Table 1 The characteristics of included studies
Author | Publication year | Country | Mean age(case/controls) | Sample Size(Cases/controls) | Semen parameters |
|---|---|---|---|---|---|
Chen et al. | 1998 | China | 30.53/30.43 | 17/7 | SV, DL,STM,SC |
Wang et al. | 2000 | China | N/N | 68/42 | SV, SC,STM |
Motrich et al. | 2005 | Argentina | 41.41/32.18 | 15/15 | SV, SPV, SPM,STM |
Hu et al. | 2007 | China | 38.62/30.45 | 41/12 | SV, SPV, SPM, STM |
Hu et al. | 2008 | China | 38.60/32.00 | 41/12 | SV, SPM,STM,SPV |
Li et al. | 2009 | China | N/33 | 17/30 | SV, DL, SPV, SC |
Ausmees et al. | 2013 | Estonia | 55.30/56.10 | 50/35 | SV,SC,SPM |
