Comparing five depression measures in depressed Chinese patients using item response theory: an examination of item properties, measurement precision and score comparability

Table 1 Sample Characteristics (N = 207)

	Frequency (f)	Percentage (%)
Gender
Female	165	20.3
Male	42	79.7
Age
19 − 29	20	9.7
30 − 39	37	17.9
40 − 49	63	30.4
50 − 59	74	35.7
60 − 69	13	6.3
Marital status
Married	97	46.9
Widowed	22	10.6
Divorced	45	21.7
Separated	5	2.4
Single	37	17.9
NA	1	0.5
Education
Primary	41	19.8
Secondary	140	67.6
Tertiary	26	12.6
Diagnoses^a
Major Depressive Disorder Only	59	28.5
Major Depressive Disorder with Comorbid Conditions (e.g., Anxiety Disorders)	84	40.6
Dysthymia Only	9	4.3
Dysthymia with Comorbid Conditions	9	4.3
Other Conditions (e.g., Bipolar Disorder, Mood Disorders due to General Medical Conditions)	46	22.3

Note
^aDepression was diagnosed by the Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders-Fourth Edition (SCID) [33]

ISSN: 1477-7525