Table 3. Comparison between patients more optimistic than his surgeon and patients more pessimistic.

Patients characteristics		More optimisticpatients (n = 44)	More pessimisticpatients (n = 44)	p-value(univariate tests)1	p-value(adjusted for surgeon effect)2
Socio-demographic characteristics
Recrutement site	Cochin	12 (31%)	27 (69%)	0.003	-
	Lariboisière	27 (69%)	12 (31%)
	Gabriel Montpied	5 (50%)	5 (50%)
Gender	Male	19 (43%)	25 (57%)	0.3	0.2
	Female	25 (57%)	19 (43%)
Ipsilateral THA	Yes	7 (47%)	8 (53%)	1	0.6
	No	37 (51%)	36 (49%)
Comorbidity Index	Score = 0	24 (59%)	17 (42%)	0.2	0.07
	Score>0	19 (41%)	27 (59%)
Retirement	Yes	33 (53%)	29 (47%)	0.5	0.2
	No	11 (42%)	15 (58%)
Profession	Liberal, senior officer	19 (38%)	31 (62%)	0.02	0.03
	Employee, worker	25 (66%)	13 (34%)
Education	Post secondary	18 (44%)	23 (56%)	0.4	0.4
	Pre secondary	26 (55%)	21 (45%)
Marital status	Married/in couple	22 (45%)	27 (55%)	0.4	0.2
	Single	22 (56%)	17 (44%)
Sport	Recommended	41 (52%)	38 (48%)	0.5	0.1
	Not recommended	3 (33%)	6 (67%)
Health status and survey scores
Age		65.3±2.2	64.4±2.0	0.8	0.4
Body Mass Index (kg/m2)		25.2±0.8	25.9±0.5	0.4	0.9
Trust in surgeon (NS, max = 10)		9.4±0.1	9.1±0.2	0.2	0.1
Communication	Patient participation	8.3±0.5	7.6±0.4	0.3	0.7
	Partnership building	5.7±0.3	5.7±0.3	0.9	0.8
	Information	11.7±0.5	10.8±0.5	0.2	0.8
Pain (NS, max = 10)		7.0±0.3	6.4±0.3	0.2	0.1
WOMAC (max = 32)		20.4±0.8	17.2±0.8	0.006	0.006
SF-12 : PCS (max = 100)		29.4±1.1	34.6±1.3	0.003	0.005
SF-12 : MCS (max = 100)		50.7±1.7	47.8±1.8	0.3	0.4

Bold characters indicate significative tests; NS = Numeric Scale; WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index; SF-12 = Medical Outcome Study Short Form 12; PCS = Physical Component Summary; MCS = Medical Component Summary.

¹ = comparisons using chi-square tests and ANOVAs.

² = comparisons using mixed effect logistic models (random effects = surgeon).