Table 2.

Incidence rate ratios from the negative binomial GEE analyses on the longitudinal association between working in healthcare and the anxiety score during the COVID-19 pandemic, based on 22 measurement rounds (March 2020–November 2021, n = 12,085 participants).

	IRR	95% Confidence interval	value of p
Model 1: crude model	1.15	1.08–1.22	<0.001
Model 2: model 1 + demographic characteristics	0.99	0.93–1.06	0.811
Model 3: model 2 + work characteristics	0.98	0.92–1.04	0.474
Model 4: model 3 + health characteristics	0.97	0.91–1.04	0.383

Non-healthcare workers is the reference group. Demographic characteristics are sex, age, education level and household composition. Work characteristics are employment contract and working hours. Health characteristics are chronic health condition(s), chronic psychological illness, COVID-19 test result and COVID-19 vaccination.