Table 1.
Demographic characteristics of chronic TMD patients compared to healthy controls
| Chronic TMD patients (n = 503) | Healthy control (n = 180) | p-value | |
|---|---|---|---|
| Parameter | n (%) or Mean ± SD | n (%) or Mean ± SD | |
| Age (years)a | 33.10 ± 13.26 | 32.77 ± 12.95 | 0.771 |
| Age groups |
< 0.001*** 10s < 20s < 30s < over 40 |
||
| Under 20 years old (10s) b | 61 (17.59 ± 2.28) | 20 (17.60 ± 1.56) | |
| 20–30 years old (20s) | 208 (24.58 ± 2.86) | 77 (24.43 ± 2.61) | |
| 31–40 years old (30s) | 93 (34.46 ± 3.09) | 35 (34.03 ± 3.00) | |
| More than 40 years old (over 40) | 141 (51.49 ± 7.41) | 48 (51.55 ± 6.87) | |
| Sex (Female %)c | 333 (66.2) | 116 (64.4) | 0.367 |
| BMI (kg/m2)a | 22.32 ± 3.57 | 21.45 ± 2.76 | 0.001** |
| VAS | 4.89 ± 2.45 | – | n.a. |
| Symptom duration (days) | 589.74 ± 1315.01 | – | n.a. |
TMD temporomandibular disorder, BMI body mass index, SD standard deviation, n.a. not available
A p-value < 0.05 was considered significant.**: p-value <0.01. ***: p-value <0.001
a: The results were obtained via t- test, b : The mean difference among age subgroups was obtained by one-way analysis of variance and post-hoc analysis. c: The results were obtained from χ2 test