Table 1.

Comparison of growth factor expression between the i-PRF and PRF groups among young males (YMs), old males (OMs), young females (YFs), and old females (OFs)

	Group	N	Mean	SD	T	P
b-FGF	YM-i-PRF	3	0.22	0.01	-0.472	0.661
	YM-PRF	3	0.23	0.02
VEGF	YM-i-PRF	3	0.65	0.02	3.195	0.033*
	YM-PRF	3	0.58	0.03
EGF	YM-i-PRF	3	0.41	0.01	-1.909	0.129
	YM-PRF	3	0.42	0.01
TGF Beta	YM-i-PRF	3	0.38	0.01	23.992	0.001*
	YM-PRF	3	0.24	0.01
PDGF-AB	YM-i-PRF	3	0.99	0.02	2.345	0.079
	YM-PRF	3	0.86	0.09
b-FGF	OM-i-PRF	3	0.14	0.01	-7.238	0.002*
	OM-PRF	3	0.2	0.01
VEGF	OM-i-PRF	3	0.34	0.01	-8.615	0.001*
	OM-PRF	3	0.42	0.01
EGF	OM-i-PRF	3	0.28	0.05	0.479	0.657
	OM-PRF	3	0.27	0.01
TGF Beta	OM-i-PRF	3	0.27	0.01	-1.851	0.138
	OM-PRF	3	0.3	0.02
PDGF-AB	OM-i-PRF	3	0.59	0.15	0.189	0.859
	OM-PRF	3	0.58	0.04
b-FGF	YF-i-PRF	3	0.17	0.01	-1.502	0.207
	YF-PRF	3	0.19	0.03
VEGF	YF-i-PRF	3	0.55	0.01	-1.488	0.211
	YF-PRF	3	0.57	0.03
EGF	YF-i-PRF	3	0.32	0.02	-1.917	0.128
	YF-PRF	3	0.34	0.01
TGF Beta	YF-i-PRF	3	0.23	0.02	-6.404	0.003*
	YF-PRF	3	0.32	0.01
PDGF-AB	YF-i-PRF	3	0.43	0.03	-20.744	0.001*
	YF-PRF	3	0.8	0.01
b-FGF	OF-i-PRF	3	0.22	0.02	0.804	0.467
	OF-PRF	3	0.21	0
VEGF	OF-i-PRF	3	0.64	0.01	8.326	0.001*
	OF-PRF	3	0.45	0.04
EGF	OF-i-PRF	3	0.35	0.02	2.252	0.087
	OF-PRF	3	0.3	0.04
TGF Beta	OF-i-PRF	3	0.41	0.01	13.535	0.001*
	OF-PRF	3	0.31	0.01
PDGF-AB	OF-i-PRF	3	0.94	0.03	7.886	0.001*
	OF-PRF	3	0.58	0.08

*Statistical significance set at 0.05; N: Number of samples; and SD: Standard deviation