key findings of this study?

Microalbuminuria (present in 43.6% of hypertensive patients) was associated with significantly higher left ventricular mass index (118.7 vs 102.3 g/m²; MD 16.4 g/m², p<0.0001) and multi-organ damage.

Q: What is the clinical evidence from this study?

Study design: Cross-Sectional. Population: Essential hypertension (n=140). Intervention: Microalbuminuria (UACR 30-300 mg/g) vs. Normoalbuminuria (microalbuminuria absent). Primary outcome: Left ventricular mass index (LVMI, g/m²) (MD 16.4 g/m², 95% CI 9.58 to 23.22, p=<0.0001).

Q: What does this research mean for the field?

Microalbuminuria is prevalent in essential hypertension and is significantly associated with subclinical multi-organ damage, including higher left ventricular mass index, increased carotid intima-media thickness, reduced eGFR, and hypertensive retinopathy. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

Q: What question did this study set out to answer?

To evaluate the prevalence of microalbuminuria in patients with essential hypertension and determine its association with subclinical target-organ damage involving the heart, kidneys, vasculature, and retina.

doi:10.25258/ijddt.16.70s.103

October 15, 2026International Journal of Drug Delivery TechnologyOpen Access

Cross-Sectional Study of Microalbuminuria and Subclinical TargetOrgan Damage in Essential Hypertension

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Key result

Microalbuminuria is linked to ~16 g/m² higher LVMI in hypertensive patients.

MD +16.4 g/m²
95% CI 9.58 to 23.22
P<0.0001
n=140

Why the study?

Microalbuminuria reflects generalized vascular damage in essential hypertension and may predict subclinical cardiac, vascular, and retinal involvement before overt clinical complications arise. This study evaluated its prevalence and association with subclinical target-organ damage.

Is microalbuminuria associated with increased subclinical cardiac, vascular, renal, and retinal target-organ damage in adult patients with essential hypertension?

Key Points

To evaluate the prevalence of microalbuminuria in patients with essential hypertension and determine its association with subclinical target-organ damage involving the heart, kidneys, vasculature, and retina.
Hospital-based cross-sectional study conducted among 140 adult patients with essential hypertension.
Assessed microalbuminuria via urinary albumin-to-creatinine ratio (UACR, 30–300 mg/g), cardiac geometry by echocardiographic left ventricular mass index (LVMI), vascular remodeling by carotid intima-media thickness (CIMT) ultrasonography, and retinal changes via fundoscopy.
Microalbuminuria was present in 43.6% (61/140) of patients, occurring more frequently in those with hypertension duration ≥5 years (55.9% vs 34.6%, p=0.0118) and uncontrolled blood pressure (53.7% vs 29.3%, p=0.0042).
Patients with microalbuminuria had higher rates of left ventricular hypertrophy (47.5% vs 22.8%, risk difference +24.7%, p=0.0021), elevated CIMT >0.8 mm (55.7% vs 26.6%, risk difference +29.2%, p=0.0005), and retinopathy (36.1% vs 16.5%, risk difference +19.6%, p=0.0079), with UACR correlating positively with LVMI (r=0.38) and CIMT (r=0.34) and negatively with eGFR (r=−0.41).

Study Design

Type

Cross-Sectional (n=140)

Multicenter

No

Structured PICO

Is microalbuminuria associated with increased subclinical cardiac, vascular, renal, and retinal target-organ damage in adult patients with essential hypertension?

P

Population

140 adults aged 30-70 years (45.7% female) with essential hypertension and free of diabetes, chronic kidney disease, or established cardiovascular disease evaluated in a cross-sectional study over 12 months.

E

Exposure

Presence of microalbuminuria, assessed via morning spot urine urinary albumin-to-creatinine ratio (UACR, 30-300 mg/g) measured by automated immunoturbidimetric assay

C

Comparator

Absence of microalbuminuria (normoalbuminuric essential hypertension patients, n=79)

O

Outcome

Prevalence of microalbuminuria and its association with subclinical target-organ damage involving the heart (left ventricular mass index [LVMI] and left ventricular hypertrophy [LVH] via 2D echocardiography), vasculature (carotid intima-media thickness [CIMT] via B-mode ultrasonography), kidneys (eGFR via CKD-EPI formula), and retina (hypertensive retinopathy grade via indirect ophthalmoscopy)surrogate

Main Result

Mean Difference: 16.4 (95% CI 9.58–23.22)

Absolute Event Rate: 118.7% vs 102.3%

p-value: p=<0.0001

Microalbuminuria is present in 43.6% of patients with essential hypertension and is strongly associated with subclinical cardiac, vascular, renal, and retinal target-organ damage, supporting its routine use for risk stratification.

