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Table 3 Summary of epidemiological studies on the occupational risk of reproductive disorders among hairdressers

From: Fertility disorders and pregnancy complications in hairdressers - a systematic review

Outcome Statistically significant Non-
significant*
No
association
Reference
Infertility +    Baste [33]
    ± Hougaard [36]
Subfertility   +   Ronda [30]
Time to pregnancy   +   Kersemaekers [25]
Menstrual disorders§ +    Blatter [23]
   +   Ronda [30]
Premature ovarian failure   +   Gallicchio [34]
Spontaneous abortion 1st period +   2nd period ± Kersemaekers [25]
    ± Zhu [28]
    ± Ronda [31]
    ± Axmon [32]
  +    Baste [33]
Preterm birth    ± Rylander [27]
    ± Zhu [28]
    ± Ronda [31]
  +    Halliday-Bell [38]
Stillbirth -    Goulet [16]
    ± Zhu [28]
Perinatal death +    Halliday-Bell [38]
Small for gestational age +    Rylander [27]
  +    Rylander [35]
    ± Zhu [28]
    ± Ronda [31]
    ± Axmon [37]
  +    Halliday-Bell [38]
Large for gestational age -    Axmon [37]
Low birth weight   +   Kersemaekers [25]
  +    Rylander [27]
    ± Rylander [35]
    ± Axmon [37]
  +    Halliday-Bell [38]
Congenital malformation§   +   Bianchi [12]
  +    Rylander [27]
    ± Zhu [28]
Hypospadias     Vrijheid [14]
   +   Ormond [21]
Orofacial cleft   +   Bianchi [12]
   +   Nguyen [20]
Cleft palate     Lorente [13]
Cleft lip   +   Lorente [13]
    ±  
  +    
Cancer     
Kidney cancer Father +   Mother ± Mutanen [22]
Astrocytoma   +   Kuijten [17]
Neuroblastoma Mother + Father +   Olshan [19]
Brain tumour    ± Cordier [18]
Delayed child 1st period +   2nd period ± Kersemaekers [26]
development    ± Zhu [28]
  1. + Positive association
  2. - Negative association
  3. ± No association
  4. * Risk estimation ≥ 1.5 or ≤ 0.5
  5. § [15, 29] not included because no effect estimate was given