scholarly journals Life course longitudinal growth and risk of knee osteoarthritis at age 53 years: evidence from the 1946 British birth cohort study

2020 ◽  
Author(s):  
Katherine A Staines ◽  
Rebecca J Hardy ◽  
Hasmik J Samvelyan ◽  
Kate A Ward ◽  
Rachel Cooper
Keyword(s):  
Life Course ◽  
Knee Osteoarthritis ◽  
Growth Curve ◽  
Birth Cohort Study ◽  
Childhood And Adolescence ◽  
Limited Evidence ◽  
Male And Female ◽  
Height Gain ◽  
Health And Development ◽  
The Relationship

Objectives To examine the relationship between height gain across childhood and adolescence with knee osteoarthritis in the MRC National Survey of Health and Development (NSHD). Methods Data are from 3035 male and female participants of the NSHD. Height was measured at ages 2, 4, 6, 7, 11 and 15 years, and self-reported at ages 20 and 26 years. Associations between (i) height at each age (ii) height gain during specific life periods (iii) Super-Imposition by Translation And Rotation (SITAR) growth curve variables of height size, tempo and velocity, and knee osteoarthritis at 53 years were tested. Results In sex-adjusted models, taller height at 4 and 6 years were modestly associated with decreased odds of knee osteoarthritis at age 53 (ORs per 1cm increase in height at age 6: 0.97 and age 4: 0.98 (95% CI: 0.95-1.00)). These associations were attenuated after adjustment for potential confounders. Similarly, taller adult achieved height measured at 26 and 53 years of age were associated with decreased odds of knee osteoarthritis (OR per 1cm increase in height: 0.98 (95% CI 0.96 to 1.00)). No associations were found between height gain during specific life periods or the SITAR growth curve variables and odds of knee osteoarthritis. Conclusions There was some limited evidence to suggest that taller height in childhood is associated with decreased odds of knee osteoarthritis at age 53 years in this cohort. This work enhances our understanding of osteoarthritis predisposition and the contribution of life course height to this.

scholarly journals O5-2.5 Life course BMI and risk of knee osteoarthritis at age 53: evidence from the 1946 British birth cohort study

2011 ◽  
Vol 65 (Suppl 1) ◽  
pp. A50-A50
Author(s):  
A. Wills ◽  
S. Black ◽  
R. Coppack ◽  
R. Cooper ◽  
R. Hardy ◽  
...  
Keyword(s):  
Cohort Study ◽  
Life Course ◽  
Knee Osteoarthritis ◽  
Birth Cohort ◽  
Birth Cohort Study

Growth of the blue mackerel Scomber scombrus in Tunisia using the otolith microstructure

2012 ◽  
Vol 93 (2) ◽  
pp. 351-355
Author(s):  
Chédia Jabeur ◽  
Kacem Mahmoudi ◽  
Widien Khoufi ◽  
Eric Morize
Keyword(s):  
Growth Curve ◽  
Purse Seine ◽  
Otolith Microstructure ◽  
Von Bertalanffy ◽  
Male And Female ◽  
Scomber Scombrus ◽  
Length Growth ◽  
Daily Increments ◽  
The Difference ◽  
The Relationship

This paper studies the age and the growth of male and female of the Tunisian blue mackerel Scomber scombrus during 2004–2006. The age was determined by interpreting and counting daily increments on the otoliths sagitta of 320 individuals sampled from landings caught by different gears specially by purse seine. The parameters of the Von Bertalanffy growth curve were estimated for sexes combined: Lf = 31.46(1 − e−0.228 (t+3.034)) (L∞ = 31.46 cm, k = 0.228 per year, t0 = −3.034 years); for male Lf = 27.43(1 − e−0.422 (t+1.747)) (L∞ = 27.43 cm, k = 0.422 per year, t0 = −1.747 years) and for female Lf = 31.70(1 − e−0.227 (t+2.196)) (L∞ = 31.70 cm, k = 0.227 per year, t0 = −2.916 years) for the whole study period. The difference between the growth of male and female is not significant. The relationship between length and weight shows a length growth faster than of the weight with parameters of the equation Wt = a*Lb; a = 9.89*10−5 and b = 2.37 for the sexes combined.

