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. Author manuscript; available in PMC: 2011 Feb 17.
Published in final edited form as: Value Health. 2009 Apr 23;12(6):1011–1017. doi: 10.1111/j.1524-4733.2009.00542.x

Table 2.

Association between WPAI-CG and measures of caregiving intensity and health-related quality of life measures

Work productivity loss (n = 123) Regular activity productivity loss (n = 308)
Caregiver strain (CSI score) r = 0.45 (P < 0.001) r = 0.55 (P < 0.001)
Depression (CESD score) r = 0.30 (P < 0.001) r = 0.31 (P < 0.001)
Number of hours spent caregiving in typical week r = 0.32 (P < 0.001) r = 0.39 (P < 0.001)
Number of ADL tasks z = 2.18 (P = 0.029) z = 5.61 (P < 0.001)
HCC quartile z = 2.21 (P = 0.027) z = 2.39 (P = 0.017)

r = Spearman rank correlation rho (P-value).

z = Cuzick’s nonparametric test for trend (P-value).

ADL, activities of daily living; CESD, Center for Epidemiological Studies Depression Index; CSI, Caregiver Strain Index; HCC, hierarchical condition category.