Table 2.

Parameter estimates in the continuous 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	0.3176(0.0567)	< 0.0001	0.2149(0.0556)	0.0001	0.1748(0.0555)	0.0018
Age at onset of PsA	0.1011(0.0242)	< 0.0001	0.1009(0.0245)	< 0.0001	0.0984(0.0250)	0.0001
Sex
Male
Female	0.1811(0.0505)	0.0004	0.2225(0.0512)	< 0.0001	0.2461(0.0523)	< 0.0001
PsA disease duration	0.0039(0.0033)	0.2272	0.0035(0.0032)	0.2726	0.0044(0.0032)	0.1719
Actively inflamed joints	0.0219(0.0028)	< 0.0001	0.0239(0.0027)	< 0.0001	0.0243(0.0027)	< 0.0001
Clinically deformed joints	0.0058(0.0031)	0.0627	0.0052(0.0031)	0.0957	0.0051(0.0031)	0.1034
PASI score	0.0128(0.0140)	0.3636	0.0247(0.0134)	0.0667	0.0257(0.0134)	0.0553
Morning stiffness
No
Yes	0.1502(0.0274)	< 0.0001	0.1573(0.0263)	< 0.0001	0.1620(0.0262)	< 0.0001
ESR	0.0395(0.0132)	0.0028	0.0388(0.0127)	0.0024	0.0374(0.0126)	0.0033
Medications
None
NSAIDs	– 0.0240 (0.0289)	0.4065	– 0.0177(0.0281)	0.5288	– 0.0181(0.0280)	0.5194
DMARDs	0.0224(0.0280)	0.4252	0.0235(0.0272)	0.3889	0.0226(0.0272)	0.4064
Steroids	0.0457(0.0453)	0.3135	0.0493(0.0441)	0.2641	0.0481(0.0441)	0.2761
Interaction of actively inflamed	– 0.0004(0.0002)	0.0290	– 0.0004(0.0002)	0.0072	– 0.0005(0.0002)	0.0042
joints with arthritis duration
Interaction of clinical deformed	0.0002(0.0001)	0.1122	0.0003(0.0001)	0.0330	0.0003(0.0001)	0.0351
joints with arthritis duration
σv2	0.1587(0.0154)	< 0.0001	0.1732(0.0166)	< 0.0001	—	—
σv/σu	—	—	—	—	0.2074 (0.0210)	< 0.0001
σe2	0.0785(0.0040)	< 0.0001	0.0774(0.0039)	< 0.0001	0.0779(0.0039)	< 0.0001
ρ	(ρ = 0)		0.9423(0.0373)	< 0.0001	(ρ = 1)
– 2 log- likelihood (both parts)		2116.0		2018.1		2022.2
AIC		2178.0		2082.1		2084.2

SE, standard error.