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Table 5 Unadjusted and adjusted odds of extreme obesity (BMI of 40 or higher), an underlying operative diagnosis of RA/inflammatory arthritis, Deyo-Charlson index of 3 or higher, depression or anxiety over time

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
BMI ≥40
 Unadjusted Ref 1.46 (0.91, 2.35) 2.43 (1.58, 3.73)* 2.90 (1.92, 4.37)*
 Age- and sex-adjusted Ref 1.41 (0.85, 2.26) 2.36 (1.53, 3.63)* 2.84 (1.88, 4.29)*
 Comorbidity-adjusted Ref 1.47 (0.92, 2.37) 2.40 (1.56, 3.69* 2.87 (1.90, 4.33)*
 Age-, sex- and comorbidity adjusted Ref 1.42 (0.88, 2.28) 2.30 (1.50, 3.55)* 2.79 (1.85, 4.22)*
Diagnosis of RA/inflammatory arthritis a
 Unadjusted Ref 1.00 (0.67, 1.50) 0.59 (0.38, 0.91) 0.31 (0.19, 0.51)*
 Age- and sex-adjusted Ref 0.97 (0.65, 1.46) 0.55 (0.35, 0.85) 0.29 (0.18, 0.48)*
 Comorbidity-adjusted Ref 1.00 (0.67, 1.51) 0.58 (0.38, 0.90) 0.31 (0.19, 0.50)*
 Age-, sex- and comorbidity adjusted Ref 0.99 (0.66, 1.48) 0.53 (0.34, 0.83) 0.28 (0.17, 0.46)*
Deyo-Charlson Index ≥3 b
 Unadjusted Ref 0.82 (0.64, 1.04) 1.21 (0.97, 1.51) 1.28 (1.04, 1.58)
 Age- and sex-adjusted Ref 0.86 (0.67, 1.10) 1.26 (1.01, 1.58) 1.32 (1.07, 1.63)
Depression
 Unadjusted Ref 1.07 (0.74, 1.53) 1.64 (1.18, 2.27) 2.30 (1.70, 3.11)*
 Age- and sex-adjusted Ref 1.09 (0.76, 1.56) 1.65 (1.19, 2.29) 2.31 (1.71, 3.13)*
 Comorbidity-adjusted Ref 1.09 (0.76, 1.56) 1.59 (1.15, 2.21) 2.24 (1.66, 3.04)*
 Age-, sex- and comorbidity adjusted Ref 1.11 (0.77, 1.59) 1.60 (1.15, 2.22) 2.25 (1.66, 3.05)*
Anxiety
 Unadjusted Ref 1.04 (0.69, 1.59) 1.48 (1.01, 2.17) 1.74 (1.22, 2.49)
 Age- and sex-adjusted Ref 1.09 (0.72, 1.66) 1.51 (1.03, 2.21) 1.75 (1.22, 2.51)
 Comorbidity-adjusted Ref 1.07 (0.70, 1.62) 1.44 (0.98, 2.11) 1.70 (1.18, 2.43)
 Age-, sex- and comorbidity adjusted Ref 1.10 (0.73, 1.68) 1.47 (1.00, 2.15) 1.71 (1.19, 2.15)
  1. Ref, reference category, has an odds ratio of 1.0.
  2. aOsteoarthritis is the reference category for diagnosis.
  3. bSince the variable under study was Deyo-Charlson index, comorbidity-adjusted models were not run.
  4. P < 0.05; P ≤ 0.01; *P ≤ 0.001.
  5. Significant odds ratios are in bold.