Table 2.

Correlations between all variables used in Research questions 1 and 2

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
1. Urbanicity	–	.13	.06	−.07	−.01	−.02	−.04	−.48	−.13	–	−.05	−.07	.04	.01	–
2. BP	.07	–	.40	−.02	−.06	−.06	−.02	−.10	−.19	–	−.03	−.03	−.19	.02	–
3. EP	.18	.28	–	.04	.16	.08	.00	−.05	−.11	–	−.02	.02	.11	−.11	–
4. AUCi	.02	−.11	−.06	–	.44	.08	.03	.01	−.04	–	−.06	.19	.14	−.13	–
5. AUCg	−.14	−.01	.02	.15	–	.32	.01	−.06	−.12	–	−.13	.16	.19	−.23	–
6. CAR	–	–	–	–	–	–	−.35	−.02	.09	–	.03	.06	.14	−.04	–
7. Decline	−.19	−.02	.01	−.01	.68	–	–	.11	.10	–	.00	−.11	.08	.13	–
8. SES-E	−.43	−.16	−.13	.01	.16	–	.13	–	.40	–	.05	.08	−.03	−.00	–
9. SES-I	.08	.03	−.00	−.04	.00	–	−.02	.20	–	–	.20	.01	.00	−.03	–
10. SES-M	.64	.02	.17	−.01	−.09	–	−.11	−.13	−.09	–	–	–	–	–	–
11. Family SES	.14	.04	−.03	−.11	.10	–	.02	−.01	.24	.01	–	.01	.03	−.01	–
12. Age	.00	.09	.03	.08	.04	–	.01	−.08	.03	−.09	.03	–	−.02	−.11	–
13. Sex	−.01	−.07	.04	−.03	.10	–	.08	.13	.09	.06	.15	−.09	–	−.05	–
14. Season	.05	.12	−.07	.02	.02	–	.11	−.09	−.02	−.02	.12	.37	.01	–	–
15. Time	.13	−.00	.10	.06	.25	–	.31	−.05	.03	.11	.01	.04	−.20	.00	–

bold = p < .01; italics = p < .05.

Note. Correlations are indicated by Spearman’s coefficients. Coefficients in the top right half are from the JOiN study; coefficients in the bottom left half are from the BIBO study. BP = behavioral problems; EP = emotional problems; AUCi = area under the curve with respect to increase; AUCg = area under the curve with respect to ground; CAR = cortisol awakening response; SES = socioeconomic status; E = employment; I = income; M = multi-ethnicity; Time = time between basal cortisol 1 and basal cortisol 4