Table 2: Ratio of subjects with a high risk of TMD between the instrument and control groups.

Total Instrument group Control group P value
N 138 72 66
Age: y (SD) 21.0(2.2) 20.0(1.1) 22.0(2.6) < 0.001*a
Women (%) 87(63.0) 42(58.3) 45(68.2) 0.231b
High risk of TMD (%) 35(25.4) 21(29.2) 14(21.2) 0.283b

TMD, temporomandibular disorders; a, t test; b, chi-squared test; * P < 0.05