Stockholm Birth Cohort Study 1953—2003: A new tool for life-course studies

2007 ◽  
Vol 35 (1) ◽  
pp. 104-110 ◽  
Author(s):  
Sten-Åke Stenberg ◽  
Denny Vågerö ◽  
Reidar Österman ◽  
Emma Arvidsson ◽  
Cecilia Von Otter ◽  
...  
Keyword(s):  
Cohort Study ◽  
Life Course ◽  
Birth Cohort ◽  
Social Outcomes ◽  
Birth Cohort Study ◽  
Childhood And Adolescence ◽  
Data Sets ◽  
Original Cohort ◽  
Data Set ◽  
Life Course Studies

Aims: To create a new tool for life-course studies of health outcomes as well as social outcomes. Methods: Two anonymous data sets, one a local birth cohort and the other a nationwide registry, covering information from early and middle life, respectively, were matched using a ``key for probability matching'' based on a large number of variables, common to both data sets. The first data set provides social and health information from birth, childhood, and adolescence on boys and girls, born in Stockholm in 1953. The second data set provides information on income, work, and education as well as any inpatient visits and any mortality from mid-life for the entire Swedish population. Results: For 96% of the original cohort it was possible to add data from mid-life. Thus, a new database has been created, referred to as the Stockholm Birth Cohort Study, which provides rich and unique life-course data from birth to age 50 for 14,294 individuals: 7,305 men and 6,989 women. Comparison of matched and unmatched cases in the original cohort suggests that those individuals that could not be matched had slightly more favourable social and intellectual circumstances and had often moved away from Sweden in the 1980s. Conclusion: The new database provides excellent opportunities for life-course studies on health and social outcomes. It allows for studies that have not previously been possible in Sweden or elsewhere. Further, it provides an opportunity for collaborative work with similar databases in Copenhagen and Aberdeen.

Relationship between Faithfulness and Preference of Stars in a Planetarium

2019 ◽  
Vol 2 (1) ◽  
pp. 10402-1-10402-11
Author(s):  
Midori Tanaka ◽  
Takahiko Horiuchi ◽  
Ken’ichi Otani
Keyword(s):  
Light Source ◽  
Preference Rating ◽  
Experimental Procedure ◽  
Male And Female ◽  
Astronomical Observations ◽  
Low Luminance ◽  
Projection Pattern ◽  
The Relationship ◽  
Star Field

Abstract A planetarium imitates a starry sky with physical and technical limitations using a dome, projector, and light source. It is widely used for entertainment, and astronomy and physics educations. In our previous study, we investigated the evaluation for faithful reproduction of a star field in a planetarium by performing psychometric experiments with 20 observers for plural projection patterns with different reproduction factors (color, luminance, and size of projected stars). In this study, we investigate the relationship between faithfulness and preference of a star field in a planetarium through a psychometric experiment with 47 observers. The experimental procedure followed the previous study. The rating of faithfulness improved for the projection pattern with a smaller star size. For the preference evaluation, the projection pattern with low luminance significantly lowered the preference rating. The results of the experiment indicate that the preferable star reproduction was different between male and female observers, whereas the faithful star reproduction was not significantly different in the evaluations between male and female observers. The male observers sought a faithful star reproduction as the preferred reproduction. In contrast, the female observers did not feel the faithful star reproduction preferable, and evaluated the more brilliant star reproduction as the preferred reproduction. These results were not dependent on the experience in astronomical observations.

Folklore and Folklife of American Age Groups and Aging

2018 ◽  
pp. 844-866
Author(s):  
Mary L. Sellers
Keyword(s):  
Life Course ◽  
Group Identity ◽  
Age Groups ◽  
The United States ◽  
Childhood And Adolescence ◽  
Folk Traditions ◽  
Values And Beliefs ◽  
Infancy And Early Childhood ◽  
The Life Course ◽  
Pregnancy And Birth

Folklore occurs at every stage of a person’s life, and this chapter covers the way folklore and folklife across, and of, the life course has been studied. Six divisions in the life course that mark traditions of age groups as well as perceived stages in the United States are pregnancy and birth, infancy and early childhood, childhood and adolescence, adulthood, seniority, and death. Although much of the scholarship of age groups has been on the beginning and end of life, I demonstrate the conditions of aging in adolescence through the senior years that generate folklore and should be studied in relation to formation of age-group identity. This chapter emphasizes the use of folklore as an adaptation to aging. It examines the connection of folk traditions to the role that anxiety plays in the aging process, the formation of self and group identity, and the rites of passage that mark transitions from one stage to another. It shows that the presence of invented and emerging traditions indicates changing values and beliefs across the life course and encourages research in age-based research as a basic component of folklore and folklife studies.

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