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Table 1 Baseline characteristics and mortality of the study cohort

From: A mortality prediction rule for non-elderly patients with community-acquired pneumonia

Characteristic

No. of cases (%)

No. (%) of cases alive at 30 days

No. (%) of cases that died within 30 days

(n = 49,370)

(n = 48,638)

(n = 732)

Sex

 Male

28,070 (56.9)

27,550 (56.6)

520 (71.0)

 Female

21,300 (43.1)

21,088 (43.4)

212 (29.0)

Age, years

 18–39

14,791 (30.0)

14,753 (30.3)

38 (5.2)

 40–49

7,167 (14.5)

7,106 (14.6)

61 (8.3)

 50–64

27,412 (55.5)

26,779 (55.1)

633 (86.5)

Body mass index (kg/m2)

  ≤ 15

2,485 (5.0)

2,360 (4.9)

125 (17.1)

 16–29

44,419 (90.0)

43,834 (90.1)

585 (79.9)

  ≥ 30

2,466 (5.0)

2,444 (5.0)

22 (3.0)

Smoking status

 Never smoked

27,883 (56.5)

27,506 (56.6)

377 (51.5)

 Current/ex-smoker

21,487 (43.5)

21,132 (43.4)

355 (48.5)

Charlson comorbidity index

 0–1

37,642 (76.2)

37,269 (76.6)

373 (51.0)

 2–4

10,534 (21.3)

10,270 (21.1)

264 (36.1)

  ≥ 5

1,194 (2.4)

1,099 (2.3)

95 (13.0)

 Myocardial infarction

330 (0.7)

324 (0.7)

6 (0.8)

 Congestive heart failure

2,667 (5.4)

2,572 (5.3)

95 (13.0)

 Peripheral vascular disease

264 (0.5)

259 (0.5)

5 (0.7)

 Cerebrovascular diseases

1,497 (3.0)

1,458 (3.0)

39 (5.3)

 Dementia

201 (0.4)

192 (0.4)

9 (1.2)

 Chronic pulmonary disease

8,503 (17.2)

8,426 (17.3)

77 (10.5)

 Rheumatic disease

1,854 (3.8)

1,818 (3.7)

36 (4.9)

 Peptic ulcer disease

1,910 (3.9)

1,886 (3.9)

24 (3.3)

 Mild liver disease

2,464 (5.0)

2,435 (5.0)

29 (4.0)

 Diabetes without chronic complications

4,741 (9.6)

4,647 (9.6)

94 (12.8)

 Diabetes with chronic complications

1,587 (3.2)

1,547 (3.2)

40 (5.5)

 Hemiplegia or paraplegia

154 (0.3)

153 (0.3)

1 (0.1)

 Renal disease

1,490 (3.0)

1,444 (3.0)

46 (6.3)

 Any malignancy

4,364 (8.8)

4,218 (8.7)

146 (19.9)

 Moderate or severe liver disease

61 (0.1)

56 (0.1)

5 (0.7)

 Metastatic solid tumour

860 (1.7)

777 (1.6)

83 (11.3)

 AIDS/HIV

81 (0.2)

80 (0.2)

1 (0.1)

Barthel index (score)

 81–100

37,035 (75.0)

36,848 (75.8)

187 (25.5)

 41–80

4,733 (9.6)

4,644 (9.5)

89 (12.2)

 0–40

7,602 (15.4)

7,146 (14.7)

456 (62.3)

Requires help with

 Feeding

8,928 (18.1)

8,448 (17.4)

480 (65.6)

 Moving from the wheelchair to the bed

12,367 (25.0)

11,832 (24.3)

535 (73.1)

 Personal grooming

9,842 (19.9)

9,345 (19.2)

497 (67.9)

 Getting on/off toilet

10,869 (22.0)

10,345 (21.3)

524 (71.6)

 Bathing

12,610 (25.5)

12,065 (24.8)

545 (74.5)

 Walking on a level surface

12,581 (25.5)

12,035 (24.7)

546 (74.6)

 Ascending and descending stairs

13,433 (27.2)

12,872 (26.5)

561 (76.6)

 Dressing

12,572 (25.5)

12,032 (24.7)

540 (73.8)

 Controlling the bowels

8,313 (16.8)

7,844 (16.1)

469 (64.1)

 Controlling the bladder

8,377 (17.0)

7,906 (16.3)

471 (64.3)

  1. Definition of abbreviations: AIDS acquired immune deficiency syndrome, HIV human immunodeficiency virus