Table 5.

Result of meta-regression

Variable	Sub-groups	Mean age
	Coefficient	SE	P-value
Signs and symptoms	Cough	0.192	0.207	0.354
	Diarrhea	0.103	0.392	0.792
	Dyspnea	-0.110	0.236	0.640
	Fatigue	0.676	0.405	0.095
	Fever	0.477	0.223	0.033
	Myalgia	0.0	0.322	0.999
	Sore throat	-0.117	0.520	0.821
	Post-partum fever	-0.001	0.192	0.995
Laboratory tests	Lymphopenia	0.309	0.252	0.220
	Leukocytosis	0.092	0.324	0.775
	Elevated neutrophil ratio	0.141	0.443	0.749
	Elevated C-reactive protein	0.057	0.231	0.802
	Decreased lymphocyte ratio	-0.649	0.431	0.131
Type of delivery	Cesarean	0.433	0.180	0.016
SE: Standard error