Limitations

Cross-sectional design limits ability to establish temporal or causal relationships
Single-center hospital-based sample may over-represent patients with advanced or poorly controlled hypertension
Single spot urine samples used rather than serial 24-hour collections
Unmeasured confounders including dietary sodium intake, nocturnal BP variation, and medication adherence
Operator-dependent echocardiographic and ultrasonographic assessments
Lack of endothelial dysfunction and inflammatory biomarkers
Cross-sectional design limits the ability to establish temporal or causal relationships between microalbuminuria and subsequent target-organ damage
Hospital-based sample may represent patients with more advanced or poorly controlled hypertension, potentially limiting generalizability to the community
Single morning spot urine sample for albumin estimation rather than serial 24-hour collections, which might introduce measurement variability due to transient albuminuria
Potential confounders such as dietary salt intake, nocturnal BP variation, and medication adherence were not fully controlled
Echocardiographic and ultrasonographic assessments were operator-dependent, which could lead to minor inter-observer variations despite standardization
Biomarkers of endothelial dysfunction and inflammatory mediators were not included

Implication

Microalbuminuria may mark higher-risk hypertensive patients with subclinical damage; leaves open its incremental value for screening or risk stratification in prospective studies.

Abstract

Background: Microalbuminuria (MAU) is a well-established marker of endothelial dysfunction and early renal injury in essential hypertension.It reflects generalized vascular damage and may predict subclinical cardiac, vascular, and retinal involvement even before overt clinical complications arise.Objectives: To evaluate the prevalence of microalbuminuria in essential hypertension and its association with subclinical target-organ damage involving the heart, kidneys, vasculature, and retina.Methods: A hospital-based cross-sectional study was conducted among 140 adult patients with essential hypertension.Demographic, clinical, and biochemical data were collected.Microalbuminuria was measured using the urinary albumin-to-creatinine ratio (UACR, 30-300 mg/g).Echocardiography was performed to determine the left ventricular mass index (LVMI), carotid intima-media thickness (CIMT) was assessed by B-mode ultrasonography, and fundoscopic examination was used to grade hypertensive retinopathy.Patients were classified by hypertension severity and blood-pressure control status.Statistical analysis included t-tests, chi-square tests, and Pearson/Spearman correlations; p < 0.05 was considered significant.Results: Microalbuminuria was present in 43.6% of hypertensive subjects.Compared to those without MAU, affected patients were older (58.4 ± 9.7 vs 54.9 ± 9.1 years; p = 0.031), had higher LVMI (118.7 ± 21.5 vs 102.3 ± 18.9 g/m²; p < 0.0001), greater CIMT (0.86 ± 0.13 vs 0.78 ± 0.12 mm; p = 0.0003), and lower eGFR (74.1 ± 16.8 vs 82.7 ± 17.2 mL/min/1.73m²; p = 0.0035).The prevalence of LVH, elevated CIMT, and hypertensive retinopathy was also significantly higher in the microalbuminuric group (all p < 0.01).UACR correlated positively with LVMI (r = 0.38), CIMT (r = 0.34), and retinopathy grade (ρ = 0.29), and negatively with eGFR (r = -0.41).Microalbuminuria prevalence and severity rose steadily with increasing hypertension stage and poor BP control.Conclusion: Microalbuminuria is highly prevalent in essential hypertension and closely linked with subclinical multi-organ damage.Its presence identifies patients at higher cardiovascular and renal risk who warrant intensified blood-pressure management and follow-up.

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Cite This Study

A 2026 study conducted a cross-sectional in Essential hypertension (n=140). Microalbuminuria (UACR 30-300 mg/g) vs. Normoalbuminuria (microalbuminuria absent) was evaluated on Left ventricular mass index (LVMI, g/m²) (MD 16.4 g/m², 95% CI 9.58 to 23.22, p=<0.0001). Microalbuminuria (present in 43.6% of hypertensive patients) was associated with significantly higher left ventricular mass index (118.7 vs 102.3 g/m²; MD 16.4 g/m², p<0.0001) and multi-organ damage.

synapsesocial.com/papers/6ae28e75cbadf70daf6c423f https://doi.org/10.25258/ijddt.16.70s.103

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Cross-Sectional Study of Microalbuminuria and Subclinical TargetOrgan Damage in Essential Hypertension

Key Points

Study Design

Structured PICO

Main Result

Limitations

Implication

Abstract

Discussion

Cite This Study

Cross-Sectional Study of Microalbuminuria and Subclinical TargetOrgan Damage in Essential Hypertension

Key Points

Study Design

Structured PICO

Main Result

Limitations

Implication

Abstract

Discussion

Cite This Study

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