Table 2 Correlation matrix of the study variables

1 Psychological QoL

1

0.68^a

0.69^a

0.62^a

0.20

0.24^b

-0.19

0.21

-0.23^b

0.01

0.05

-0.56^a

2 Physical QoL

0.68^a

1

0.69^a

0.64^a

0.19

0.13

-0.06

0.10

-0.33^a

0.01

0.01

-0.43^a

3 Social rel. QoL

0.69^a

0.69^a

1

0.60^a

0.20

0.16

-0.06

0.16

-0.19

0.14

-0.02

-0.38^a

4 Environmental QoL

0.62^a

0.64^a

0.60^a

1

0.24^b

0.27^b

-0.04

0.31^a

-0.19

0.07

-0.06

-0.44^a

5 Problem-focused coping

0.20

0.19

0.20

0.24^b

1

0.71^a

0.10

0.57^a

-0.10

0.07

-0.09

-0.09

6 Emotion-focused coping

0.24^b

0.13

0.16

0.27^b

0.71^a

1

0.19

0.49^a

0.09

0.20

-0.05

-0.15

7 Dysfunctional coping

-0.19

-0.06

-0.06

-0.04

0.10

0.19

1

0.16

-0.05

0.04

-0.21

0.25^b

8 Socially-supported coping

0.21

0.10

0.16

0.31^a

0.57^a

0.49^a

0.16

1

-0.16

0.08

-0.17

0.07

9 Age (caregiver)

-0.23^b

-0.33^a

-0.19

-0.19

-0.10

0.09

-0.05

-0.16

1

-0.11

-0.06

-0.03

10 Sex (caregiver)

0.01

0.01

0.14

0.07

0.07

0.20

0.04

0.08

-0.11

1

0.15

0.11

11 Functional capacity

0.05

0.01

-0.02

-0.06

-0.09

-0.05

-0.21

-0.17

-0.06

0.15

1

0.03

12 Perceived burden

-0.56^a

-0.43^a

-0.38^a

-0.44^a

-0.09

-0.15

0.25^b

0.07

-0.03

0.11

0.03

1

Possible range

7–35

5–25

3–15

6–30

12–60

20–100

16–80

12–60

0–100

0–88

Mean

18.4

20.9

9.0

26.1

30.9

50.6

28.7

29.4

61.7

39.9

33.3

Standard deviation

3.5

5.3

2.5

4.6

7.6

8.8

6.1

8.6

13.6

32.1

16