Table 3. Crude and adjusted estimated mean of psychological distress^a at baseline (T1), T2 and T3 under the COVID-19 pandemic among a cohort of Japanese full-time employees: mixed model with repeated measures (N = 1,275).

Survey (time of survey)	Estimated means (SE)
	Crude		Adjusted^b

	Low Education^c	High Education^c	Low Education^c	High Education^c
T1 (March 2020)	41.0 (0.5)	41.2 (0.4)	41.2 (0.5)	41.3 (0.4)
T2 (May 2020)	41.5 (0.5)	40.8 (0.5)	41.7 (0.5)	40.9 (0.5)
T3 (August 2020)	42.5 (0.5)	41.4 (0.5)	42.6 (0.5)	41.5 (0.5)

SE: standard error.

^aPsychological distress was measured using a scale from the Brief Job Stress Questionnaire (BJSQ). Scores ranged from 18 to 72, with a higher score indicative of higher distress. Cronbach’s alpha coefficients of the scale ranged from 0.93–0.94 among the T1, T2, and T3 surveys.

^bAdjusted for age, gender, and marital status.

^cHigh education was defined as ≥16 years of educational attainment (ie, university graduate or higher).

Table 3. Crude and adjusted estimated mean of psychological distressa at baseline (T1), T2 and T3 under the COVID-19 pandemic among a cohort of Japanese full-time employees: mixed model with repeated measures (N = 1,275).

Table 3. Crude and adjusted estimated mean of psychological distress^a at baseline (T1), T2 and T3 under the COVID-19 pandemic among a cohort of Japanese full-time employees: mixed model with repeated measures (N = 1,275).