Table 2.

Changes of Japanese encephalitis on latitude and longitude, Gansu Province, China, 1988–2017

Changes in periods*	Longitude		Latitude
	OR	95% CI	OR	95% CI
Period 3–period 1	1.25	1.05–1.50	0.82	0.64–1.04
Period 2–period 1	1.67	1.21–2.30	0.55	0.35–0.87
Period 3–period 2	1.34	1.10–1.63	0.80	0.63–1.02

OR = odds ratio.

^*Period 1 = 1988–1997; period 2 = 1998–2007; period 3 = 2008–2017.