Table 2.

Visual display terminal usage of each age group during the normal and COVID-19 lockdown situations.

Age range	VDT usage (h)		P
	Normal situation	COVID-19 lockdown
	Mean (SD)	Mean (SD)
Age ≤ 60 years
Total	11.03 (5.17)	13.74 (5.50)	< 0.001*
21–30	13.64 (4.59)	15.92 (4.96)	< 0.001*
31–40	12.29 (5.47)	14.69 (5.60)	< 0.001*
41–50	10.47 (5.03)	13.78 (5.09)	< 0.001*
51–60	9.61 (4.73)	12.36 (5.43)	< 0.001*
Age > 60 years
Total	6.84 (3.32)	8.05 (4.15)	< 0.001*
61–70	6.84 (3.08)	8.15 (4.13)	< 0.001*
71–80	6.71 (5.28)	7.36 (4.87)	0.001*

*P < 0.05.