n (%)

Mean

SD

Median

Range

Family member characteristics

Age

53.3

12.4

54.0

28 - 79

Number who lived with the patient in the ICU

3.0

1.1

3.0

1 - 7

Sex (female)

34 (63.0)

Education level (high school or higher)

46 (85.2)

Marital status (married)

42 (77.8)

Relationship to patient

Spouse

26 (48.1)

Child

15 (27.8)

Parent

4 (7.4)

Sibling

8 (14.8)

Other

1 (1.9)

Household income

<3 million yen

18 (33.3)

3 million - 10 million yen

30 (55.5)

>10 million yen

4 (7.3)

Unknown

2 (3.7)

History of mental disorder

2 (3.7)

Family has a member with a history of mental illness

1 (1.9)

Experienced loss of a family member

43 (79.6)

Experienced loss of a relative

37 (68.5)

Experienced a stressful event within the past month

14 (25.9)

Encountered a traumatic event in the past

4 (7.4)

Patient characteristics

Age

65.6

13.2

67.5

28 - 86

APACHE II score

17.2

8.7

17.5

1 - 40

Length of ICU stay (hours)

86.8

97.2

42.9

12 - 491

Mechanically ventilated period (hours)

59.1

76.6

37.5

3 - 360

Sex (female)

16 (29.6)

Use of heart stimulant and vasopressors

25 (46.3)

Use of sedation

23 (42.6)

Use of ventilation

29 (53.7)

Use of heart - lung machine

4 (7.0)

Use of blood transfusion

17 (31.5)

Use of hemodialysis

2 (4.0)

Number with complications

25 (46.3)

Number who died during ICU stay

3 (5.6)

Patient was admitted to ICU in the past

12 (22.2)

Planned admission

32 (59.3)