Refer to the data of Exercise 10.3.2 reported by Son et al. (A-6), who studied family caregiving in Korea of older adults with dementia. The outcome variable, caregiver burden (BURDEN), was measured by the Korean Burden Inventory (KBI) where scores ranged from 28 to 140 with higher scores indicating higher burden. Perform a stepwise regression analysis on the following independent variables reported by the researchers:

CGAGE: caregiver age (years)

CGINCOME: caregiver income (Won-Korean currency)

CGDUR: caregiver-duration of caregiving (month)

ADL: total activities of daily living where low scores indicate the elderly perform activities independently.

MEM: memory and behavioral problems with higher scores indicating more problems.

COG: cognitive impairment with lower scores indicating a greater degree of cognitive impairment.

SOCIALSU: total score of perceived social support (25–175, higher values indicating more support). The reported data are as follows.

CGAGE CGINCOME CGDUR ADL MEM COG SOCIALSU BURDEN 41 200 12 39 4 18 119 28 30 120 36 52 33 9 131 68 41 300 60 89 17 3 141 59 35 350 2 57 31 7 150 91 37 600 48 28 35 19 142 70 42 90 4 34 3 25 148 38 49 300 26 42 16 17 172 46 39 500 16 52 6 26 147 57 49 309 30 88 41 13 98 89 40 250 60 90 24 3 147 48