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. 2025 Nov 28;17(11):e97999. doi: 10.7759/cureus.97999

Table 2. Kidney Function Loss in Control Patients Receiving Optimized Supportive Care Across Different IgAN Trials.

UPCR = Urine protein-to-creatinine ratio, UACR = Urine albumin-to-creatinine ratio, eGFR = Estimated glomerular filtration rate, IgAN = IgA nephropathy, RAASI = Renin-angiotensin-aldosterone system inhibitor, SD = Standard deviation, CI = Confidence interval

Trial Treatment Arm n Age (years) Systolic BP (mm Hg) Diastolic BP (mm Hg) UPCR, g/g Median UACR, g/g (IQR) Median Proteinuria, g/24h (IQR) eGFR (mL/min/1.73 m²) Median time since IgAN diagnosis (years) Total eGFR slope (mL/min/1.73 m²/year)
Manno et al. [38] Active control (ramipril) 49 35 (11) 123 (8) 82 (7) N/A N/A 1.5 (1.4–2.3) 98 (28) ≤1 year before randomization –6.2 (SD±13.3)
TESTING [39] Placebo + RAASI 246 37 (29–46) 125 (116–131) 80 (74–86) N/A N/A 1.9 (1.4–2.9) 59 (48–72) 0.4 (0.3–1.2) –5.0 (95% CI –6.1 to –3.9)
STOP-IgAN [40] 10-year results RAASI 80 45 (12)b 126 (10)b 78 (8)b 1.1 (0.6)b 1.1 (0.6)b 1.7 (0.8)b 59 (27) N/A –2.7 (SD±2.0)
PROTECT [41] Active control (irbesartan) 202 45 (12) 130 (12) 83 (11) 1.2 (0.9–1.7) 1.2 (0.9–1.7) 1.8 (1.3–2.6) 57 (24) 4.0 (1.0–10.0) –3.9 (95% CI –4.6 to –3.1)
DAPA-CKD [42] Placebo + RASI 133 50 132 (14) 84 (12) N/A N/A N/A 43 (8) N/A –4.7 (SD±0.5)
NefigArd [43] Placebo + RASI 182 42 (34–49) 124 (117–130) 79 (74–84) 1.3 (0.9–1.7) 1.3 (0.9–1.7) 1.8 (1.0–2.5) 55 (46–64) 2.6 (0.6–6.5) –5.4