TABLE 5.
Interaction between frequency of tooth brush and basic information on the incidence of hypertension and T2DM
| Hypertension | T2DM | |||||||
|---|---|---|---|---|---|---|---|---|
| Characteristic | Cases/n | Incident density/1000 PYs | HR(95%CI) | Pfor interaction | Cases/n | Incident density/1000 PYs | HR(95%CI) | Pfor interaction |
| Location | ||||||||
| Urban | 282/1130 | 37.31 | 1.89 (1.42,2.52)*** | <0.001 | 165/1619 | 14.92 | 1.43 (1.01,2.03)* | 0.175 |
| Rural | 680/2873 | 32.88 | 1.14 (0.95,1.37) | 447/3777 | 15.80 | 1.38 (1.08,1.77)* | ||
| Age | ||||||||
| <60 | 754/3443 | 30.74 | 1.47 (1.25,1.74)*** | 0.486 | 477/4396 | 14.85 | 1.62 (1.30,2.03)*** | 0.013 |
| 60‐ | 208/560 | 56.37 | 1.35 (0.86,2.13) | 135/1000 | 18.78 | 0.90 (0.57,1.43) | ||
| Ethic Group | ||||||||
| Han | 581/2229 | 36.38 | 1.53 (1.25,1.88)*** | <0.001 | 394/3082 | 17.50 | 1.55 (1.21,2.00)** | 0.067 |
| Others | 381/1774 | 31.05 | 1.18 (0.93,1.50) | 218/2314 | 12.93 | 1.19 (0.85,1.67) | ||
| Sex | ||||||||
| Male | 477/1917 | 35.43 | 1.41 (1.12,1.76)** | 0.509 | 303/2641 | 15.66 | 1.43 (1.08,1.91)* | 0.474 |
| Female | 485/2086 | 32.73 | 1.42 (1.14,1.77)** | 309/2755 | 15.45 | 1.42 (1.07,1.89)* | ||
| BMI | ||||||||
| <18.5 | 52/262 | 27.75 | 1.30 (0.65,2.62) | 0.097 | 30/330 | 12.76 | 1.02 (0.41,2.51) | 0.290 |
| 24‐ | 636/2689 | 33.33 | 1.58 (1.27,1.95)*** | 358/3499 | 14.18 | 1.52 (1.14,2.03)** | ||
| 28‐ | 219/865 | 36.49 | 1.36 (1.02,1.80)* | 152/1235 | 16.17 | 1.54 (1.06,2.25)* | ||
| >28 | 54/182 | 42.13 | 0.80 (0.47,1.38) | 70/326 | 30.31 | 1.16 (0.69,1.96) | ||
| Hypertension | ||||||||
| No | / | / | / | / | 438/4015 | 14.92 | 1.73 (1.35,2.22)*** | 0.001 |
| Yes | / | / | / | / | 174/1381 | 17.44 | 0.97 (0.68,1.39) | |
| T2DM | ||||||||
| No | 895/3744 | 33.87 | 1.46 (1.24,1.72)*** | 0.158 | / | / | / | / |
| Yes | 60/239 | 34.94 | 1.03 (0.59,1.80) | / | / | / | / | |
Note: The models were adjusted for age (continuous variable), sex, ethic group, location, education, marriage, occupation, smoking habit, BMI (kg/m2), baseline hypertension, T2DM, and dyslipidemia; outcome factors were not included.
Cases: The number of outcome events in participants who brushed their teeth less than 2 times per day in the corresponding subgroup.
n: The number of participants who brushed their teeth less than 2 times per day in the corresponding subgroup.
Abbreviations: HR, hazard ratio; 95%CI, 95% confidence interval; PYs, person‐years.
* P<0.05, ** P<0.01, *** P<0.001