Table 4. Selected clinical and laboratory variables of patients with an HGA diagnosis in China and the United States*.

Variable	China, no. (%) patients†	United States, no. (%) patients‡	p value§
Number	165	44
Headache	38 (23.0)	36 (81.8)	<0.0001
Myalgias	44 (26.7)	33 (75.0)	<0.0001
Diarrhea	63 (38.2)	6 (13.6)	0.002
Leukopenia¶	144/145 (99.3)	24 (54.5)	<0.0001
<100,000 platelets/mm3	151 (91.5)	13 (29.5)	<0.0001

*HGA, human granulocytic anaplasmosis.
†3 case series of HGA published in 2011, 2013, and 2015 (20–22).
‡Case series of culture-confirmed HGA published in 2013 (4).
§Fisher exact test.
¶<4,500, <3,600, <4,000 leukocytes/mm³ for references (4), (20), and (22), respectively.