Do pessimists report worse outcomes after total hip arthroplasty?

Table 3 Multivariable-adjusted association^a of Pessimism with outcomes 2-years after Primary THA

	n/N^b (%)	OR (95 % CI)	p-value
Moderate-Severe Pain vs. None-Mild Pain
Pessimist
No	27/339 = 8 %	1.0
Yes	14/114 = 12.3 %	2.16 (0.90, 5.20) ^c	0.08
Improvement in Hip Function to “Better/Same/Worse” vs. “Much Better”
Pessimist
No	41/323 = 12.7 %	1.0
Yes	19/108 = 17.6 %	1.87 (0.77, 4.52) ^d	0.16
Moderate-Severe Activity Limitation vs. None-Mild Activity Limitation
Pessimist
No	110/340 = 32.4 %	1.0
Yes	49/116 = 42.2 %	2.90 (1.25, 6.70) ^e	0.01

Significant odds ratios are in bold; Numbers rounded to the nearest digit for percentages
^a Multivariable logistic regression models adjusted for covariates consistent with 1 variable per 10 events rule. Variables were added in the following order due to clinical relevance: gender and age; depression; medical comorbidity; income; preoperative pain and function
^b Totals may not add up exactly to 488 at 2-years due to missing responses to each of the variable
^c Model adjusted for age, sex, depression score (41 events)
^d Model adjusted for age, sex, depression score and Charlson index, since adding income prevented the model from converging (60 events)
^e Model adjusted for age, sex, depression score, Charlson index, income, preoperative pain and preoperative function (86 events)

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