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Table 4 Time-trends in patient characteristics (in %) by patient age category from 1993 to 2005 in patients undergoing primary THA

From: Increasing obesity and comorbidity in patients undergoing primary total hip arthroplasty in the U.S.: A 13-year study of time trends

  1993-1995 1996-1998 1999-2001 2002-2005 P-value
BMI ≥40
 Age, <50 1.1 7.3 7.2 5.8 0.30
 Age, 50- < 65 3.5 5.3 7.1 9.3 0.007
 Age, 65- <80 2.4 1.3 4.6 5.7 <0.001
 Age ≥80 0 0 1.3 2.2 0.17
Diagnosis of RA/inflammatory arthritis
 Age, <50 17.9 10.5 6.2 4.2 <0.001
 Age, 50- < 65 2.6 3.3 1.9 1.0 0.11
 Age, 65- <80 3.5 4.2 2.3 1.2 0.002
 Age ≥80 0 0 1.4 0 0.11
Deyo-Charlson Index ≥3
 Age, <50 5.7 1.7 4.8 4.8 0.16
 Age, 50- < 65 4.1 6.7 7.8 8.2 0.13
 Age, 65- <80 16.1 12.7 19.8 19.9 <0.001
 Age ≥80 20.8 24.1 21.9 27.2 0.51
Depression
 Age, <50 2.9 3.0 6.0 8.3 0.02
 Age, 50- < 65 5.4 4.8 8.7 9.4 0.02
 Age, 65- <80 4.7 5.2 6.8 9.1 0.002
 Age ≥80 4.0 6.3 7.1 15.8 0.001
Anxiety
 Age, <50 1.7 0.9 2.4 2.9 0.41
 Age, 50- < 65 2.2 2.2 4.9 3.9 0.12
 Age, 65- <80 4.1 5.1 4.8 6.6 0.14
 Age ≥80 3.4 3.5 4.9 5.7 0.06
  1. Significant p-values are in bold, calculated with chi-squared test.