Operationalization of diagnostic criteria of DSM-5 somatic symptom disorders

BMC Psychiatry

Table 5 Sociodemographic and clinical characteristics of the different SSD severity types (n = 491)

	Non SSD (n = 276)	Mild (n = 39)	Moderate (n = 59)	Severe (n = 117)	p
Age (M ± SD)	45.1 ± 16.9	42.9 ± 16.7	44.6 ± 16.3	45.3 ± 15.2	.876
Female (%)	63.1	69.2	61.0	71.8	.322
Insurance (yes %)	84.6	89.5	73.7	88.8	.057
Residence (%)					.217
City	82.5	76.9	71.2	77.8
Rural	17.5	23.1	28.8	22.2
Marital status (%)					.574
Single	20.1	12.8	22.4	20.7
Married	61.9	59.0	56.9	64.7
Divorced/ widowed	17.9	28.2	20.7	14.7
Life situation (%)					.620
Alone	11.3	10.3	17.2	13.2
With others	88.7	89.7	82.8	86.8
Monthly family income (%)					.029
Less than 4000rmb	39.4	25.6	44.1	49.1
4000-8000rmb	33.6	56.4	39.0	31.6
More than 8000rmb	27.0	17.9	16.9	16.9
Occupation (%)					.004
Employed/Student	34.8	56.4	51.7	37.4
Unemployed	40.7	17.9	17.2	33.0
Retired	24.4	25.6	31.0	29.6
Education (%)					.195
Elementary	11.2	7.7	10.2	11.2
Middle school	44.6	51.3	49.2	59.5
University or higher	44.2	41.0	40.7	29.3
PHQ-15 total score (M ± SD)	7.2 ± 5.2¹	11.1 ± 3.5²	6.6 ± 2.1¹	14.3 ± 3.4³	<.001
PHQ-9 total score (M ± SD)	7.5 ± 6.3¹	8.7 ± 4.7¹	8.7 ± 6.8¹	13.0 ± 6.4³	<.001
GAD-7 total score (M ± SD)	5.2 ± 5.2¹	4.0 ± 3.8¹	6.5 ± 5.5²	9.5 ± 6.0³	<.001
WI-7 total score (M ± SD)	3.2 ± 2.0¹	3.3 ± 1.8¹	3.8 ± 1.8²	5.2 ± 1.8³	<.001
SF-12 PCS (M ± SD)	45.7 ± 7.7²	46.2 ± 7.9²	43.0 ± 6.7¹	41.3 ± 6.4¹	<.001
SF-12 MCS (M ± SD)	43.2 ± 11.0²	42.6 ± 10.7²	40.2 ± 9.6²	35.5 ± 12.1¹	<.001
Doctor visits in the past 12 months (%)					<.001
0–2	41.0	35.9	22.8	16.5
3–10	36.0	46.2	40.4	34.8
11–20	8.8	2.6	17.5	20.9
> 20	14.2	15.4	19.3	27.8

Note: The Bonferroni method was adopted for multiple comparisons: values with³ were significant higher than values with², and values with² were significant higher than values with¹ in multi-group comparison. Italic values indicate significance of p value (p < 0.05)

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