. 2017 Mar 20;114(14):E2975–E2982. doi: 10.1073/pnas.1611428114

Table S1.

Correlations, z-scores, and P values from Steiger’s Z test

	snai1 (n = 125)					ctgf (n = 114)					wnt9a (n = 119)
Time, min	r₁₃	r₂₃	r₁₂	z	P value	r₁₃	r₂₃	r₁₂	z	P value	r₁₃	r₂₃	r₁₂	z	P value
4	0.18	−0.12	0.21	2.616	0.0075	0.31	−0.03	−0.02	2.634	0.0072	0.32	−0.20	0.05	4.171	1.08E-05
8	0.34	−0.04	0.18	3.410	4.14E-04	0.49	0.06	−0.08	3.406	4.51E-04	0.48	−0.12	−0.04	4.814	2.81E-07
12	0.43	0.03	0.27	3.837	6.00E-05	0.51	0.15	0.03	3.073	0.0016	0.53	−0.04	0.03	4.797	3.20E-07
16	0.50	0.09	0.35	4.309	5.08E-06	0.55	0.21	0.13	3.145	0.0013	0.56	0.01	0.11	4.862	2.04E-07
20	0.53	0.13	0.39	4.417	2.73E-06	0.56	0.21	0.19	3.265	7.81E-04	0.54	0.03	0.17	4.690	5.71E-07
24	0.56	0.16	0.39	4.454	2.30E-06	0.56	0.21	0.22	3.343	5.66E-04	0.52	0.02	0.19	4.555	1.26E-06
28	0.57	0.20	0.37	4.166	1.21E-05	0.56	0.20	0.23	3.472	3.29E-04	0.51	0.01	0.20	4.569	1.12E-06
32	0.57	0.22	0.34	3.893	4.97E-05	0.55	0.19	0.24	3.467	3.32E-04	0.49	0.00	0.20	4.555	1.19E-06
36	0.58	0.23	0.31	3.772	9.02E-05	0.54	0.18	0.24	3.404	4.30E-04	0.49	−0.02	0.21	4.685	5.26E-07
40	0.57	0.23	0.29	3.647	1.59E-04	0.53	0.17	0.22	3.366	5.05E-04	0.49	−0.03	0.19	4.726	4.10E-07
44	0.58	0.23	0.28	3.678	1.40E-04	0.52	0.17	0.19	3.254	8.00E-04	0.49	−0.03	0.16	4.669	6.07E-07
48	0.57	0.24	0.27	3.522	2.78E-04	0.49	0.15	0.16	3.073	0.0016	0.48	−0.04	0.13	4.554	1.25E-06
52	0.56	0.23	0.28	3.512	2.88E-04	0.46	0.14	0.14	2.756	0.0049	0.45	−0.05	0.12	4.320	4.88E-06

Correlations, z-scores, and P values from Steiger’s Z test are shown for Fig. 5 and Fig. S6. Here, we are testing whether the correlation between fold change and mRNA count is significantly different from the correlation between level and mRNA count. Steiger’s Z test is used to determine whether two nonindependent correlations are significantly different (39). Correlations are nonindependent when they share a term. In this case, the fold change and level are both correlated with the same term: mRNA count data. The correlations in the table are the following: r₁₃ is the correlation between fold change and mRNA count, r₂₃ is the correlation between level and mRNA count, and r₁₂ is the correlation between fold change and level, which is not the question of interest, but is necessary to restrict the level of deviation between the two correlations.