. Author manuscript; available in PMC: 2014 Apr 1.

Published in final edited form as: J Pers. 2013 Jan 11;81(2):119–129. doi: 10.1111/jopy.12000

Table 1.

Demographic Characteristics of the Three Samples

	SBTS	CPDP	NFTS	F/χ²
Child Age (months)	42.24 (3.14)_a	43.20 (3.60)_a	56.38 (12.02)_b	365.46^***
Child Sex, Male^‡	302 (54.0)	53 (53.0)	108 (51.9)	.28
Child Race, Caucasian^‡	487 (87.1)_a	89 (94.7)_b	158 (77.4)_c	18.37^***
PPVT	102.82 (14.00)_a	103.47 (13.87)_a	106.62 (15.07)_b	6.73^**
Maternal Age (years)	35.99 (4.44)_a	33.81 (4.10)_b	36.96 (4.89)_c	16.41^***
Paternal Age (years)	38.27 (5.39)_a	36.73 (5.53)_b	38.72 (6.62)_a	4.19^*
Maternal Employment^‡	286 (51.2)_a	60 (56.6)_a,b	132 (64.0)_b	9.02^*
Parent Marital Status^‡	524 (93.7)	97 (97.0)	191 (92.7)	1.34
Maternal CBQ Completion^‡	514 (91.9)_a	99 (99.0)_b	162 (77.6)_c	42.63^***
Paternal CBQ Completion^‡	399 (71.4)	82 (82.0)	156 (75.7)	5.24

p < .05;

^**

p < .01;

^***

p < .001.

Note: Table entries are M (SD).

Variables labeled as ^‡ display n (%).

SBTS = Stony Brook Temperament Study; CPDP = Child Personality Development Project; NFTS = Northwestern Family Temperament Study; PPVT = Peabody Picture Vocabulary Test; CBQ = Child Behavior Questionnaire.

Different subscripts reflect significant differences at p < .05.