Salivary Distinctiveness and Modifications in Males with Diabetes and Behçet’s Disease

Table 3

Observatory clinical signs and symptoms associated with Behçet’s disease.

			Frequency (%)
	Residual	Probability
Disease activity (patient)	−2.11	0.05
Oral ulcers	0.92	0.63	86.2
Uveitis	0.70	0.51	72.8
Hypertonia	0.39	0.24	33.8
Spastic gait	0.27	0.22	28.4
Blurry vision	−0.11	0.18	25.5
Incontinence	−0.17	0.12	16.7
Punctate lesions through CNS	−0.23	0.11	13.8
Papillitis	−0.26	0.10	11.6
Asymmetrical lower extremity hypertonia	−0.34	0.09	9.2
Vitritis	−0.39	0.08	4.9
Person separation index	0.64
Item-trait interaction	0.22

: Chi-squared statistic.
Residual: standardized difference between the observed score and the expected score according to the model.
Person separation index: the estimate of the replicability of person placement that can be expected if the samples of persons are given another set of items measuring the same construct. Analogous to Cronbach’s , it is bounded by 0-1 range (i.e., >0.8 is very good).
Item-trait interaction identifies the degree of the overall fit of the measure to the model. It assesses the degree to which the measure is diverging from the model in a systematic way that is not accounted for by chance alone.