. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Aust Occup Ther J. 2014 Oct 4;61(6):384–393. doi: 10.1111/1440-1630.12155

Table 4. Relative Precision Estimates of the ASPEn Scale, ASPEn Raw Score, and ASPEn Rasch Measure Using Depressive Symptoms and Volunteer Status as the Grouping Variables.

Scale	Depressive Symptoms group means (SD)		Mean difference	p-value	F-statistic	Relative precision
Scale	CESD<11 (n=244)	CESD ≥12 (n=216)	Mean difference	p-value	F-statistic	Relative precision
ASPEn raw score	76.6 (11.7)	67.8 (14.9)	8.9	<0.001	50.59	1.00
ASPEnRasch measure	69.4 (12.7)	61.1 (12.5)	8.3	<0.001	49.16	0.97
Scale	Volunteer Status group means (SD)		Mean difference	p-value	F-statistic	Relative precision
Scale	Not Volunteer (n=378)	Volunteer (n=81)	Mean difference	p-value	F-statistic	Relative precision
ASPEn raw score	71.5 (14.0)	77.1 (13.4)	-5.6	<0.001	10.88	1.00
ASPEnRasch measure	64.6 (13.1)	69.8 (13.4)	-5.2	<0.001	10.44	0.96

ASPEn=Activity Significance Personal of Evaluation

CESD= Center for Epidemiologic Studies Depression-20 (CESD-20)