Table 4 Chi-square test for relationship of OS and VSC level and oral hygiene behaviors
From: Prevalence and relevant factors of halitosis in Chinese subjects: a clinical research
|  | N (%) | OS≥2 (%) | P | VSC ≥ 110 (%) | P |
|---|---|---|---|---|---|
Time of last dental visit | Â | Â | 0.025 | Â | 0.417 |
 less than 1 year | 51(24.9) | 26(51.0) |  | 17(33.3) |  |
 1 year ago | 38(18.5) | 22(57.9) |  | 15(39.5) |  |
 2 years ago | 11(5.4) | 7(63.6) |  | 4(36.4) |  |
 3 years ago | 28(13.7) | 21(75.0) |  | 10(35.7) |  |
 Never | 77(37.6) | 59(76.6) |  | 38(49.4) |  |
 Total | 205 | 135(65.9) |  | 84(41.0) |  |
Toothbrushing frequency | Â | Â | 0.026 | Â | 0.365 |
 3 times | 17(8.3) | 9(52.9) |  | 5(29.4) |  |
 Twice | 147(71.7) | 92(62.6) |  | 59(40.1) |  |
 Once or less | 41(20.0) | 34(82.9) |  | 20(48.8) |  |
 Total | 205 | 135(65.9) |  | 84(41.0) |  |
Utilization of mouthwash | Â | Â | 0.591 | Â | 0.676 |
 Yes | 32(15.6) | 20(62.5) |  | 12(37.5) |  |
 No | 163(79.5) | 107(65.6) |  | 69(42.3) |  |
 Used to | 10(4.9) | 8(80.0) |  | 3(30.0) |  |
 Total | 205 | 135(65.9) |  | 84(41.0) |  |
Tongue cleaning | Â | Â | 0.246 | Â | 0.109 |
 Yes | 54(26.3) | 32(59.3) |  | 17(31.5) |  |
 No | 151(73.7) | 103(68.2) |  | 67(44.4) |  |
 Total | 205 | 135(65.9) |  | 84(41.0) |  |