Table 3.

Podometric values for stages of glomerular development

	Immature stage	Mature stage <38 weeks	Mature stage ≥38 weeks
Glomerular volume (μm3 x 106)	0.13 ± 0.07	0.35 ± 0.08	0.60 ± 0.19
	(0.03–0.24)	(0.26–0.50)	(0.28–0.90)
Podocyte number per glomerulus	326 ± 154	584 ± 131	589 ± 166
	(71–549)	(406-850)	(393–1048)
Podocyte density (per 106 μm3)	2,702 ± 451	1,870 ± 250	1,166 ± 310
	(1,731–3,649)	(1,375-2,253)	(696–1732)
Total podocyte volume (x103 μm3)	41.5 ± 23.4	136.0 ± 45.3	195.1 ± 81.7
	(8.2–80.8)	(86.8–260.0	(64.1–320.8)
Average podocyte volume (μm3)	131 ± 36	233 ± 64	335 ± 136
	(76–215)	(143–397)	(122–583)

“Immature stage” of development is at the pre-capillary loop stage. “Mature <38 weeks” includes all glomeruli at the capillary loop and later stages of development in kidneys before 38 weeks’ gestation. “Mature stage >38 weeks” includes all glomeruli at the capillary loop and later stages of development in kidneys at ≥38 weeks’ gestation. Values are mean ± SD with the range shown in parentheses. Total podocyte volume is the GLEPP1-positive area multiplied by the glomerular volume to give an estimate for the average volume of all podocytes present in glomeruli