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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: J Pain. 2018 Jan 4;19(5):506–514. doi: 10.1016/j.jpain.2017.12.262

Table 2.

Association between Number of PTSD Symptoms and Pain-related Outcome Measures (N=4,402).

Number of PTSD Positive Answers

0
48.0%
(N=2,111)
1
12.7%
(N=557)
2
11.7%
(N=516)
3
10.1%
(N=444)
4
17.6%
(N=774)
ANOVA or Chi-square/Jonckheer e-Terpstra p-values

DEMOGRAPHICS

Sex, % female (n) 62.0 (1,302) 63.3 (349) 67.0 (343)* 67.7 (300)* 70.1 (440)* 0.001

Age, Mean (SD) 50.2 (15.2) 49.9 (14.9) 47.6 (14.2)* 46.5 (13.4)* 43.8 (12.2)* <0.001/<0.001

Payor category - % (n) <0.001
 Private insurance 45.0 (890) 32.3 (164)* 31.5 (149)* 28.1 (115)* 23.5 (166)* <0.001
 Medicaid 25.2 (499) 31.4 (159)* 34.0 (161)* 43.8 (179)* 49.4 (349)* <0.001
 Medicare 24.8 (491) 28.6 (145) 27.9 (132) 21.8 (89) 16.8 (119)* <0.001
 Other (e.g., LNI/Tricare) 5.0 (98) 7.7 (39) 6.6 (31) 6.4% (26) 10.3 (73)* <0.001

PAIN & INTERFERENCE Mean (SD) Mean (SD) Mean (SD) Mean (SD) Mean (SD)

Pain intensity 6.3 (1.9) 6.5 (2.0) 6.7 (1.8)* 7.0 (1.7)* 7.1 (1.7)* <0.001/<0.001

Pain interference with general activity 6.6 (2.4) 7.0 (2.3)* 7.1 (2.1)* 7.5 (2.1)* 7.7 (2.1)* <0.001/<0.001

Pain interference with enjoyment of life 6.6 (2.5) 7.2 (2.4)* 7.2 (2.3)* 7.8 (2.2)* 7.9 (2.1)* <0.001/<0.001

FUNCTION

ODI score 43.0 (16.2) 47.4 (16.3)* 48.8 (15.7)* 51.7 (15.1)* 54.6 (15.1)* 0<.001/0<.001

MOOD, QOL, SATISFACTION

PHQ-9 score 8.7 (5.7) 11.9 (6.0)* 12.7 (5.7)* 14.8 (6.0)* 16.6 (6.5)* 0<.001/0<.001

GAD-7 score 4.5 (4.4) 7.4 (5.0)* 8.6 (5.0)* 10.9 (5.4)* 13.0 (5.8)* <0.001/<0.001

PROMIS global 27.5 (4.8) 26.3 (4.6)* 25.7 (4.2)* 25.3 (4.4)* 24.7 (4.0)* <0.001/0<.001

SUBSTANCE ABUSE/MISUSE

ORT score 2.5 (3.3) 3.7 (4.1)* 4.3 (4.1)* 4.8 (4.6)* 5.5 (4.9)* <0.001/<0.001

AUDIT-C score 1.4 (1.6) 1.2 (1.5)* 1.1 (1.5)* 1.1 (1.4)* 1.0 (1.3)* 0.002/<0.001

Abbreviations: AUDIT = Alcohol Use Disorders Identification Test; GAD = Generalized Anxiety Disorder; LNI = Labor & Industries; ODI = Oswestry Disability Index; ORT = Opioid Risk Tool; PHQ = Patient Health Questionnaire; PROMIS = Patient-Reported Outcomes Measurement Information System; PTSD = Post-traumatic Stress Disorder; QOL = quality of life; SD = standard deviation