Table 1.

Proliferation density in the olfactory epithelium during postnatal development measured as BrdU-labeled basal cells per length

Age	Number of animals			Cells per mm	SE	Significance pvalue^*	Counted units	Counted mm
Age	m	f	N	Cells per mm	SE	Significance pvalue^*	Counted units	Counted mm
P1–3	2	2	4	150.88	4.51		662	158.09
P11	0	1	1	118.65			415	99.10
						0.002^1-160
P21	4	2	6	69.85	2.19		5075	1211.91
						0.0001
P40	4	5	9	36.81	3.04		5340	1275.19
						0.0001
P66	3	4	7	24.24	1.44		4264	1018.24
						0.001
P105	4	1	5	16.80	0.25		4271	1019.91
						0.018
P181	3	0	3	10.16	0.76		3912	934.19
						0.05
P333	3	0	3	8.03	0.24		5093	1216.21

m = males; f = females; N = total number of animals.
↵* Mann-Whitney U test, U = 0 among all age groups; the values did not overlap between age groups, so that p depends only on the number of animals.
↵F1-160 P1–3 and P11 were combined as one group for the calculation of thep value.