Table 2. Comparison of tinnitus patients with and without complaints about temporomandibular joint disorder (see separate documents).
| Temporomandibular joint disorder complaints (n = 1204) | Yes (n = 261, 22%) | No (n = 943, 78%) | Statistics | ||
| demographic characteristics | |||||
| age (years) (n = 1181) | 50.7±13.9 | 53.6±13.1 | T = 3.141; df = 1179; p = 0.002* | ||
| age at tinnitus onset (years) (n = 1088) | 41.5±14.5 | 45.2±14.4 | T = 3.570; df = 1086; p<0.001* | ||
| gender (female/male) (n = 1204) | 140/121 | 311/632 | χ2 = 37.245; df = 1; p<0.001* | ||
| tinnitus and audiologic characteristics | |||||
| duration (n = 1089) | 8.9±9.5 | 8.2±9.5 | T = 0.947; df = 1087; p = 0.344 | ||
| onset (gradual/abrupt) (n = 1139) | 114/136 | 442/447 | χ2 = 1.325; df = 1; p = 0.250 | ||
| pulsatile (no/yes with heartbeat/yes other than heartbeat) (n = 1180) | 196/34/27 | 758/90/75 | χ2 = 4.486; df = 2; p = 0.106 | ||
| maskable by music or sounds (no/yes) (n = 1027) | 33/190 | 213/591 | χ2 = 13.107; df = 1; p<0.001* | ||
| somatic modulation (no/yes) (n = 1183) | 134/123 | 648/278 | χ2 = 28.568; df = 1; p<0.001* | ||
| onset related event (sound/whiplash/hearingloss/stress/headtrauma/others/multiple events/no event) (n = 1204) | 17/11/25/61/5/62/44/36 | 54/12/95/219/6/253/154/150 | χ2 = 14.556; df = 7; p = 0.042 | ||
| hyperacousis (never/rarely/some-times/usually/always) (n = 1181) | 27/28/97/46/59 | 113/138/361/147/165 | χ2 = 6.175; df = 4; p = 0.186 | ||
| mean hearing level (dB HL over all frequencies of both ears) (n = 849) | 22.7±15.8 | 23.6±14.1 | T = 0.767; df = 847; p = 0.443 | ||
| questionnaires | |||||
| tinnitus questionnaire (n = 981) | 41.7±18.1 | 40.7±17.8 | T = 0.709; df = 979; p = 0.479 | ||
| tinnitus handicap inventory (n = 1160) | 50.4±22.2 | 47.2±23.3 | T = 1.927; df = 1158; p = 0.054 | ||
| Beck depression inventory (n = 1117) | 12.3±8.8 | 10.6±8.3 | T = 2.722; df = 1115; p = 0.007 | ||
| WHO quality of life questionnaire domain 1 (n = 729) | 13.9±3.2 | 14.5±2.9 | T = 2.359; df = 727; p = 0.019 | ||
| WHO quality of life questionnaire domain 2 (n = 730) | 13.7±2.8 | 14.1±2.7 | T = 1.595; df = 728; p = 0.111 | ||
| WHO quality of life questionnaire domain 3 (n = 728) | 14.2±3.5 | 14.5±3.1 | T = 1.235; df = 726; p = 0.217 | ||
| WHO quality of life questionnaire domain 4 (n = 730) | 15.4±2.7 | 15.9±2.3 | T = 1.986; df = 728; p = 0.047 | ||
| numeric rating scales (scale: 1–10) | |||||
| loudness (n = 1138) | 6.3±2.4 | 6.4±2.2 | T = 0.682; df = 1136; p = 0.495 | ||
| discomfort (n = 1136) | 7.0±2.3 | 7.0±2.4 | T = 0.076; df = 1134; p = 0.939 | ||
| annoyance (n = 1139) | 6.6±2.5 | 6.7±2.4 | T = 0.806; df = 1137; p = 0.420 | ||
| ignorability (n = 1137) | 6.6±2.8 | 6.8±2.7 | T = 1.289; df = 1135; p = 0.198 | ||
| unpleasantness (n = 1140) | 6.5±2.6 | 6.7±2.4 | T = 1.110; df = 1138; p = 0.267 | ||
*
p<0.0022 (Bonferroni corrected significance threshold: 5% divided by 23 single contrasts).