Table 3 Knowledge scores of respondents, China, 2019

Gender

  Male

6.51 (1.53)

6.37 (1.74)

  Female

6.31 (1.44)

6.73 (1.67)

Age

  < 18

5.90 (1.84)

7.20 (1.92)

  18–30

6.45 (1.50)

6.65 (1.61)

  31–40

6.39 (1.54)

6.62 (1.92)

  41–50

6.50 (1.13)

6.54 (1.73)

  51–60

6.33 (1.28)

5.84 (1.62)

  61–70

6.48 (1.63)

5.27 (1.75)

  > 70

6.80 (1.79)

6.86 (1.77)

Ethnicity

  Han

6.41 (1.50)

6.54 (1.72)

  Other

7.00 (0.94)

7.33 (0.58)

Education level

  None/primary

7.38 (1.92)

5.00 (1.82)

  Junior school

5.83 (1.68)

6.23 (1.76)

  High school

6.42 (1.45)

6.44 (1.76)

  Junior college

6.28 (1.44)

6.66 (1.62)

  Undergraduate college

6.54 (1.46)

6.65 (1.69)

  Master degree/above

6.56 (1.42)

6.63 (1.76)

Annual income level

  Under ¥30,000

6.39 (1.60)

6.54 (1.66)

  ¥30,000-¥60,000

6.19 (1.41)

6.44 (1.78)

  ¥60,000-¥90,000

6.66 (1.50)

6.75 (1.59)

  ¥90,000-¥120,000

6.57 (1.24)

6.83 (1.50)

  ¥120,000-¥150,000

6.41 (1.40)

6.37 (2.48)

  Above ¥150,000

6.58 (1.24)

6.00 (1.87)