Table 1.

Parameter estimates in the binary part of the model for the HAQ data

Parameters	Misspecified model		Full model		Latent process model
	Estimate (SE)	p	Estimate (SE)	p	Estimate (SE)	p
Intercept	– 1.0199 (0.4079)	0.0129	– 1.0015(0.3746)	0.0078	– 0.9909(0.3556)	0.0056
Age at onset of PsA	0.6031 (0.1743)	0.0006	0.6266(0.1611)	0.0001	0.6392(0.1538)	< 0.0001
Sex
Male
Female	1.9944(0.3603)	< 0.0001	2.0080 (0.3276)	< 0.0001	2.0037(0.3149)	< 0.0001
PsA disease duration	– 0.0027 (0.0259)	0.9169	0.0156(0.0232)	0.5027	0.0166(0.0220)	0.4501
Actively inflamed joints	0.1758 (0.0513)	0.0007	0.1566(0.0495)	0.0017	0.1380(0.0465)	0.0032
Clinically deformed joints	– 0.0161 (0.0321)	0.6165	0.0120(0.0260)	0.6441	0.0179(0.0238)	0.4531
PASI score	0.1941 (0.1257)	0.1233	0.1754(0.1086)	0.1071	0.1543(0.1017)	0.1299
Morning stiffness
No
Yes	1.5953 (0.2319)	< 0.0001	1.5777(0.2112)	< 0.0001	1.5691(0.2018)	< 0.0001
ESR	0.3030 (0.1310)	0.0213	0.2988(0.1164)	0.0106	0.2971(0.1103)	0.0074
Medications
None
NSAIDs	0.2998 (0.2743)	0.2751	0.2955(0.2529)	0.2435	0.2960(0.2439)	0.2257
DMARDs	0.3074 (0.2508)	0.2211	0.3100(0.2295)	0.1776	0.3138(0.2197)	0.1541
Steroids	0.9945 (0.4698)	0.0350	0.9946(0.4458)	0.0263	0.9927(0.4355)	0.0232
Interaction of actively inflamed	0.0002 (0.0034)	0.9502	– 0.0003(0.0033)	0.9403	0.0003(0.0031)	0.9300
joints with arthritis duration
Interaction of clinical deformed	0.0032 (0.0016)	0.0442	0.0022(0.0013)	0.0844	0.0018(0.0011)	0.1102
joints with arthritis duration
σu2	4.2519 (0.8549)	< 0.0001	4.3930(0.8924)	< 0.0001	4.2641(0.9001)	< 0.0001
ρ	(ρ = 0)		0.9423(0.0373)	< 0.0001	(ρ = 1)

SE, standard error.