Pregnancy outcomes among female hairdressers who participated in the Danish National Birth Cohort

Vestergaard, Mogens; Hjøllund, Niels Henrik; Olsen, Jørn

doi:10.5271/sjweh.977

Cited by 35 publications

(36 citation statements)

References 21 publications

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“…Although we only identified 33 boys with hypospadias among children of hairdressers, our findings are in line with other studies on hairdressers reporting no association with hypospadias (18,19), cryptorchidism (32), or malformations in general (20). Presumably the levels of exposure to chemical agents, for instance with endocrine-disrupting properties, in hairdressing salons are of insufficient magnitude to interfere adversely with the development of the male reproductive tract.…”

Section: Jørgensen Et Alsupporting

confidence: 80%

“…Some studies report that female hairdressers have an increased risk of having children with major malformations such as hypospadias (15)(16)(17) while others find no support for an increased risk (18)(19)(20). Thus, studies have been conflicting, and -so far -no health problems related to reproduction and fetal development have been identified among hairdressers (21).…”

Section: Jørgensen Et Almentioning

confidence: 93%

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Risk of cryptorchidism and hypospadias among boys of maternal hairdressers – a Danish population-based cohort study

Jørgensen¹,

Jensen²,

Toft³

et al. 2012

Scand J Work Environ Health

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Maldevelopment of children of women working as hairdressers has been a concern because of exposure to endocrine disrupters. Maternal occupation as hairdresser and risk of cryptorchidism and hypospadias was examined in a cohort of more than 500 000 male infants of occupationally active women. Boys of hairdressers were not at increased risk of cryptorchidism or hypospadias compared to other boys.Affiliation:

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Section: Jørgensen Et Alsupporting

confidence: 80%

Section: Jørgensen Et Almentioning

confidence: 93%

Risk of cryptorchidism and hypospadias among boys of maternal hairdressers – a Danish population-based cohort study

Jørgensen¹,

Jensen²,

Toft³

et al. 2012

Scand J Work Environ Health

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“…Only one study showed a significant increase in PB in hairdressers compared with teachers as referent group 27) . For the other studies, no significant results were reported 16,[22][23][24][25][26]28) . Using a fixed effect model (heterogeneity test, p=0.21), RRc was not significantly increased (RRc=1.05 (95% CI: 0.99−1.11)).…”

Section: Premature Birth (<37 Weeks Of Gestation)mentioning

confidence: 88%

“…For this outcome, fourteen estimates from ten studies (three cohorts 16,22,23) , two case-control studies 32,33) , four cross-sectional studies 17,25,26,34) , and one register study 29) ) were integrated in the metaanalysis. Of them, two studies were carried out on cosmetologists 26,33) and eight studies were carried out on hairdressers.…”

Section: Embryonic and Fetal Lossesmentioning

confidence: 99%

“…For the period of up to 24 AW (data not shown), the strength of association was stronger but not significant (RRc=1.30 (95% CI: 0.99−1.71)). One study 33) out of four 20,23,25) reported a dose-response relationship between spontaneous abortion and the number of weekly technical tasks. The results were stable in sensitivity analyses except for two situations ( Table 2).…”

Section: Embryonic and Fetal Lossesmentioning

confidence: 99%

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Reproductive disorders in hairdressers and cosmetologists: a meta‐analytical approach

Henrotin

Picot

Bouslama

et al. 2015

Journal of Occupational Health

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small for gestational age, which had an RRc of 1.24 (95 CI%: 1.10−1.41); low birth weight, which had an RRc of 1.21 (95% CI: 1.06−1.39); and embryonic and fetal losses, which had an RRc of 1.19 (95% CI: 1.03−1.38). Conclusions: This work confirms a weak increase in risk of some reproductive disorders in female hairdressers/cosmetologists. However, the evidence level is rather weak, and a causal association between job and reproductive outcomes cannot be asserted. (J Occup Health 2015; 57: 485−496)

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Association of hairdressing with cancer and reproductive diseases: A systematic review

Babić

Macan

Franić

et al. 2022

Journal of Occupational Health

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Objectives To review recent epidemiological studies investigating carcinogenic or reprotoxic effects among hairdressers who seem to be at greater risk for systemic adverse effects of chemicals released from hair care products than consumers. Methods A systematic review according to the PRISMA‐P guidelines was performed and included studies published from 2000 to August 2021, in which cancer or adverse reproductive effects were diagnosed in 1995 and onward. Data were synthetized qualitatively due to the small number of studies, heterogeneity of study designs, outcomes, and methods. Results Four studies investigating cancer frequencies and six studies investigating effects on reproduction among hairdressers were identified. All were of good quality and with low risk of bias. Only one of the four studies found an increased risk of cancer reporting nine times higher odds for bladder cancer in hairdressers than the population‐based controls. Three other studies investigating bladder and lung cancer, and non‐Hodgins lymphoma did not find an increased risk in hairdressers. Regarding reprotoxic effects, numerous outcomes were investigated including menstrual disorders, congenital malformations, fetal loss, small‐for‐gestational age newborns, preterm delivery, and infertility. Increased risk was found for ventricular septal defect in newborns of fathers working as hairdressers. Furthermore, several indices of poor neonatal or maternal health were significantly associated with mothers working as hairdresser. Conclusions Despite the scarce evidence that hairdressers are at increased risk of carcinogenic or reprotoxic effects related to their trade, such health risks cannot be ruled out. Therefore, preventive efforts to diminish occupational exposures to hairdressing chemicals should be targeted.

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Pregnancy outcomes among female hairdressers who participated in the Danish National Birth Cohort

Cited by 35 publications

References 21 publications

Risk of cryptorchidism and hypospadias among boys of maternal hairdressers – a Danish population-based cohort study

Risk of cryptorchidism and hypospadias among boys of maternal hairdressers – a Danish population-based cohort study

Reproductive disorders in hairdressers and cosmetologists: a meta‐analytical approach

Association of hairdressing with cancer and reproductive diseases: A systematic review

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