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Table 3 Summary of hierarchical multiple regression analysis for variables predicting agitation, non aggressive physical behavior, and verbally agitated behavior

From: Discomfort and agitation in older adults with dementia

Variable

B

SE B

β

Overall agitation

   

   Sex

-4.17

6.01

-0.09

   Severity of dementia

.94

3.09

0.06

   Disability (ADL)

.40

0.50

0.17

   Level of discomfort

2.20

0.52

0.55***

R 2 for Step 1 = 0.06, F(3,45) = 0.98 (p = 0.648)

ΔR 2 for Step 2 = 0.28, F(1,44) = 18.21***

R 2 Total = 0.34, F(4,44) = 5.57***

   

Non aggressive physical behavior

   

   Sex

-3.00

2.46

-0.17

   Severity of dementia

-1.14

1.27

-0.19

   Disability (ADL)

-0.04

0.21

-0.05

   Level of discomfort

0.70

0.21

0.45**

R 2 for Step 1 = 0.09, F(3,45) = 1.55 (p = 0.214)

ΔR 2 for Step 2 = 0.18, F(1,44) = 10.89**

R 2 Total = 0.28, F(4,44) = 4.14**

   

Verbally agitated behavior

   

   Sex

-0.98

2.51

-0.05

   Severity of dementia

0.57

1.29

0.09

   Disability (ADL)

0.38

0.21

0.36

   Level of discomfort

0.99

0.22

0.57**

R 2 for Step 1 = 0.09, F(3,45) = 1.45 (p = 0.241)

ΔR 2 for Step 2 = 0.30, F(1,44) = 21.04***

R 2 Total = 0.38, F(4,44) = 6.83***

   
  1. Note. Sex, severity of dementia and disability were introduced in a first block of the regression (Step 1), followed by the level of discomfort at the next step (Step 2). Statistics shown for each variable are those at Step 2.
  2. **p < 0.01
  3. ***p < 0.001