TABLE 2.

Comparison of % variance explained (R²) between simple and more complex regression models.

	No Time Shift Allowed		Time Shifts Allowed (0–8 d)
Subject	E Only	E + P + T	E Only	P Only	T Only	E + P + T	EPT + All Interactions
6	−0.92%	14.13%	16.06%	15.67%	6.36%	43.25%	63.53%
8	13.00%	14.01%	15.50%	3.49%	17.77%	30.82%	62.76%
9	−0.05%	18.35%	13.00%	12.17%	6.00%	30.74%	66.28%
14	−0.97%	13.10%	17.76%	9.31%	21.71%	34.10%	68.89%
15	3.32%	42.94%	15.71%	9.65%	21.62%	42.85%	66.89%
16	12.06%	39.16%	39.56%	12.54%	38.15%	59.34%	66.51%
17	−0.48%	27.77%	17.55%	33.38%	11.40%	52.47%	72.35%
19	37.33%	52.26%	48.61%	54.98%	5.53%	60.36%	78.09%
20	−0.08%	2.15%	26.46%	5.88%	19.87%	42.65%	60.44%
21	−1.41%	8.41%	11.57%	0.22%	4.62%	17.73%	50.51%
23	−0.48%	20.39%	0.06%	2.03%	14.46%	23.68%	59.70%
25	3.10%	18.55%	23.51%	9.94%	12.61%	45.24%	69.76%
26	3.81%	46.39%	18.11%	1.80%	19.68%	37.34%	59.03%
27	5.96%	18.09%	15.34%	14.47%	16.88%	41.11%	48.64%
29	1.41%	18.40%	15.59%	1.56%	13.28%	26.57%	57.28%
30	15.26%	66.56%	18.31%	24.39%	18.01%	48.71%	69.41%
33	4.94%	34.99%	13.32%	19.46%	13.56%	50.13%	72.68%
34	0.30%	22.89%	7.41%	16.11%	15.05%	40.06%	65.83%
35	−0.79%	9.77%	15.83%	6.13%	4.77%	29.27%	58.77%
36	−0.60%	23.53%	26.59%	9.66%	0.82%	32.71%	55.17%
37	11.78%	23.61%	14.28%	3.77%	9.90%	27.07%	51.12%
38	11.66%	34.23%	18.56%	15.16%	37.59%	49.79%	68.93%
Mean	5.37%	25.89%	18.58%	12.81%	14.98%	39.36%	63.30%

E, estradiol; P, progesterone; T, testosterone.