Table 2.

Alpha-smooth muscle actin staining scores of renal biopsy tissues sampled repeatedly from 6 PSAGN patients and their characteristics.

	Patient Age (Years)	Acute Phase: Duration between Onset to First Biopsy (Days)	Convalescent Phase: Duration between Onset to Second Biopsy (Years)	Glomerular Staining Score		Interstitial Staining Score
				First Biopsy	Second Biopsy	First Biopsy	Second Biopsy
Progression into CKD (n = 3)	39.3 ± 6.0	19.7 ± 9.9	3.0 ± 1.0	2.7 ± 1.2	0.7 ± 0.6	3.7 ± 0.6	3.0 ± 1.0
Cured (n = 3)	35.7 ± 7.8	23.3 ± 12.1	5.1 ± 4.5	3.0 ± 1.0	0.7 ± 0.6	2.7 ± 0.6	1.7 ± 0.6

PSAGN: poststreptococcal acute glomerulonephritis; CKD: chronic kidney disease. Data are expressed as the mean ± SD. Sections stained for α-SMA as described in Figure 4 were evaluated as follows. Glomerular staining intensities were semiquantitatively graded as 0 to 4, as previously reported by Alpers et al. [48], whereas interstitial staining intensities were graded semiquantitatively as 1 to 4 using the following scale: 1 = positive area < 10%; 2 = 10% to 20%; 3 = 20% to 30%; 4 ≥ 30%.