Table 3.
Other characteristics and reasons for exclusion of participants
| Studies | Type of participants | Alcohol consumption | Reasons for exclusion | Patients identification |
|---|---|---|---|---|
| Al-Turki2014 | Primary and secondary infertility | Alcohol consumption was controlled | Patients with azoospermia | Infertility clinic |
| Al-Turki2016 | Primary and secondary infertility | More than 87% of participants do not consume alcohol | Patients with azoospermia | Infertility clinic |
| Anifandis2014 | Not specified | 59.9% participants do not consume alcohol, and 28% were moderate consumers | Infertility clinic | |
| Caserta2012 | Primary infertility | Not specified | Patients with azoospermia, orchitis or prostatitis, grade 2 or 3 varicocele, undescended testes or its surgery, altered karyotype | Infertility clinic |
| Cui2016 | Primary infertility | Not specified | Cryptorchidism, varicocele, infections, anti-sperm antibodies, chromosomal abnormalities | Infertility clinic |
| Gaur2007 | Primary infertility | Not specified | Using contraceptive measures, secondary infertility, occupational exposure to chemicals, cryptorchidism, varicocele, chronic illness, leucocytospermia, azoospermia, age > 45 years | Infertility clinic |
| Meri2013 | Not specified | Not specified | Varicocele, undescended testes, small testes, azoospermia, mumps, history of inguinal hernia or scrotal surgery, chronic medical illness | Infertility clinic |
| Mitra2012 | Not specified | Not specified | Pathology of chronic diseases | Infertility clinic |
| Trummer2002 | Not specified | Not specified | Not specified | Infertility clinic |
| Mostafa2006 | Not specified | Not specified | Not specified | Infertility clinic |
| Osser1992 | Not specified | Not specified | Not specified | Infertility clinic |
| Yu2013 | Not specified | Not specified | Unhealthy, varicocele, infection, obstruction of the vas deferens, chromosomal abnormality, azoospermia, severe oligozoospermia, hemospermia, leukospermia, necrozoospermia | Infertility clinic |
| Zhang2013 | Not specified | Not specified | Azoospermia, excessive alcohol intake, hallucinatory drugs, serious systemic disease, abnormality of the external genitalia, known family genital disorders, infection or trauma to genitals | Infertility clinic |
| Zhang2015 | Not specified | Not specified | Not specified | Infertility clinic |
| Dikshit1987 | Screening for idiopathic infertility | No | Past or present systemic disease, alcohol consumption, genital tract disorder, varicocele, genital infection, hormonal abnormalities or treatment, exposure to radiation, drug abuse | Infertility clinic |
| Kunzle2003 | Men attending the andrology laboratory in the context of infertility investigation | Yes | History of orchitis, testicular trauma, sexually transmitted disease, varicocele, inguinal hernia operation and cryptorchism. |
Infertility clinic |