. Author manuscript; available in PMC: 2019 Aug 1.

Published in final edited form as: Soc Dev. 2018 Mar 13;27(3):543–554. doi: 10.1111/sode.12292

Table 1.

Bivariate correlations of variables of interest

	M (SD)	1	2	3	4	5
1. Age at age 3 (months)	42.1 (3.1)	–
2. Age at age 6 (months)	73.1 (9.6)	.12^*	–
3. Age 3 BI	.62 (.19)	−.09	.02	–
4. Age 6 BI	.60 (.05)	−.02	.00	.57^***	–
5. BDNF genotype	–	−.09	−.03	−.01	.03	–

Note:

p < .05;

^**

p < .01;

^***

p < .001.

Ns = 379–382. BI = behavioural inhibition; BDNF = brain derived neurotrophic factor.