Lawrence P Greksa
Dados Biográficos
| ID | 76759 |
|---|---|
| NOME | Lawrence P Greksa |
| PRENOMES | Lawrence P |
| SOBRENOME | Greksa |
| ASSINATURA | GREKSA L P |
| AFILIAÇÕES | Case Western Reserve University |
| ORCID | 0000-0003-1647-7076 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 27 |
| TOTAL DE CITAÇÕES | 80 |
| TOTAL COMO AUTOR | 27 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1982 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2017 |
| ÍNDICE H | 5 |
Dietary Patterns and Dietary Adequacy of Street Children in Dhaka, Bangladesh
The negative impact of poverty on the biological well-being of children is well established. The purpose of the present study was to evaluate the impact of the stress of full-time street life on the dietary patterns and dietary adequacy of street children living in Dhaka, Bangladesh. This was accomplished by comparing the nutritional patterns of full-time street children with those of other poor children in Dhaka who also spend their days on the …
Growth and health status of street children in Dhaka, Bangladesh
The purpose of this study was to assess the effect of street life on the growth and health status of poor children who live and work full‐time on the streets of Dhaka, Bangladesh (street children), independent of the effects of poverty. This was accomplished by comparing 142 street children with 150 poor children who live and work on the streets of Dhaka but who return to their families at night (slum children). Children between 7–14 years old we…
Birth Seasonality in the Old Order Amish
The Old Order Amish are a healthy and well-nourished natural fertility population, so that the timing of births is not influenced by behaviours to limit family size, undernutrition or disease. The present study examines the monthly distribution of 8160 births occurring between 1920 and 1991 in the Geauga Settlement in north-east Ohio, USA. The monthly distribution of births in the Geauga Settlement is bimodal, with a major peak extending from Aug…
Seasonal variation in the dietary adequacy of highland Pwo and Sgaw Karen (Thailand)
The present report describes seasonal variability (postharvest, preharvest, harvest) in the dietary adequacy of highland Karen farmers (38 Pwo and 51 Sgaw mother-weaned child pairs) in Thailand. Both the Pwo and Sgaw exhibit little functionally significant seasonal variation in either energy or protein intakes, although there is significant seasonal variation in other nutrients. Sgaw Karen mothers and their weaned children had significantly highe…
Population growth and fertility patterns in an Old Order Amish settlement
There is some suggestion of fertility control by Amish families. However, this control appears to be independent of parity, suggesting that there is no intention to limit family size. It is therefore reasonable to conclude that the Amish in the Geauga Settlement are a natural fertility population
Skin reflectance of lowland Bolivian youths of European ancestry
The skin reflectances of 257 Bolivian youths of European ancestry (140 males, 117 females; 9.0-19.9 yr) residing in Santa Cruz, Bolivia (average altitude of 400 m) are described. Reflectances were measured at three wavelengths (425 nm, 545 nm, and 685 nm) on two different sites, the medial surface of the inner upper arm and the forehead. Males tended to be darker than females, significantly on the inner upper arm (P .05). The results of compariso…
Child health, nutrition, and physical activity
Dietary patterns and dietary adequacy of highland Pwo and Sgaw Karen of northwest Thailand
The present study compared the dietary patterns, dietary adequacy, and anthropometric indices of nutritional status of mothers and their weaned children during three measurement periods (post‐harvest, pre‐harvest, and harvest) between Pwo and Sgaw Karen Highlanders residing in northwest Thailand. Pwo mothers and their weaned children tended to have significantly less diverse diets than their Sgaw counterparts. As a result, the post‐harvest %RDIs …
Total lung capacity in Andean highlanders
Total lung capacity (TLC), residual volume (RV), and vital capacity (VC), as well as related measures of pulmonary function, were assessed in a sample of 39 male and 23 female native highlanders of Aymara ancestry (20.1–28.8 years) who were residing in La Paz, Bolivia (average altitude of about 3,600 m). After controlling for body and chest size, most measures of respiratory function were significantly larger in males than females ( P P
Total lung capacity in young highlanders of Aymara ancestry
Total lung capacity (TLC) and its components, including residual volume (RV) and vital capacity (VC), are described in a sample of 164 male and 143 female youths of Aymara ancestry (10.0–19.9 years) who were born and raised at high altitudes (> 2,500 m) and who were residing in La Paz, Bolivia (average altitude of about 3,600 m). The hypothesis was tested that the enhanced lung volumes of adult highlanders are attained during the period of growth…
Maximal aerobic power in high-altitude runners
