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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: J Pediatr Orthop. 2016 Jan;36(1):101–109. doi: 10.1097/BPO.0000000000000391

TABLE 2.

Demographic Characteristics and Incidences

Admissions
Patientsa
Variable VTE Orthopaedic
Admissions
VTE per
10,000
Admissions
Orthopaedic
Patients
VTE per
10,000
Patients
N 74 143,808 5.1 117,676 6.3
Age 13.04 (4.35) 10.82 (4.98) 11.05 (5.00)
Length of Stay 10.20 (14.25) 1.45 (2.93) 1.51 (3.07)
Admissions per Patient 1.60 (1.47) 1.22 (0.66)
Sex
  Male 36 (48.65%) 76,123 (52.93%) 4.7 62,611 (53.21%) 5.7
  Female 38 (51.35%) 67,683 (47.06%) 5.6 55,063 (46.79%) 6.9
  Unknown 0 (0.00%) 2 (0.00%) 0.0 2 (0.00%) 0.0
Ethnicity
  Hispanic or Latino 11 (14.86%) 19,661 (13.67%) 5.6 16,273 (13.83%) 6.8
  Not Hispanic or Latino 31 (41.89%) 61,575 (42.82%) 5.0 48,189 (40.95%) 6.4
  Unknown 32 (43.24%) 62,572 (43.51%) 5.1 53,214 (45.22%) 6.0
Race
  Pacific Islander & Asian 3 (4.05%) 2,482 (1.73%) 12.1 2,045 (1.74%) 14.7
  American Indian 1 (1.35%) 934 (0.65%) 10.7 774 (0.66%) 12.9
  African American 8 (10.81%) 21,751 (15.13%) 3.7 18,011 (15.31%) 4.4
  White 50 (67.57%) 99,176 (68.96%) 5.0 80,585 (68.48%) 6.2
  Other 8 (10.81%) 14,267 (9.92%) 5.6 11,802 (10.03%) 6.8
  Unknown 4 (5.41%) 5,198 (3.61%) 7.7 4,459 (3.79%) 9.0
Admission Type
  Ambulatory Surgery 8 (10.81%) 77,517 (53.90%) 1.0 68,373 (58.10%)b 1.2
  Unknown 1 (1.35%) 413 (0.29%) 24.2 402 (0.34%)b 24.9
  Inpatient 64 (86.49%) 55,159 (38.36%) 11.6 47,342 (40.23%)b 13.5
  Observation Unit 0 (0.00%) 10,661 (7.41%) 0.0 9,853 (8.37%)b 0.0
  Clinic Visit 0 (0.00%) 3 (0.00%) 0.0 3 (0.00%)b 0.0
  All other 1 (1.35%) 55 (0.04%) 181.8 55 (0.05%)b 181.8
Admission Year
  2006 11 (14.86%) 20,797 (14.46%) 5.3 19,580 (16.64%)b 5.6
  2007 12 (16.22%) 25,591 (17.80%) 4.7 23,918 (20.33%)b 5.0
  2008 17 (22.97%) 28,392 (19.74%) 6.0 26,527 (22.54%)b 6.0
  2009 16 (21.62%) 30,446 (21.17%) 5.3 28,358 (24.10%)b 5.6
  2010 17 (22.97%) 31,236 (21.72%) 5.4 29,088 (24.72%)b 5.8
  2011 (Quarter 1) 1 (1.35%) 7,346 (5.11%) 1.4 7,237 (6.15%)b 1.4
a

Some patients had more than one admission.

b

Adds to greater than 100% because some patients had admissions of more than one type, and in more than one year.