Table 2.

The Prevalence of Syphilis among Different Blood Donors from 2019 to 2020

Group		Syphilis Status	2019	2020	P value	χ2	OR	95% CI
Gender	Male	Positive	159	165	0.864	0.029
		Negative	57876	58,927
	Prevalence		0.27%	0.28%
	Female	Positive	133	89	0.003	8.646	0.670	0.512–0.877
		Negative	33927	33,891
	Prevalence		0.39%	0.26%
Region	Local	Positive	36	37	0.543	0.370
		Negative	22723	26,930
	Prevalence		0.16%	0.14%
	Foreign	Positive	256	217	0.197	1.663
		Negative	69006	65,893
	Prevalence		0.37%	0.33%
Donation history	First-time	Positive	273	229	<0.001	23.448	1.540	1.291–1.836
		Negative	78529	42,783
	Prevalence		0.35%	0.53%
	Repeat	Positive	19	25	<0.001	13.090	0.349	0.192–0.634
		Negative	13274	50,040
	Prevalence		0.14%	0.05%
Education level	Lower	Positive	218	191	0.730	0.119
		Negative	47706	43,256
	Prevalence		0.45%	0.44%
	Higher	Positive	74	63	0.112	2.520
		Negative	44086	49,241
	Prevalence		0.17%	0.13%
Age	18–29	Positive	66	65	0.975	0.001
		Negative	36675	36,316
	Prevalence		0.18%	0.18%
	30–39	Positive	82	65	0.119	2.433
		Negative	28915	29,686
	Prevalence		0.28%	0.22%
	40–49	Positive	95	90	0.589	0.292
		Negative	18349	18,824
	Prevalence		0.52%	0.48%
	50–60	Positive	49	34	0.090	2.883
		Negative	7864	7961
	Prevalence		0.62%	0.43%