Table 3.

Multivariable generalized estimating equation analysis to assess the association between demographic and clinical variables with repeated measures of health-related quality of life in a cohort of psoriatic arthritis patients using an exchangeable and independent working correlation structures

	Exchangeable			Independent
	Coefficient (95% CI)	p	Std. error	Coefficient (95% CI)	Std. error	p
Women	− 0.001 (− 0.007 to 0.004)	0.65	0.003	0.002 (− 0.005 to 0.008)	0.003	0.60
Age at psoriatic arthritis diagnosis	− 0.005 (− 0.01 to 0.0002)	0.058	2.47E−04	− 0.004 (− 0.009 to 0.001)	2.44E−04	0.10
Follow-up time	− 0.0002 (− 0.002 to 0.001)	0.73	7.17E−04	0.0001 (− 0.001 to 0.001)	5.49E−04	0.84
Year of visit	− 0.0003 (− 0.001 to 0.0003)	0.39	3.08E−04	− 0.001 (− 0.001 to 0.00003)	3.44E−04	0.063
Dyslipidemia	0.008 (− 0.000003 to 0.015)	0.050	0.004	0.01 (− 0.001 to 0.021)	0.005	0.073
Obesity	− 0.009 (− 0.019 to 0.001)	0.074	0.005	− 0.012 (− 0.025 to 0.002)	0.007	0.091
Hyperuricemia	0.003 (− 0.001 to 0.007)	0.097	0.002	–	–	–
Enthesitis	− 0.006 (− 0.01 to -0.002)	1.00E−03	0.002	–	–	–
Calcium and vitamin D	–	–	–	− 0.009 (− 0.016 to − 0.001)	0.004	0.023
Methotrexate (oral)	0.007 (0.001 to 0.014)	0.020	0.003	0.012 (0.004 to 0.019)	0.004	3.00E−03
Antimalarials	0.003 (0.001 to 0.005)	3.00E−03	0.001	0.008 (− 0.002 to 0.018)	0.005	0.097
Leflunomide	–	–	–	0.007 (0.0003 to 0.013)	0.003	0.040
QIC		103.303				132.004

CI confidence interval