Table 2.

Proportion of workers screened for hepatitis B surface (HBs) antigen and hepatitis C virus (HCV) antibody by type of health insurance, sex, and age (all ages and 40 years or older).

	All ages			Age ≥ 40 years
	Men	Women	All	Men	Women	All
Union Health Insurance
No. who had mandatory health examinations	1,129,553	640,682	1,770,235	661,094	372,664	1,033,758
No. tested for HBs antigen	86,291	51,936	138,227	65,277	35,777	101,054
Proportion tested for HBs antigen (%)	7.64	8.11	7.81	9.87	9.60	9.78
95% CI (%)	7.59–7.69	8.04–8.17	7.77–7.85	9.80–9.94	9.51–9.69	9.72–9.83
No. tested for HCV antibody	52,729	34,561	87,290	38,716	22,487	61,203
Proportion tested for (%)	4.67	5.39	4.93	5.86	6.03	5.92
95% CI (%)	4.63–4.71	5.34–5.45	4.90–4.96	5.80–5.91	5.96–6.11	5.87–5.66
Japan Health Insurance Association
No. who had mandatory health examinations	607,552	308,327	915,879	450,293	225,093	675,386
No. tested for HBs antigen	18,230	15,393	33,623	14,928	11,866	26,794
Proportion tested for HBs antigen (%)	3.00	4.99	3.67	3.32	5.27	3.97
95% CI (%)	2.96–3.04	4.91–5.07	3.63–3.71	3.26–3.36	5.18–5.36	3.92–4.01
No. positive for HCV antibody	14,052	12,916	26,968	11,255	9,856	21,111
Proportion tested for HCV antibody (%)	2.3	4.2	2.9	2.5	4.4	3.1
95% CI (%)	2.28–2.35	4.12–4.26	2.91–2.98	2.45–2.55	4.29–4.46	3.08–3.17