Season of birth is not associated with age at menarche in young adults from Central India
Objectives We aimed to test whether birth season is associated with age at menarche in the sub‐tropical climate of Central India where temperature and photoperiod differences between seasons are very small. Methods Date of birth and age at menarche were collected for 330 female students of Central U...
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| Veröffentlicht in: | American journal of human biology 2020-05, Vol.32 (3), p.e23373-n/a |
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| container_title | American journal of human biology |
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| creator | Liczbińska, Grażyna Gautam, Rajesh K. Dubey, Pragya Ahirwar, Ajay K. Chaurasia, Anurag Kosińska, Magdalena |
| description | Objectives
We aimed to test whether birth season is associated with age at menarche in the sub‐tropical climate of Central India where temperature and photoperiod differences between seasons are very small.
Methods
Date of birth and age at menarche were collected for 330 female students of Central University, Sagar. The impact of birth month and birth season on age at menarche was analyzed using ANOVA and time‐to‐event analysis with the use of the Kaplan‐Meier curve.
Results
ANOVA, Kaplan‐Meier estimation and Cox Proportional Hazard did not show statistically significant differences in age at menarche according to birth month and birth season.
Conclusions
Constant sun exposure during the whole year, related to a stable vitamin D amount and to equal access to fruits and vegetables, may translate into a lack of association between seasons and age at menarche. |
| doi_str_mv | 10.1002/ajhb.23373 |
| format | Article |
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We aimed to test whether birth season is associated with age at menarche in the sub‐tropical climate of Central India where temperature and photoperiod differences between seasons are very small.
Methods
Date of birth and age at menarche were collected for 330 female students of Central University, Sagar. The impact of birth month and birth season on age at menarche was analyzed using ANOVA and time‐to‐event analysis with the use of the Kaplan‐Meier curve.
Results
ANOVA, Kaplan‐Meier estimation and Cox Proportional Hazard did not show statistically significant differences in age at menarche according to birth month and birth season.
Conclusions
Constant sun exposure during the whole year, related to a stable vitamin D amount and to equal access to fruits and vegetables, may translate into a lack of association between seasons and age at menarche.</description><identifier>ISSN: 1042-0533</identifier><identifier>EISSN: 1520-6300</identifier><identifier>DOI: 10.1002/ajhb.23373</identifier><identifier>PMID: 31837083</identifier><language>eng</language><publisher>Hoboken, USA: John Wiley & Sons, Inc</publisher><subject>Age ; Birth ; Menarche ; Seasons ; Statistical analysis ; Variance analysis ; Vitamin D ; Young adults</subject><ispartof>American journal of human biology, 2020-05, Vol.32 (3), p.e23373-n/a</ispartof><rights>2019 Wiley Periodicals, Inc.</rights><rights>2020 Wiley Periodicals, Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3573-314be1edd45266b99b276b98535c922c5a47ffbe0ce82914a64813cf95e824f73</citedby><cites>FETCH-LOGICAL-c3573-314be1edd45266b99b276b98535c922c5a47ffbe0ce82914a64813cf95e824f73</cites><orcidid>0000-0002-0922-4612</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fajhb.23373$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fajhb.23373$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,27905,27906,45555,45556</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31837083$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Liczbińska, Grażyna</creatorcontrib><creatorcontrib>Gautam, Rajesh K.</creatorcontrib><creatorcontrib>Dubey, Pragya</creatorcontrib><creatorcontrib>Ahirwar, Ajay K.</creatorcontrib><creatorcontrib>Chaurasia, Anurag</creatorcontrib><creatorcontrib>Kosińska, Magdalena</creatorcontrib><title>Season of birth is not associated with age at menarche in young adults from Central India</title><title>American journal of human biology</title><addtitle>Am J Hum Biol</addtitle><description>Objectives
We aimed to test whether birth season is associated with age at menarche in the sub‐tropical climate of Central India where temperature and photoperiod differences between seasons are very small.
Methods
Date of birth and age at menarche were collected for 330 female students of Central University, Sagar. The impact of birth month and birth season on age at menarche was analyzed using ANOVA and time‐to‐event analysis with the use of the Kaplan‐Meier curve.
Results
ANOVA, Kaplan‐Meier estimation and Cox Proportional Hazard did not show statistically significant differences in age at menarche according to birth month and birth season.
