Characteristics

Unadjusted OR (95% CI)

P-value

Adjusted OR (95% CI)

P-value

Age (Ref: ≥32 years old)

1.018 (0.357 - 1.679)

0.003

3.733 (1.741 - 8.004)

0.001

Female gender (Ref: Males)

2.800 (1.001 - 7.832)

0.050

3.200 (0.975 - 10.500)

0.055

Hours wearing N95 mask (Ref: <4 hours)

0.999 (0.498 - 2.004)

0.997

1.150 (0.508 - 2.605)

0.737

Pre-existing headache (Ref: Negative)

3.783 (1.558 - 9.185)

0.003

7.775 (2.381 - 25.396)

0.001