Implementation of nationwide screening of pregnant women for HTLV-1 infection in Japan: analysis of a repeated cross-sectional study

Table 4 Western blot, rate ratio (95% CI), p-value

	WB				WB positive
	Rate ratio	95%CI		P-value	Rate ratio	95%CI		P-value
Years
2011	Reference				Reference
2013	0.57	0.27	1.21	0.1435	0.87	0.66	1.14	0.3168
2016	0.54	0.33	0.88	0.0145	0.59	0.45	0.77	<.0001
Regions
Hokkaido, Tohoku	1.00	0.46	2.20	0.9982	0.30	0.22	0.40	<.0001
Kanto	0.66	0.34	1.27	0.2140	0.29	0.22	0.39	<.0001
Chubu, Tokai	0.88	0.36	2.12	0.7744	0.25	0.19	0.33	<.0001
Kinki	0.85	0.46	1.59	0.6198	0.35	0.27	0.46	<.0001
Chugoku, Shikoku	0.67	0.29	1.52	0.3385	0.27	0.21	0.36	<.0001
Kyusyu, Okinawa	Reference				Reference
Units
High-volume hospital	0.63	0.36	1.08	0.0907	1.59	1.19	2.13	0.0019
Middle- and low-volume hospital and clinic	Reference

ISSN: 1471-2458