Table 2.

The pooled positive rates of clinical characters^a

			Pooled	95% CI		Simple pooled
	I2 (%)	p	Rate	Low	Up	Rate
Feverb	85.20	<0.05	0.99	0.97	1.00	0.94
Leucopeniac	0.00	0.70	0.88	0.82	0.94	0.73
Thrombocytopeniad	71.00	0.03	0.83	0.51	1.16	0.65
Anorexia	58.70	0.09	0.83	0.76	0.91	0.85
Weakness	46.70	0.09	0.74	0.54	0.94	0.83
Nausea	34.60	0.21	0.54	0.49	0.60	0.55
Myalgias	49.60	0.09	0.51	0.42	0.60	0.62
Proteinuria	62.30	0.10	0.50	0.39	0.61	0.51
Lymphadenopathy	61.80	0.05	0.39	0.29	0.49	0.35
Vomiting	55.50	0.05	0.39	0.33	0.46	0.38
Joint pain	0.00	0.33	0.35	0.27	0.43	0.28
Chills	30.10	0.24	0.32	0.22	0.43	0.27
Diarrhea	66.60	0.02	0.31	0.23	0.39	0.34
Hematuria	25.10	0.25	0.29	0.22	0.36	0.29
Cough	67.60	0.08	0.28	0.20	0.36	0.26
Abdominal pain	26.80	0.25	0.22	0.15	0.29	0.29
Dizziness	0.00	0.53	0.20	0.16	0.24	0.25
Headache	19.80	0.29	0.17	0.13	0.21	0.22
Case fatality rate	10.60	0.35	0.16	0.13	0.19	0.16
Petechiae	16.70	0.31	0.08	0.06	0.11	0.11

^aThe data would be excluded if it did not mention the corresponding clinical character

^bFever was defined as body temperature ≥38 °C in references [1, 5, 32, 33]; ≥37.5 °C in references [8, 9]; ≥39 °C in reference [6]

^cLeucopenia was defined as leukocyte count <4.0 × 10⁹/L

^dThrombocytopenia was defined as platelet count <150 × 10⁹/L in references [5, 32, 33]; <100 × 10⁹/L in references [1, 8–10]