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Table 1 Demographic, clinical and psychological characteristics based on pain type in subjects with amplified pain (N = 636)

From: The spectrum of pediatric amplified musculoskeletal pain syndrome

Variables

All

(N = 636)

Limited pain*

(N = 290)

Diffuse pain*

(N = 346)

P-value

Demographics, N (%)

 Sex, female

509 (80%)

218 (75%)

291 (84%)

< 0.01

Race

 Caucasian

502 (79%)

232 (80%)

270 (78%)

0.55

 Black

53 (8%)

21 (7%)

32 (9%)

0.36

 Other

78 (12%)

35 (12%)

43 (12%)

0.89

 Ethnicity, non-Hispanic

581 (91%)

260 (90%)

321 (93%)

0.37

 Age, median (IQR|)

14 (12–16)

14 (12–15)

15 (13–16)

< 0.001

 BMI, median (IQR)

22 (19–26)

21 (19–26)

19 (17–22)

0.56

 Meet 2010 ACR Fibromyalgia Criteria

222 (35%)

23 (8%)

199 (58%)

< 0.0001

Patient Reported Outcome Measures, Median (IQR)

 Current pain (0–10)

5 (3–7)

5 (2–7)

6 (4–7)

<.0001

 Most pain (0–10)

9 (8–10)

9 (8–10)

10 (8–10)

< 0.01

 Least pain (0–10)

3 (1–5)

3 (0–4)

4 (2–6)

<.0001

 Patient FDI (0–60)

22 (13–31)

19 (10–28)

25 (17–33)

<.0001

 Parent FDI (0–60)

22 (12–31)

18 (10–27)

25 (15–32)

<.0001

 WPI Score (scored 0–19)

6 (2–10)

2 (1–3)

10 (7–14)

<.0001

 SSS (scored 0–12)

6 (3–8)

4 (2–6)

7 (5–9)

<.0001

 Duration of symptoms (months)

18 (8–36)

12 (7–36)

24 (9–48)

< 0.01

 History of trigger event^

181 (28%)

98 (34%)

83 (24%)

< 0.01

 Attend Traditional School, yes [N, (%)]

344 (54%)

172 (59%)

172 (50%)

0.02

 Transient autonomic changes§, yes [N, (%)]

87 (14%)

40 (14%)

47 (14%)

0.94

Self-reported Cognitive and/or Psychological Issues, N (%)

 Anxiety / Panic attacks

288 (45%)

108 (37%)

180 (52%)

< 0.001

 Depression

173 (27%)

52 (18%)

121 (35%)

<.0001

 Obsessive Compulsive Disorder

55 (9%)

18 (6%)

37 (11%)

0.04

 Previous outpatient mental health care

421 (66%)

177 (61%)

244 (71%)

0.01

Previous psychiatric hospitalization

33 (5%)

7 (2%)

26 (8%)

< 0.01

 Suicide attempt

21 (3%)

6 (2%)

15 (4%)

0.12

Suicide ideation

117 (18%)

36 (12%)

81 (23%)

< 0.001

Adverse Childhood Experiences, N (%)

 Household member Attempted/Committed Suicide

6 (1%)

1 (< 1%)

5 (2%)

0.23

 Household member went to Prison

5 (1%)

2 (1%)

3 (1%)

1.00

 Parents are Divorced/Separated

123 (19%)

45 (16%)

78 (23%)

0.03

 Parents or other household member with Alcohol/Drug problem

12 (2%)

3 (1%)

9 (3%)

0.24

 Verbal/Physical/Sexual Abuse

7 (1%)

2 (1%)

5 (2%)

0.46

 Other adverse childhood experiences

82 (13%)

39 (14%)

43 (12%)

0.70

Number of Adverse Childhood Experiences, N (%)

 0

445 (70%)

211 (73%)

234 (68%)

0.24

 1

151 (24%)

67 (23%)

84 (24%)

 2

31 (5%)

10 (4%)

21 (6%)

 3

6 (1%)

2 (1%)

4 (1%)

 4

3 (< 1%)

0

3 (1%)

Type of Pain, N (%)

 Constant

487 (77%)

216 (74%)

271 (78%)

0.04

 Intermittent

117 (18%)

61 (21%)

56 (16%)

 Constant and intermittent

26 (4%)

8 (3%)

18 (5%)

 No pain

6 (1%)

5 (2%)

1 (< 1%)

  1. Missing data: race (3), ethnicity (7), BMI (7), 2010 ACR fibromyalgia criteria (57), current pain (1), most pain (3), least pain (2), FDI patient (9), FDI parent (10), WPI (57), SSS (57), pain duration (1)
  2. Abbreviations: N number of subjects, IQR Interquartile Range, BMI body mass index, ACR American College of Rheumatology, FDI Functional Disability Index, WPI Widespread Pain Index, SSS Symptom Severity Score
  3. *Subjects with < 5 painful body regions categorized in Limited Pain and, subjects with ≥5 painful body regions categorized in Diffuse Pain
  4. P-value statistically significant if < 0.05
  5. Based on 2010 American College of Rheumatology fibromyalgia criteria, subjects are categorized into two groups – meet the criteria if their WPI ≥ 7 and SSS ≥ 5 or WPI 3–6 and SSS ≥ 9, symptoms present for at least 3 months and absence of a disorder that explains the pain; and not meeting the criteria if not meet any of these conditions
  6. ^History of trigger event includes: major trauma, minor trauma, illness or surgery
  7. §Autonomic changes categories: subjects could report or demonstrate an autonomic change (including temperature change, cyanosis, edema) in > 1 category
  8. Previous outpatient mental health care defined as seen at least once by a counselor/therapist/psychologist for pain
  9. Subjects could report more than one