Middle East Fertility Society Journal

Table 4 Meta-regression analysis for the potential variables between studies

From: Association between ambient particulate matter and semen quality parameters: a systematic review and meta-analysis

	No. studies	Coefficient	Standard error	p	95% CI
Exposure window
PM2.5	7	0.062	0.00	0.57	−0.001 to 0.002
PM10	6	0.056	0.00	0.61	−0.000 to 0.023
BMI
PM2.5	7	0.042	0.03	0.14	−0.016 to 0.115
PM10	6	0.083	0.03	0.02	0.023 to 0.105
Age
PM2.5	7	0.052	0.023	0.02	0.008 to 0101
PM10	6	0.041	0.02	0.76	−0.004 to 0.087

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