Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Birth Order”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 253 records · Page 14Linked to original sources
PubMed2005

Birth order and personality.

In a sample of 273 American undergraduates, scores on a battery of personality tests did not differ by birth order in 2-child or 3-child families.

Adult↗
PubMed1978

Child spacing and birth order: effect on intellectual ability in two-child families.

The effect on intellectual ability of the spacing of the birth of siblings was studied in two series of young men from two-child families: (i) 535 pairs of brothers and (ii) 1511 unrelated firstborn and secondborn. Birth-order effect and level of ability were not influenced by length of interval between firstborn and secondborn.

Birth Order↗
PubMed1978

A statistical analysis of birth-order effects with application to data on pyloric stenosis.

A method is presented for correcting incomplete data for birth-order analysis and variations in the ascertained incidence of affected individuals are allowed. The statistical analysis involves application of a test developed by Wilcoxon, Mann and Whitney, and Haldane and Smith. Examples are detailed for data correction, and the analysis of data for pyloric stenosis is discussed.

Birth Order↗
PubMed1978

A study of environmental factors in relation to fatal infantile spinal muscular atrophy (SMA type I). An analysis of birth order and parental age effects, social class, seasonal influence, and clustering in time and place.

Major studies of the childhood spinal muscular atrophies have suggested that environmentally-produced phenocopies might occur, and that environmental factors might be important in some clinical features of these diseases. A formal analysis of some possible intra-uterine and post-natal influences has been undertaken in 78 index cases (72 families) of acute infantile SMA (acute Werdnig-Hoffmann disease; SMA Type I). There is no evidence to suggest that social class, parental age, birth order, or season of birth influences this disease or that clustering in time and place occurs.

Acute Disease↗
PubMed1981

Three measures of death anxiety: birth order effects and concurrent validity.

Investigated the concurrent validity of three measures of death anxiety and the effect of birth order on death anxiety as measured by each of the scales. Ss were 100 undergraduate students at a large, private, midwestern university. Results showed significant intercorrelations (p less than .001) among the three scales; only one scale (Templer) differentiated first-born and only children from later-born children. The former had higher death anxiety scores (p less than .05).

Adult↗
PubMed1990

Fertility projection based on birth order data--a Swedish approach.

"The decreasing fertility rates in Sweden during the 1970s can be explained as postponement of childbearing. An increasingly larger part of each generation has chosen to bear children at a late age, after education and some years of occupational work. As a consequence, the yearly age-specific rates will, in years to come, change systematically towards relatively high rates for women in the second half of the fertile period; changes which are important in population projections. To predict the future rates a model based on birth order data and assumptions about the final family size is used. The model and its application in the 1989 projection of the Swedish population is discussed in the paper. Alternative projections and the assumptions behind the alternatives are specified."

Birth Order↗
PubMed1977

Birth order and perceptual motor performance.

To examine the relationship between performance on the Frostig Developmental Test of Visual Perception and birth order, 578 first-graders were tested. Later-born children performed significantly better than did firstborns on specific subtests of the Frostig (Visual-motor Coordination and Figure-ground Perception). There was a significant interaction on Perceptual Constancy which indicated that later-born males performed significantly better than did firstborn males. A secondary finding was a r of .547, a stronger relationship between intelligence level and global perceptual performance than previously reported.

Birth Order↗
PubMed2003

Post-transcriptional regulation of the E/Daughterless ortholog HLH-2, negative feedback, and birth order bias during the AC/VU decision in C. elegans.

The anchor cell/ventral uterine precursor cell (AC/VU) decision in Caenorhabditis elegans is a canonical example of lin-12/Notch-mediated lateral specification. Two initially equivalent cells interact via the receptor LIN-12 and its ligand LAG-2, so that one becomes the AC and the other a VU. During this interaction, feedback loops amplify a small difference in lin-12 activity, limiting lin-12 transcription to the presumptive VU and lag-2 transcription to the presumptive AC. Here, we find that hlh-2 appears to be required for the VU fate and directly activates lag-2 transcription in the presumptive AC. HLH-2 appears to accumulate selectively in the presumptive AC prior to differential transcription of lin-12 or lag-2, and is therefore the earliest detectable difference between the two cells undergoing the AC/VU decision. The restricted accumulation of HLH-2 to the presumptive AC reflects post-transcriptional down-regulation of HLH-2 in the presumptive VU. Our observations suggest that hlh-2 is regulated as part of the negative feedback that down-regulates lag-2 transcription in the presumptive VU. Finally, we show that the AC/VU decision in an individual hermaphrodite is biased by the relative birth order of the two cells, so that the first-born cell is more likely to become the VU. We propose models to suggest how birth order, HLH-2 accumulation, and transcription of lag-2 may be linked during the AC/VU decision.

Animals↗
PubMed1992

Morbidity in early childhood, sex differences, birth order and social class.

STUDY OBJECTIVE: The aim of the study was to investigate the relationship between morbidity in early childhood and gender, birth order, and social class. DESIGN: The study used data collected in the Nijmegen Continuous Morbidity Registration. All presented morbidity and a number of personal data were available. SETTING: The survey population was regional; four general practices in the east of The Netherlands. PARTICIPANTS: The study population included all children born in the four practices from 1971 to 1984. They were followed up till the age of five (1537 children). MEASUREMENTS AND MAIN RESULTS: Morbidity of children in the first five years was allocated to three degrees of seriousness and to 14 diagnosis groups. The morbidity of all children was analysed for boys and girls, first-born, second-born, and later-born children, and low, middle, and high social class. Boys presented more morbidity than girls; in particular, nervous disorders, lower respiratory tract infections, and accidents. First-born children presented more morbidity than later-born children; in particular, non-serious diseases, nervous disorders, and colds. Lower social class children presented more moderately serious and non-serious morbidity, colds, lower respiratory tract infections, and skin diseases. Logistic regression analysis showed that high social class, being the first-born child, and male gender were the most important factors related to presented morbidity in general practice. CONCLUSIONS: High social class, low social class, gender, and being the first-born child were, in this sequence, related to morbidity in early childhood presented to the general practitioner in this study population.

Birth Order↗
PubMed1999

Risks of preterm delivery and association with maternal age, birth order, and fetal gender.

The risk of preterm delivery in a recent sample (1990-1994) of Italian liveborns was examined, taking into account child birth order, and maternal age and education in addition to the fetal gender. Univariate analyses showed that a higher risk was associated with male than female babies, with first- than second-born children, with older mothers, and with less educated mothers. The relative weights of the factors examined were evaluated through logistic regression analyses and the highest and the lowest risks were found to be associated with advanced maternal age and male fetal gender respectively. Our findings therefore suggest that biological factors associated more with advanced maternal age than with the male gender of the fetus may influence premature onset of labour.

Birth Order↗