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Table 2 Subjects’ background and work environment parameters by TRS score group

From: A survey of influence of work environment on temporomandibular disorders-related symptoms in Japan

Subjects’ background and work environment parameters Low-TRS group (score ≤7) High-TRS group (score ≥8) Total P-value
Subjects (%) 1524(77.4) 445 (22.6) 1969 (100) -
Gender (% women) 186 (12.2) 87 (19.6) 273 (13.9) < 0.001 a
Age: mean (SD) 41.3 (9.8) 39.7 (8.7) 41.0 (9.6) 0.001 b
PC use (h): mean (SD) 5.16 (2.84) 5.51 (2.89) 5.24 (2.85) 0.022 b
Driving (h): mean (SD) 0.57 (0.70) 0.57 (0.83) 0.57 (0.73) 0.932 b
Precise work (h): mean (SD) 0.97 (1.65) 1.08 (1.62) 1.00 (1.65) 0.210 b
Commuting (h): mean (SD) 1.32 (0.95) 1.25 (0.94) 1.31 (0.95) 0.129 b
Before sleep (h): mean (SD) 3.49 (1.30) 3.59 (1.32) 3.51 (1.31) 0.150 b
Sleep (h): mean(SD) 5.95 (1.05) 5.91 (1.00) 5.94 (1.03) 0.471 b
Meetings (h): mean (SD) 0.88 (0.99) 0.78 (0.92) 0.86 (0.98) 0.046 b
Physical labor (h): mean (SD) 0.20 (0.65) 0.19 (0.51) 0.20 (0.62) 0.715 b
  1. TRS, temporomandibular disorder-related symptoms; PC, personal computer; SD, standard deviation; a, Chi-square test; b, t-test.