Table 2.

Correlating PGE2 levels or proliferation with tumor development

% reduction from UV control
experiment	treatment	Dose (ppm)	PGE2	BrdU	Tumors/mouse
#1	nap	100	85	53	26
	nap	400	94	56	63
	NO-nap	100	65	20	0
	NO-nap	400	82	56	52
#2	asp	60	31	65	19
	asp	750	82	47	50
	NO-asp	108	32	34	0
	NO-asp	1350	91	37	33
#3	Sul	25	79	46	50
	Sul	150	96	71	94
r = 0.7236a
r = 0.7096b

Values represent the % reduction from UV controls for each experiment (the number of tumors/mouse was set at 100%). The data were used to calculate correlation coefficients. The statistical differences are shown by superscript:

^ap=0.0180

^bp=0.0215.

Multiple regression analysis gave r²=84.80% with a p value of 0.0014.