Maximal aerobic power (VO2max) was assessed in seven male and one female middle- and long-distance recreational runners residing in La Paz, Bolivia (3600 m). All runners were born and raised at high altitudes (> 2500). Mean VO2max in the male runners was 60.8 ml/kg/min while VO2max in the female runner was 55.5 ml/kg/min. These values are higher than in any previously reported sample of either trained or untrained high-altitude natives. In additi…
Growth and health status of preschool Karen highlanders
The physical growth and health status of preschool (< 6 years) Karen highlanders belonging to the Pwo (212 males, 227 females) and Sgaw (107 males, 101 females) ethnic groups, and residing in northwest Thailand are described in the present report. The growth and health status of Thai tribal groups, including the Karen, is generally assumed to be substantially poorer than those of Thai lowlanders, who are primarily of Thai ancestry. However, the K…
Surnames as indicators of European admixture in Andean Indians
The goal of the present report was to determine how well surnames assess the degree of European admixture in urban Aymara. Reflectances, which were measured at three wavelengths (425 nm, 545 nm, and 685 nm) and on two sites (the medial surface of the upper arm and the forehead), were used as genetic markers. The sample consisted of 556 Andean Indians of Aymara ancestry (305 males, 251 females; 10.0–29.9 yr) residing in La Paz, Bolivia (average al…
Skin reflectance of children and young adults of Aymara ancestry
The skin reflectance of 556 Andean Indians of Aymara ancestry (305 males, 251 females; 10.0–29.9 yr) residing in La Paz, Bolivia (average altitude of about 3,600 m) is described. Reflectances were measured at three wavelengths (425 nm, 545 nm, and 685 nm) on two different sites, the medial surface of the upper arm and forehead. Males tended to be significantly darker than females on both the upper arm and forehead ( P P
Developmental responses to high‐altitude hypoxia in Bolivian children of European ancestry
The developmental adaptation hypothesis (DAH) proposes that highlanders adapt to their hypobaric hypoxic environment during growth and development. This report utilizes data on children (9.0-19.9 yr) of European ancestry residing in Santa Cruz and La Paz, Bolivia, to test selected aspects of the DAH. Previous tests of this hypothesis have been hampered by difficulties in controlling for socioeconomic and genetic influences. However, due to their …
Age of menarche in Bolivian girls of European and Aymara ancestry
Median age of menarche was determined in children of European and Aymara ancestry residing in La Paz, Bolivia (3600 m) and in children of European ancestry residing in Santa Cruz, Bolivia (400 m). Median age of menarche in European and Aymara highland natives was younger than reported by previous researchers, thus broadening the range of variation in age of menarche in high-altitude populations. Comparisons between La Paz and Santa Cruz European …
General/Theoretical Anthropology
Effect of altitude on the lung function of high altitude residents of European ancestry
The forced vital capacity (FVC), forced expiratory volume in one second (FEV), and ratio of FEV to FVC (%FEV) of 161 male and 158 female youths of European ancestry who were born at high altitudes and who were residing in La Paz, Bolivia (average altitude of 3,600 m) were examined and compared with those for lowland Europeans and highland Aymara Amerindians. FVC and FEV were significantly larger (p
Lung function of young Aymara highlanders
The patterns of development of FVC, FEV and %FEV are examined in 217 male and 195 female youths of Aymara ancestry residing in La Paz, Bolivia (altitude 3600 m). The data provide some evidence of an acceleration in the development of lung function relative to stature in Aymara children, beginning during early adolescence, and also indicate that there is a strong relationship between lung function and chest dimensions in Aymara children. Similar p…
Biological Anthropology
Growth Patterns of European and Amerindian High-Altitude Natives
Effect of altitude on the physical growth of upper-class children of European ancestry
The physical growth of 351 upper-socioeconomic-status children (9-20 years) of European ancestry residing in La Paz, Bolivia (altitude 3600 m) is described and compared with that of lowland children of similar background. The purpose is to evaluate the independent effect of continual exposure to atmospheric hypoxia during the period of growth and development on linear growth. The data presented here indicate that the effect of hypoxia on achieved…
Maximal exercise capacity in adolescent European and Amerindian high‐altitude natives
Forty‐seven highland natives were given maximal exercise tests on a treadmill ergometer at 3,600 m. The subjects were grouped into four subsamples on the basis of ethnicity (European vs. Aymara) and age (young vs. old adolescent). Two‐way ANOVA indicated that VO 2 max adjusted for body size did not differ significantly between ethnic groups but was significantly larger in older than younger boys within each ethnic group (p 2 max's of highlanders …
