Table 3 Categorization of videos about oral carcinoma on YouTube and bilibili.

Number of topics per video, Mean, Median[P25,P75]

0.001^a

Main topic, n(%)

<0.001^b

 Etiology/Prevention

32(21.3%)

82(54.7%)

<0.001^c

 Pathology

3(2.0%)

1(0.6%)

0.615^d

 Symptoms

15(10.0%)

25(16.7%)

0.089^c

 Examinations/Diagnosis

23(15.3%)

5(3.3%)

<0.001^c

 Treatment/Prognosis

57(51.4%)

37(24.7%)

<0.001^c

Style of video shooting, n(%)

<0.001^b

 Solo narration

61(40.7%)

55(36.7%)

0.477^c

 Question & Answer

2(1.3%)

2(1.3%)

1.000^d

 PPT or Class

10(6.7%)

7(4.7%)

0.454^c

 Animation/Action

10(6.7%)

13(8.7%)

0.515^c

 Medical scenarios

14(9.3%)

11(7.3%)

0.513^c

 TV show/Documentary

47(31.3%)

9(6.0%)

<0.001^c

 Others

6(4.0%)

53(35.3%)

<0.001^c