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. Author manuscript; available in PMC: 2007 Jan 21.
Published in final edited form as: Neuropsychology. 2006 Nov;20(6):675–684. doi: 10.1037/0894-4105.20.6.675

Table 2.

Demographic Data for the Severe CHI and Control Groups

M
 SD
 n
Demographic variable CHI Con CHI Con CHI Con Cohen’s d
Age (years) 30.61 30.72 9.64 10.98 18 18 0.01
Education (years) 12.83 13.61 1.89 1.82 18 18 0.42
Mother’s education (years) 13.35 13.83 2.29 2.37 17 18 0.19
Father’s education (years) 13.59 13.72 2.79 3.12 17 18 0.05
Barona Index FSIQ estimatea 105.08 107.05 5.48 7.01 18 18 0.31

Note. CHI = closed-head injury; Con = control; FSIQ = Full Scale Intelligence Quotient.

a

Estimated Wechsler Adult Intelligence Scale—Revised FSIQ was based on the Barona Index equation (Barona, Reynolds, & Chastain, 1984), which takes into account the following six demographic variables: age, sex, race, education, occupation, and region.