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Table 1 Univariate analysis of demographic characteristics by body mass index category.

From: Lower short- and long-term mortality associated with overweight and obesity in a large cohort study of adult intensive care unit patients

 

Total

Underweight

(BMI < 18.5 kg/m2)

Normal

(BMI 18.5 to < 25 kg/m2)

Overweight

(BMI 25 to < 30 kg/m2)

Obese

(BMI ≥ 30 kg/m2)

P valuea

n (%)

16,812

786 (4.7)

5,463 (32.5)

5,276 (31.4)

5,287 (31.4)

 

Age (years), n (%)

     

< 0.001

   < 45

2,522 (15.0)

118 (15.0)

905 (16.6)

757 (14.4)b

742 (14.0)b

< 0.001

   45-65

5,593 (33.3)

219 (27.9)

1,467 (26.9)

1,677 (31.8)b

2,230 (42.2)b

< 0.001

   65-80

5,393 (32.1)

215 (27.4)

1,673 (30.6)

1,814 (34.4)b

1,691 (32.0)

0.01

   80+

3,304 (19.7)

234 (29.8)b

1,418 (26.0)

1,028 (19.5)b

624 (11.8)b

< 0.001

Age (years), median (Q1-Q3)

65.9 (52.3, 77.8)

70.6 (53.0, 81.8)

69.4 (51.7, 80.4)

67.2 (53.6, 77.8)

62.3 (51.7, 73.2)

< 0.001

Female, n (%)

7,170 (42.7)

443 (56.4) b

2,469 (45.2)

1,901 (36.0)b

2,357 (44.6)

< 0.001

Race, n (%)

     

< 0.001

   White

11,390 (82.9)

534 (77.3)b

3,667 (81.5)

3,606 (84.3)b

3,583 (83.8)b

< 0.001

   Black

1,179 (8.6)

71 (10.3)b

355 (7.9)

333 (7.8)

420 (9.8)b

0.02

   Hispanic or Latino

430 (3.1)

16 (2.3)

148 (3.3)

144 (3.4)

122 (2.9)

0.58

   Asian

322 (2.3)

47 (6.8)b

173 (3.8)

72 (1.7)a

30 (0.7)b

< 0.001

   Other

424 (3.1)

23 (3.3)

157 (3.5)

121 (2.8)

123 (2.9)

0.09

Marital status, n (%)

     

< 0.001

   Married

8,317 (53.7)

271 (38.6)b

2,524 (50.6)

2,819 (57.8)b

2,703 (55.0)b

< 0.001

   Single/Divorced/Separated

4,690 (30.3)

278 (39.5)b

1,545 (31.0)

1,359 (27.9)b

1,508 (30.7)

0.02

   Widowed

2,479 (16.0)

154 (21.9)b

923 (18.5)

699 (14.3)b

703 (14.3)b

< 0.001

Insurance, n (%)

     

< 0.001

   Medicare/Medicaidc

8,806 (52.4)

501 (63.7)b

3,091 (56.6)

2,658 (50.4)b

2,556 (48.3)b

< 0.001

   Private

6,724 (40.0)

231 (29.4)b

1,877 (34.4)

2,221 (42.1)b

2,395 (45.3)b

< 0.001

   Other

1,282 (7.6)

54 (6.9)b

495 (9.1)

397 (7.5)b

336 (6.4)b

< 0.001

  1. BMI, body mass index. aP value for association or trend across BMI categories; bP < 0.05 compared with normal weight. cMedicare/Medicaid are state or federal programs in the United States that provide insurance for the elderly or patients with low income or significant chronic health conditions.