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. 2015 Apr 16;10(4):e0123842. doi: 10.1371/journal.pone.0123842

Table 1. Percentage distribution and rate of VTE diagnosis among hospitalizations of US adults by demographic characteristics, clinical and insurance status, NIS, 2011.

Demographic characteristics, clinical and insurance status Sample distribution Rate of diagnosis of VTE
n a % b CI c % CI P-Value d
Overall 6,710,066 100 2.4 2.4−2.5
Age (years) <0.001
  18−49 2,305,943 34.3 33.5−35.2 1.5 1.4−1.5
  50−79 3,210,405 47.9 47.3−48.4 2.9 2.8−3.0
  ≥ 80 1,193,718 17.8 17.3−18.4 3.0 2.9−3.0
Sex <0.001
  Male 2,708,723 40.4 39.9−40.9 2.9 2.8−2.9
  Female 4,001,343 59.6 59.1−60.1 2.1 2.1−2.2
Race or ethnicity e <0.001
  White 4,176,630 62.3 59.7−64.7 2.5 2.4−2.6
  Black 929,079 13.9 12.6−15.3 2.7 2.6−2.9
  Hispanic 641,244 9.6 8.2−11.3 1.7 1.5−1.8
  Other f 338,916 5.0 4.4−5.8 1.7 1.6−1.9
  Not stated 624,197 9.2 7.1−11.8 2.5 2.3−2.7
Total days of hospital stay <0.001
  < 7 days 5,453,256 81.2 80.7−81.7 1.7 1.6−1.7
  ≥ 7 days 1,256,810 18.8 18.3−19.3 5.7 5.5−5.8
Primary expected payer <0.001
  Medicare 3,142,530 46.9 45.9−47.8 2.9 2.8−3.0
  Medicaid 1,003,379 15.0 14.1−15.9 1.6 1.5−1.7
  Private including HMO 1,972,074 29.3 28.3−30.4 2.2 2.1−2.2
  Self-pay or other payers 592,083 8.8 8.2−9.4 2.1 2.0−2.1
Operating room procedure <0.001
  No procedure of any kind 2,404,657 36.0 34.9−37.1 2.7 2.6−2.8
  Non-operating room procedure g 2,328,118 34.6 33.8−35.5 2.3 2.2−2.4
  Operating room procedure h 1,977,291 29.4 28.7−30.1 2.2 2.1−2.3

a. Unweighted sample size.

b. Weighted percentage may not add-up exactly to 100.0%.

c. 95% confidence interval.

d. P-value for Pearson Chi-Square test.

e. May not be nationally representative because not all participating states collect race or ethnicity information.

f. Included “other race/ethnicity,” “Native American,” and “Asian or Pacific Islander.”

g. Had at least one minor diagnostic or minor therapeutic procedure (without any major diagnostic or major therapeutic procedure) during hospitalization.

h. Had at least one major diagnostic or major therapeutic procedure during hospitalization.