Table 1.

Means of the SPQ (%).

Items	1 (Never)	2 (Once)	3 (2–5 times)	4 (>5 times)
1. Although you feel sick, you still force yourself to go to work.	13(3.8)	43(12.6)	152(44.7)	132(38.8)
2. Although you have physical symptoms such as headache or backache, you still force yourself to go to work.	9(2.6)	36(10.6)	139(40.9)	156(45.9)

SPQ, Sickness Presenteeism Questionnaire.