Table 1.

Slope estimates for linear regressions in Fig. 2

	Metyrapone				Hypoglycemia
	Horse 1	Horse 2	Horse 3	Overall	Horse 1	Horse 2	Horse 3	Overall
Slope of ACTH on cortisol	−1.41	−7.2	−0.37	−3.0	−0.23	−0.54	−9.9	−3.6
	(0.26)	(2.4)	(1.2)	(0.90)	(0.04)	(0.85)	(3.3)	(1.1)
	df = 12	df = 5	df = 9	df = 5	df = 6	df = 6	df = 4	df = 4
	(a)	(b)	(NS)	(a)	(a)	(NS)	(b)	(b)
Slope of CRH on cortisol	−0.98	−1.2	−0.13	−0.76	−0.11	+0.94	−2.4	−0.51
	(0.22)	(0.37)	(0.16)	(0.15)	(0.048)	(0.63)	(1.1)	(0.41)
	df = 12	df = 52	df = 9	df = 5	df = 6	df = 6	df = 4	df = 4
	(a)	(b)	(NS)	(a)	(b)	(NS)	(b)	(NS)
Slope of AVP on cortisol	+0.09	−5.1	−0.30	−1.8	−0.044	−0.040	−0.025	−0.034
	(0.25)	(2.2)	(0.90)	(0.81)	(0.015)	(0.027)	(0.011)	(0.011)
	df = 12	df = 5	df = 9	df = 5	df = 6	df = 6	df = 4	df = 4
	(NS)	(b)	(NS)	(b)	(b)	(NS)	(b)	(b)

Least-squares linear regression-estimated slopes, in parentheses their se values errors, degrees of freedom (df), and P values (testing that slope is negative against its being nonnegative) for data shown in Fig. 2 (left metyrapone, right hypoglycemia). The overall estimate (fourth and eighth columns) is the average estimate for the three animals. NS, Not significant. 

^aP < 0.01. 

^bP < 0.05.