Conclusions
Constant sun exposure during the whole year, related to a stable vitamin D amount and to equal access to fruits and vegetables, may translate into a lack of association between seasons and age at menarche.</description><subject>Age</subject><subject>Birth</subject><subject>Menarche</subject><subject>Seasons</subject><subject>Statistical analysis</subject><subject>Variance analysis</subject><subject>Vitamin D</subject><subject>Young adults</subject><issn>1042-0533</issn><issn>1520-6300</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kE1rGzEQhkVoSJy0l_yAIuilBNYdfezX0TX5xJBD20NPQqudjWV2JVfaJfjfR6mdHHLI6Z0ZHl6Gh5ALBnMGwH_ozbqZcyFKcURmLOeQFQLgU5pB8gxyIU7JWYwbAKgLqE7IqWCVKKESM_L3F-roHfUdbWwY19RG6vxIdYzeWD1iS59sOutHpHqkAzodzBqpdXTnJ_dIdTv1Y6Rd8ANdohuD7umda63-TI473Uf8cshz8uf66vfyNls93NwtF6vMiLwUmWCyQYZtK3NeFE1dN7xMUeUiNzXnJtey7LoGwWDFayZ1ISsmTFfnaZddKc7J933vNvh_E8ZRDTYa7Hvt0E9RJTGyqAsmq4R-e4du_BRc-k5xCRIKqCVL1OWeMsHHGLBT22AHHXaKgXoRrl6Eq__CE_z1UDk1A7Zv6KvhBLA98GR73H1QpRb3tz_3pc_Nt4jp</recordid><startdate>202005</startdate><enddate>202005</enddate><creator>Liczbińska, Grażyna</creator><creator>Gautam, Rajesh K.</creator><creator>Dubey, Pragya</creator><creator>Ahirwar, Ajay K.</creator><creator>Chaurasia, Anurag</creator><creator>Kosińska, Magdalena</creator><general>John Wiley & Sons, Inc</general><general>Wiley Subscription Services, Inc</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QP</scope><scope>7SN</scope><scope>7ST</scope><scope>7T5</scope><scope>7TK</scope><scope>7TM</scope><scope>7TS</scope><scope>C1K</scope><scope>H94</scope><scope>K9.</scope><scope>SOI</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-0922-4612</orcidid></search><sort><creationdate>202005</creationdate><title>Season of birth is not associated with age at menarche in young adults from Central India</title><author>Liczbińska, Grażyna ; Gautam, Rajesh K. ; Dubey, Pragya ; Ahirwar, Ajay K. ; Chaurasia, Anurag ; Kosińska, Magdalena</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3573-314be1edd45266b99b276b98535c922c5a47ffbe0ce82914a64813cf95e824f73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Age</topic><topic>Birth</topic><topic>Menarche</topic><topic>Seasons</topic><topic>Statistical analysis</topic><topic>Variance analysis</topic><topic>Vitamin D</topic><topic>Young adults</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liczbińska, Grażyna</creatorcontrib><creatorcontrib>Gautam, Rajesh K.</creatorcontrib><creatorcontrib>Dubey, Pragya</creatorcontrib><creatorcontrib>Ahirwar, Ajay K.</creatorcontrib><creatorcontrib>Chaurasia, Anurag</creatorcontrib><creatorcontrib>Kosińska, Magdalena</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Immunology Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Physical Education Index</collection><collection>Environmental Sciences and Pollution Management</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>American journal of human biology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Liczbińska, Grażyna</au><au>Gautam, Rajesh K.</au><au>Dubey, Pragya</au><au>Ahirwar, Ajay K.</au><au>Chaurasia, Anurag</au><au>Kosińska, Magdalena</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Season of birth is not associated with age at menarche in young adults from Central India</atitle><jtitle>American journal of human biology</jtitle><addtitle>Am J Hum Biol</addtitle><date>2020-05</date><risdate>2020</risdate><volume>32</volume><issue>3</issue><spage>e23373</spage><epage>n/a</epage><pages>e23373-n/a</pages><issn>1042-0533</issn><eissn>1520-6300</eissn><abstract>Objectives
We aimed to test whether birth season is associated with age at menarche in the sub‐tropical climate of Central India where temperature and photoperiod differences between seasons are very small.
Methods
Date of birth and age at menarche were collected for 330 female students of Central University, Sagar. The impact of birth month and birth season on age at menarche was analyzed using ANOVA and time‐to‐event analysis with the use of the Kaplan‐Meier curve.
Results
ANOVA, Kaplan‐Meier estimation and Cox Proportional Hazard did not show statistically significant differences in age at menarche according to birth month and birth season.
Conclusions
Constant sun exposure during the whole year, related to a stable vitamin D amount and to equal access to fruits and vegetables, may translate into a lack of association between seasons and age at menarche.</abstract><cop>Hoboken, USA</cop><pub>John Wiley & Sons, Inc</pub><pmid>31837083</pmid><doi>10.1002/ajhb.23373</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0002-0922-4612</orcidid></addata></record> |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Age Birth Menarche Seasons Statistical analysis Variance analysis Vitamin D Young adults |
| title | Season of birth is not associated with age at menarche in young adults from Central India |
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