Table 3.

Absolute changes in serum testosterone levels

	Baseline to end of RT			Baseline to 3 months post-RT
	All (n = 447)	WPRT (n = 386)	PORT (n = 61)	All (n = 371)	WPRT (n = 320)	PORT (n = 51)
Minimum	−608.07	−608.07	−293.95	−478.39	−478.39	−315.85
5th percentile	−270.00	−288.18	−178.67	−228.00	−240.50	−182.00
Q1	−109.00	−110.00	−57.64	−99.00	−100.50	−86.46
Median	−30.00	−35.29	−11.00	−34.00	−31.35	−41.00
Q3	38.62	40.00	29.00	32.00	41.61	15.00
95th percentile	162.00	172.00	125.00	160.00	169.00	65.00
Maximum	593.66	593.66	158.50	691.00	691.00	86.46
P-valuea	< .001	< .001	.128	< .001	< .001	< .001
P-valueb		.216			.277

PORT, prostate-only radiation therapy; Q1, first quartile; Q3, third quartile; RT, radiation therapy; WPRT, whole pelvis radiation therapy.

^aP-value from Wilcoxon signed-rank test comparing to 0.

^bP -value comparing WPRT vs. PORT from Wilcoxon test.