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Table 2 Characteristics of eligible patients categorised by quadrisected body mass index categories

From: Impact of body mass index on in-hospital mortality in older patients hospitalized for bacterial pneumonia with non-dialysis-dependent chronic kidney disease

Variable

Category

Quadrisected groups based on quartiles of body mass index

P value

Low,

 ≤ 18.5 kg/m2

Medium–low,

18.6–21.0 kg/m2

Medium–high,

21.1–23.7 kg/m2

High,

 ≥ 23.8 kg/m2

N = 987

N = 989

N = 986

N = 990

Age (years)

 

85.0 (8.4)

84.3 (8.6)

82.3 (8.6)

81.0 (8.5)

 < 0.001

Male

 

482 (48.8%)

470 (47.5%)

371 (37.6%)

409 (41.3%)

 < 0.001

Smoking history

Non-smoker

639 (64.7%)

635 (64.2%)

580 (58.8%)

586 (59.2%)

0.006

 

Current/past smoker

348 (35.3%)

354 (35.8%)

406 (41.2%)

404 (40.8%)

 

Estimated glomerular filtration rate (ml/min/1.73 m2)

40.6 (13.7)

40.2 (14.0)

41.1 (13.4)

40.3 (13.4)

0.49

CKD staging

CKD stage G3

766 (77.6%)

739 (74.7%)

780 (79.1%)

769 (77.7%)

0.39

CKD stage G4

162 (16.4%)

191 (19.3%)

155 (15.7%)

166 (16.8%)

 

CKD stage G5

59 (6.0%)

59 (6.0%)

51 (5.2%)

55 (5.6%)

 

Creatinine clearance (ml/min)

24.3 (9.6)

29.0 (12.0)

33.7 (13.0)

40.4 (16.6)

 < 0.001

Dehydration

677 (68.6%)

624 (63.1%)

578 (58.6%)

535 (54.0%)

 < 0.001

Respiratory failure

None

513 (52.0%)

525 (53.1%)

562 (57.0%)

529 (53.4%)

0.018

Moderate

313 (31.7%)

336 (34.0%)

317 (32.2%)

335 (33.8%)

 

Severe

161 (16.3%)

128 (12.9%)

107 (10.9%)

126 (12.7%)

 

Orientation disturbance

212 (21.5%)

184 (18.6%)

126 (12.8%)

126 (12.7%)

 < 0.001

Immunosuppression

154 (15.6%)

171 (17.3%)

171 (17.3%)

168 (17.0%)

0.70

Pulmonary consolidation

245 (24.8%)

266 (26.9%)

268 (27.2%)

254 (25.7%)

0.60

Hypotension on admission

111 (11.2%)

79 (8.0%)

51 (5.2%)

47 (4.7%)

 < 0.001

Pneumonia type

Community-acquired

900 (91.2%)

924 (93.4%)

947 (96.0%)

953 (96.3%)

 < 0.001

Nursing and healthcare-associated

87 (8.8%)

65 (6.6%)

39 (4.0%)

37 (3.7%)

 

Charlson comorbidity index

1.7 (1.7)

1.7 (1.6)

1.7 (1.7)

1.6 (1.6)

0.57

  1. Data are presented as mean (standard deviation) for continuous measures and as n (%) for categorical measures
  2. CKD Chronic kidney disease
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BMC Geriatrics

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