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Table 1 Characteristics of patients and the results of univariate analysis

From: External validation of a new predictive model for falls among inpatients using the official Japanese ADL scale, Bedriddenness ranks: a double-centered prospective cohort study

Variable, Category

All patients

n = 3,551

With Fall

Without fall

p value†

n = 125

n = 3,426

Age, years

78 (66–87)

86 (80–90)

78 (65–86)

 < 0.001

Gender, Male

1,701 (47.9)

59 (47.2)

1,642 (47.9)

0.873

Emergency admission, Yes

1,374 (38.7)

77 (61.6)

1,297 (37.9)

 < 0.001

Transported by ambulance, Yes

473 (13.3)

15 (12.0)

458 (13.4)

0.658

Referral letter, Presence

1,064 (30.0)

43 (34.4)

1,021 (29.8)

0.324

Department, Internal Medicine

1,999 (56.3)

89 (71.2)

1910 (55.8)

 < 0.001

Department, Neurosurgery

68 (1.9)

7 (5.6)

61 (1.8)

Hypnotic medications, Using

357 (10.1)

28 (22.4)

329 (9.6)

 < 0.001

Hypnotic medications, Missing

7 (0.2)

0 (0)

7 (0.2)

Permanent residual damage from previous stroke, Presence

227 (6.4)

11 (8.8)

216 (6.3)

0.273

History of falls, Presence

352 (10.0)

43 (34.4)

309 (9.1)

 < 0.001

Visual impairment, Presence

1,135 (34.2)

61 (56.0)

1,074 (33.5)

 < 0.001

Eating, Independent

2,713 (76.4)

66 (52.8)

2,647 (77.3)

 < 0.001

Eating, Missing category

45 (1.2)

0 (0)

45 (1.3)

Bedriddenness rank, Normal

1,790 (51.9)

11 (8.8)

1,779 (51.9)

 < 0.001

Bedriddenness rank, J

317 (8.9)

10 (8.0)

307 (9.0)

Bedriddenness rank, A

410 (11.5)

25 (20.0)

385 (11.2)

Bedriddenness rank, B

517 (14.6)

57 (45.6)

460 (13.4)

Bedriddenness rank, C

517 (14.6)

22 (17.6)

495 (14.4)

Cognitive function score, Normal

2,187 (61.6)

20 (16.1)

2,167 (63.3)

 < 0.001

Cognitive function score, I

423 (11.9)

24 (19.4)

399 (11.7)

Cognitive function score, II

341 (9.6)

35 (28.2)

306 (8.9)

Cognitive function score, III

453 (12.8)

35 (28.2)

418 (12.2)

Cognitive function score, IV

119 (3.4)

8 (6.5)

111 (3.2)

Cognitive function score, M

16 (0.5)

2 (1.6)

14 (0.4)

Cognitive function score, missing

9 (0.3)

0 (0)

9 (0.3)

Barthel index

100 (55–100)

50 (25–65)

100 (55–100)

 < 0.001

Katz index

6 (1–6)

1 (0–3)

6 (1–6)

 < 0.001

Surgical operation, Undergone

991 (27.9)

13 (10.4)

978 (28.5)

 < 0.001

Rehabilitation, Undergone

1,310 (36.9)

85 (68.0)

1225 (35.8)

 < 0.001

Length of hospital stay (days)

10 (5–18)

32 (18–56)

9 (5–17)

 < 0.001

  1. Continuous and categorical variables are shown as median (interquartile range) and frequency (percent). Bedriddenness ranks: J, independence/autonomy; A, house-bound; B, chair-bound; C, bed-bound. Cognitive function scores: I, almost independent in daily living with only slight cognitive impairment; II, independent with slight difficulty in daily living or communication under careful overseeing; III, dependent in daily living or communication; IV, dependent in daily living or communication, and requires constant care; M, severe psychological symptoms, troubled behaviors or severe physical disorders requiring specialized medical service
  2. †p values were calculated by Mann–Whitney U-test for continuous variables and chi-squared test for categorical variables
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BMC Geriatrics

ISSN: 1471-2318

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