Table 5.

Participant Demographic and Clinical Characteristics

	Controls	Cases without Pain		Cases with Pain
	Community Controls (n = 91)	Community Cases (n = 107)	Clinic Cases (n = 7)	Community Cases (n = 359)	Clinic Cases (n = 141)
Gender
Male	37%	21%	43%	14%	10%
Female	63%	79%	57%	86%	90%
Age (years)
Mean ± SD	36 ± 13	39 ± 13	47 ± 14	36 ± 12	39 ± 15
Range	18–66	18–60	19–63	18–67	18–67
Race
White	86%	91%	100%	94%	93%
Other	14%	9%	0%	6%	7%
Education
No College	16%	16%	0%	14%	19%
≥ 1year of college	84%	84%	100%	86%	81%
Income
Less than $50,000	70%	61%	57%	61%	41%
$50,000–79,999	21%	22%	14%	23%	26%
$80,000 or more	9%	17%	29%	16%	33%
Characteristic Pain Intensity (0–100)
Mean ± SD	N/A	N/A	N/A	51 ± 20	54 ± 20
Range				7–100	10–100
Duration of Pain (months)
Mean ± SD	N/A	N/A	N/A	126 ±103	100 ±107
Range				7–480	9–480
Depression
Missing	1%	0%	0%	0%	1%
Normal	81%	85%	72%	58%	65%
Moderate	14%	13%	14%	28%	23%
Severe	4%	2%	14%	14%	11%
Nonspecific Physical Symptoms
Missing	1%	0%	0%	1%	1%
Normal	91%	90%	57%	45%	54%
Moderate	7%	9%	29%	34%	31%
Severe	1%	1%	14%	20%	14%
Graded Chronic Pain Severity
I (%)	N/A	N/A	N/A	44%	39%
II (%)				45%	44%
III–IV (%)				11%	17%
Number of RDC/TMD diagnoses (% / n)
0 Diagnosis	100% / 91	0% / 0	0% / 0	0% / 0	0% / 0
1 Diagnosis	0% / 0	32% / 34	14% / 1	4% / 13	1% / 2
2 Diagnoses	0% / 0	48% / 51	43% / 3	6% / 23	6% / 8
3 Diagnoses	0% / 0	7% / 8	29% / 2	26% / 94	19% / 27
4 Diagnoses	0% / 0	13% / 14	14% / 1	25% / 90	33% / 46
5 Diagnoses	0% / 0	0% / 0	0% / 0	39% / 139	41% / 58