Table 3 Associations between mental health status/self-perceived health status and background variables (multivariate stepwise logistic regression)^a

  Involved in field work only

1.00

N.S.

1.00

  Involved in non-field work only

1.89 (1.27,2.82)

0.002

N.S.

1.74 (1.28,2.36)

<0.001

  Involved in both work types

1.04 (0.85,1.27)

0.686

N.S.

1.25 (1.09,1.43)

0.001

  Adequate/relatively adequate

1.00

N.S.

1.00

  Average

1.18 (0.99,1.41)

0.064

N.S.

2.02 (1.77,2.30)

<0.001

  Inadequate/very inadequate

2.18 (1.33,3.59)

0.002

N.S.

3.64 (2.23,5.92)

<0.001

 Start time of COVID-19 prevention and control work (on or after 23 January 2020)

0.80 (0.68,0.94)

0.008

0.78 (0.66,0.92)

0.004

0.82 (0.72,0.93)

0.002

  0

1.00

1.00

1.00

  1–3

1.42 (1.16,1.72)

0.001

1.51 (1.23,1.85)

<0.001

1.51 (1.32,1.74)

<0.001

  >3

1.67 (1.37,2.05)

<0.001

1.75 (1.42,2.16)

<0.001

1.67 (1.43,1.96)

<0.001

 Worked throughout Chinese New Year (yes)

N.S.

N.S.

1.40 (1.23,1.59)

<0.001

 To avoid infecting family members, chose not to live at home (yes)

N.S.

N.S.

1.23 (1.04,1.45)

0.014

 Worry about being infected at work (medium/very worried)

1.49 (1.25,1.78)

<0.001

1.89 (1.56,2.28)

<0.001

1.46 (1.30,1.65)

<0.001

 Perceived ability to maintain current intensity of work (≥1 month)

0.48 (0.40,0.58)

<0.001

0.55 (0.45,0.67)

<0.001

0.44 (0.39,0.49)

<0.001

 Perceived support

N.S.

N.S.

0.94 (0.92,0.97)

<0.001

 Perceived troubles at work

1.26 (1.23,1.29)

<0.001

1.28 (1.25,1.31)

<0.001

1.10 (1.08,1.12)

<0.001