TABLE 2.

Chi-squared- and t-tests showing the differences between chronic pain patients screening positive and negative for PTSS at a level qualifying for a PTSD diagnosis in the first wave of data collection.

	Total		Screening positive for PTSD		Screening negative for PTSD
	n	%	n	%	n	%	t/χ2
Gender:	101
Male	36	35.6	5	20.0	31	40.8
Female	65	64.4	20	80.0	45	59.2	3.54
Age:	101
18–50	58	57.4	18	72.0	40	52.6
≥51	43	42.6	7	28.0	36	47.4	2.89
Diagnostic group:	101
Primary pain	77	76.2	17	68.0	60	78.9
Secondary pain	24	23.8	8	32.0	16	21.1	1.24
Living situation:	95
Alone	33	34.7	12	52.2	21	29.2
With others	62	65.3	11	47.8	51	70.8	4.07∗
Marital status:	98
Unmarried	61	62.2	16	66.7	45	60.8
Married	37	37.8	8	33.3	29	39.2	0.26
Children:	98
Have children	71	72.4	19	79.2	52	70.3
No children	27	27.6	5	20.8	22	29.7	0.72
Work or life situation:	97
Working/student/military service	39	40.2	7	30.4	32	43.2
Not working	58	59.8	16	69.6	42	56.8	1.20
	M	SD	M	SD	M	SD	t/χ2
Age (21–83) (n = 101)	47.77	15.17	46.16	12.58	48.30	15.97	0.69
NRS pain intensity (0–10) (n = 90)	7.29	1.64	8.05	1.36	7.04	1.66	−2.56∗
NRS pain distress (0–10) (n = 90)	7.88	1.64	8.59	1.22	7.65	1.70	−2.41∗
Pain duration in years (0–99) (n = 92)	9.96	11.15	9.05	10.90	10.24	11.29	0.44
Self–perceived health (1–4) (n = 92)	3.21	0.66	3.41	0.50	3.14	0.69	–1.70
The modified ODI (0–100) (n = 101)	42.50	16.74	51.52	16.45	39.53	15.84	–3.25∗∗
HSCL–25 (1–4) (n = 91)	2.20	0.56	2.55	0.58	2.06	0.51	–3.80∗∗∗
PCS (0–52) (n = 92)	23.79	11.35	31.09	9.88	21.50	10.85	–3.69∗∗∗
GSE (10–40) (n = 92)	28.64	6.63	28.00	8.66	28.84	5.91	0.43
IEQ (0–48) (n = 92)	22.68	9.85	27.95	8.11	21.03	9.82	–3.00∗∗
CFQ (0–11) (n = 92)	6.52	3.51	7.77	2.83	6.13	3.62	–1.95
ISI (0–28) (n = 92)	15.95	6.92	21.32	5.28	14.26	6.52	–4.62∗∗∗

*p < 0.05, **p < 0.01, and ***p < 0.001.