Table 3 Descriptive analysis of health-related quality of life among informal caregivers of older adults  (N = 1853)

Overall, how would you rate your health during the past 4 weeks?

Very poor

0.2

.87908

Poor

1.3

Fair

3.9

Good

19.1

Very good

47.9

Excellent

27.7

During the past 4 weeks, how much did physical health problems limit your usual physical activities (such as walking or climbing stairs)?

Could not do physical activities

0.3

.82677

Quite a lot

4.4

Somewhat

8.4

Very little

36.8

Not at all

50.1

During the past 4 weeks, how much difficulty did you have in doing your daily work, both at home and away from home because of your physical health?

Could not do daily work

0.3

.85414

Quite a lot

5.0

Somewhat

8.5

A little bit

34.1

Not at all

52.1

How much bodily pain have you had during the past 4 weeks?

Very severe

2.4

1.29593

Severe

4.8

Moderate

8.0

Mild

9.3

Very mild

30.9

None

44.5

During the past 4 weeks, how much energy did you have?

None

1.0

.85287

Little

4.8

Some

10.4

Quite a lot

47.8

Very much

36.0

During the past 4 weeks, how much did your physical health or emotional problems limit your usual social activities with family or friends?

Could not do social activities

0.3

.84065

Quite a lot

4.8

Somewhat

9.8

Very little

39.5

Not at all

45.6

During the past 4 weeks, how much have you been bothered by emotional problems (such as feeling anxious, depressed, or irritable)?

Extremely

0.8

.89687

Quite a lot

4.9

Moderately

12.8

Slightly

36.3

Not at all

45.2

During the past 4 weeks, how much did personal or emotional problems keep you from doing your usual work, school, or other daily activities?

Could not do daily activities

0.3

.82610

Quite a lot

4.3

Somewhat

9.7

Very little

39.0

Not at all

46.8

Reliability test items (Cronbach’s alpha based on standardized items) [items (Cronbach's Alpha)]

[8 (.932)]