Table 7 Results of multiple linear regression models between comorbidities and TMD pain intensity in participants in the j-TMD group (n = 59)

TMD intensity (0–10)

Number of comorbidity

0.24 (−0.44 – 0.92)

0.20 (−0.57 – 0.97)

0.12 (−0.59 – 0.84)

p = 0.49, r² = 0.01

p = 0.60, r² = 0.09

p = 0.73, r² = 0.09

Migraine

0.99 (−0.64 – 2.61)

0.34 (−1.62 – 2.32)

0.34 (−1.67 – 2.29)

p = 0.23, r² = 0.03

p = 0.73, r² = 0.19

p = 0.73, r² = 0.19

Chronic Fatigue Syndrome

0.84 (−2.54 – 4.22)

0.08 (−3.94 – 4.09)

−0.08 (−4.00 – 3.82)

p = 0.62, r² = 0.004

p = 0.97, r² = 0.19

p = 0.97, r² = 0.19

Irritable Bowel Syndrome

1.17 (−0.55 – 2.90)

0.75 (−1.29 – 2.79)

0.59 (−1.31 – 2.50)

p = 0.18, r² = 0.03

p = 0.47, r² = 0.19

p = 0.53, r² = 0.19

Interstitial Cystitis

1.16 (−1.50 – 3.82)

1.65 (1.66 – 4.97)

1.73 (−1.53 – 5.01)

p = 0.39, r² = 0.01

p = 0.32, r² = 0.19

p = 0.29, r² = 0.19

Restless Leg Syndrome

−1.85 (−3.77 – 0.08)

−2.13 (4.42 – 0.14)

−2.26 (−4.46 – −0.07)

p = 0.06, r² = 0.06

p = 0.07, r² = 0.19

p = 0.04, r² = 0.19