Journal of Occupational Medicine and Toxicology

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]

+ Positive association
- Negative association
± No association
* Risk estimation ≥ 1.5 or ≤ 0.5
§ [15, 29] not included because no effect estimate was given

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