What women want - quantifying the perception of hair amount: an analysis of hair diameter and density changes with age in caucasian women

Robbins, Clarence R.; Mirmirani, Paradi; Messenger, A.G.; Birch, M.P.; Youngquist, R.S.; Tamura, Mina; Filloon, T.; Luo, Fangyi; Dawson, Thomas L.

doi:10.1111/j.1365-2133.2012.11010.x

Cited by 59 publications

(68 citation statements)

References 30 publications

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“…The decline in Chinese women's hair diameter after reaching its peak in 40s is similar to other studies with Caucasian and Japanese people [10].…”

Section: Discussionsupporting

confidence: 89%

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

Kim¹,

Kim²,

An³

et al. 2017

JCDSA

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There are previous studies of ageing hair and scalp in Caucasians and some Asians, such as Koreans and Japanese. However, the characteristics of scalp and hair have not yet been studied in Chinese, the largest population in the world, especially in terms of ageing. The purpose of this study is to investigate ageing features in Chinese women's hair and scalp. Methods: In total, 1343 women in China aged 20 to 65 participated in this research. Hair density and diameter were measured and analysed with Folliscope®. Hair color and scalp conditions such as dandruff and erythema were evaluated through microscopic images. Measuring equipment was also used to detect scalp water content, barrier function and sebum secretion. Results: Hair density decreased gradually with ageing, while hair diameter peaked at 40s. The color of hair became bright with ageing because of gray hair and color fading. The degree of scalp sebum and dandruff was higher at younger ages. Interestingly, scalp erythema became more severe with ageing. Conclusion: This study shows the physical and physiological changes of Chinese women's hair and scalp. Most aging features (hair diameter, scalpsebum contents, dandruff and erythema) were noticeable in their 40s, but hair density began to decline in their 30s. This first study of aging hair and scalp in Chinese women would be helpful for understanding the ageing phenomenon and development of hair and scalp care products.

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“…The decline in Chinese women's hair diameter after reaching its peak in 40s is similar to other studies with Caucasian and Japanese people [10].…”

Section: Discussionsupporting

confidence: 89%

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

Kim¹,

Kim²,

An³

et al. 2017

JCDSA

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“…Moreover, less secretion of sebum into the hair canal causes increased adhesion between hair root sheath and hair shaft, which can finally result in hair breakage. Age-related degeneration of sebaceous glands caused by menopausal changes [25,26] can be enhanced by CT and might be the reason for the significant difference in the success of scalp cooling in elderly menopausal women found in this study [26,27].…”

Section: Discussionmentioning

confidence: 85%

“…Robbins et al [25] found that the hair of postmenopausal women has a smaller diameter. If the proliferation of ceratinocytes in hair follicles in the anagen phase is hampered by cytostatics, hair with reduced diameter is produced.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Various Parameters on the Success of Sensor-Controlled Scalp Cooling in Preventing Chemotherapy-Induced Alopecia

et al. 2015

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Background: The influence of systemic comorbidities on the success of scalp cooling during chemotherapy (CT) is widely unexplored. Comorbidities often require additional medication which itself can occasionally cause alopecia. This study investigates the influence of selected parameters on the efficacy of scalp cooling for the prevention of CT-induced alopecia. Patients and Methods: 226 cancer patients were treated with various CT regimens in combination with sensor-controlled scalp cooling. 136 breast cancer patients received (neo)adjuvant therapy, and 76 of these patients received epirubicine and cyclophosphamide (4× EC 3w) followed by paclitaxel (12× T w). The following parameters were prospectively investigated: chemotherapy-induced alopecia, systemic comorbidities and co-medication, nicotine abuse, hair treatment, menopausal status, and trichologic status. Results: Scalp cooling was successful (no or not visible hair loss; common toxicity criteria 0-1) in 65% of all patients, in 65% of the 136 breast cancer patients, and in 68% of the 76 patients receiving EC/T. In this subgroup, premenopausal patients (p = 0.009) and those without systemic comorbidities (p = 0.003), without co-medication (p < 0.001) and with high hair density (p = 0.038) showed less hair loss during CT; an effect was also seen for nicotine abuse (p = 0.023). Hair length and hair treatment had no significant influence. Conclusion: Sensor-controlled scalp cooling represents an effective addition to supportive cancer therapy. The success of scalp cooling depends on the applied CT regimen. Parameters like menopausal status, systemic comorbidities, medication, nicotine abuse, and original hair density also influence the outcome of hair loss prevention.

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“…In a sample of some 18,000 Japanese women (ages 10–60 years), hair diameter was found to be largest around the age of 40, and lower diameters were found before and after that age (Otsuka and Nemoto, 1988). Likewise, Robbins et al (2012) reported that in a sample of 1,099 Caucasian women (ages 18–66 years), hair diameter was largest in women aged 43–46 years. These authors conclude that a lower rate of hair diameter increase, combined with the decrease in density, begins to significantly impact the perception of hair amount so that thinning becomes increasingly more noticeable in the mid 40ies to the mid to late 50ies.…”

Section: Methodsmentioning

confidence: 96%

Age, Health and Attractiveness Perception of Virtual (Rendered) Human Hair

Fink

Hufschmidt

Hirn³

et al. 2016

Front. Psychol.

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The social significance of physical appearance and beauty has been documented in many studies. It is known that even subtle manipulations of facial morphology and skin condition can alter people’s perception of a person’s age, health and attractiveness. While the variation in facial morphology and skin condition cues has been studied quite extensively, comparably little is known on the effect of hair on social perception. This has been partly caused by the technical difficulty of creating appropriate stimuli for investigations of people’s response to systematic variation of certain hair characteristics, such as color and style, while keeping other features constant. Here, we present a modeling approach to the investigation of human hair perception using computer-generated, virtual (rendered) human hair. In three experiments, we manipulated hair diameter (Experiment 1), hair density (Experiment 2), and hair style (Experiment 3) of human (female) head hair and studied perceptions of age, health and attractiveness. Our results show that even subtle changes in these features have an impact on hair perception. We discuss our findings with reference to previous studies on condition-dependent quality cues in women that influence human social perception, thereby suggesting that hair is a salient feature of human physical appearance, which contributes to the perception of beauty.

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What women want - quantifying the perception of hair amount: an analysis of hair diameter and density changes with age in caucasian women

Cited by 59 publications

References 30 publications

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

Ageing-Related Features of Hair and Scalp in Chinese Women by Clinical Evaluation Study

The Influence of Various Parameters on the Success of Sensor-Controlled Scalp Cooling in Preventing Chemotherapy-Induced Alopecia

Age, Health and Attractiveness Perception of Virtual (Rendered) Human Hair

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