Anthropometric survey of high-altitude Bolivian porters
This paper presents the results of an anthropometric survey of 138 rural Aymaran high-altitude males who were working as porters in La Paz, Bolivia (3700 m). All subjects were measured for stature, weight, upper arm circumference, and triceps skinfolds. The body size and composition of the porters were then compared to an Aymaran rural population from the Bolivian highlands, and urban mestizo labourers from La Paz. The porters were smaller than t…
Work performance of high-altitude Aymara males
The sample for this study consisted of 28 Aymara males between the ages of 15 and 43 years. The subjects were rural high-altitude natives who were temporarily working as porters in La Paz, Bolivia (3700 m). Mean VO2max was 46 X 5 ml/kg/min. There was a significant negative relationship between VO2max and age in adult porters . However, there was also a significant positive relationship between maximal work output and age and a significant negativ…
The physical growth of urban children at high altitude
The physical growth of urban Aymara children residing in La Paz, Bolivia (3,600 m) is described and compared with Amerindian children residing at low and high altitudes and with low‐altitude U.S. children. The sample consists of 227 males (10.6–19.7 yr) and 219 females (11.2–19.8 yr). The urban La Paz children were taller at all ages than rural high altitude Amerindian children but similar in stature to urban high altitude children from Peru. The…
Growth Patterns of European and Amerindian High-Altitude Natives
Effect of altitude on the lung function of high altitude residents of European ancestry
The forced vital capacity (FVC), forced expiratory volume in one second (FEV), and ratio of FEV to FVC (%FEV) of 161 male and 158 female youths of European ancestry who were born at high altitudes and who were residing in La Paz, Bolivia (average altitude of 3,600 m) were examined and compared with those for lowland Europeans and highland Aymara Amerindians. FVC and FEV were significantly larger (p
Maximal exercise capacity in adolescent European and Amerindian high‐altitude natives
Forty‐seven highland natives were given maximal exercise tests on a treadmill ergometer at 3,600 m. The subjects were grouped into four subsamples on the basis of ethnicity (European vs. Aymara) and age (young vs. old adolescent). Two‐way ANOVA indicated that VO 2 max adjusted for body size did not differ significantly between ethnic groups but was significantly larger in older than younger boys within each ethnic group (p 2 max's of highlanders …
Surnames as indicators of European admixture in Andean Indians
The goal of the present report was to determine how well surnames assess the degree of European admixture in urban Aymara. Reflectances, which were measured at three wavelengths (425 nm, 545 nm, and 685 nm) and on two sites (the medial surface of the upper arm and the forehead), were used as genetic markers. The sample consisted of 556 Andean Indians of Aymara ancestry (305 males, 251 females; 10.0–29.9 yr) residing in La Paz, Bolivia (average al…
Total lung capacity in young highlanders of Aymara ancestry
Total lung capacity (TLC) and its components, including residual volume (RV) and vital capacity (VC), are described in a sample of 164 male and 143 female youths of Aymara ancestry (10.0–19.9 years) who were born and raised at high altitudes (> 2,500 m) and who were residing in La Paz, Bolivia (average altitude of about 3,600 m). The hypothesis was tested that the enhanced lung volumes of adult highlanders are attained during the period of growth…
Maximal aerobic power in trained youths at high altitude
The sample for this study consisted of 25 males and 19 females between the ages of 8.8 and 19.5 years. The subjects were healthy, well nourished and trained swimmers residing in La Paz, Bolivia (mean altitude 3700 m). The purpose of this study was to provide normative values for the work capacity of high-altitude youths. Mean VO2 max was 46.9 ml/kg/min in males and 39.3 ml/kg/min in females. VO2max increased significantly with age in males but no…
Anthropometric survey of high-altitude Bolivian porters
This paper presents the results of an anthropometric survey of 138 rural Aymaran high-altitude males who were working as porters in La Paz, Bolivia (3700 m). All subjects were measured for stature, weight, upper arm circumference, and triceps skinfolds. The body size and composition of the porters were then compared to an Aymaran rural population from the Bolivian highlands, and urban mestizo labourers from La Paz. The porters were smaller than t…
Work performance of high-altitude Aymara males
The sample for this study consisted of 28 Aymara males between the ages of 15 and 43 years. The subjects were rural high-altitude natives who were temporarily working as porters in La Paz, Bolivia (3700 m). Mean VO2max was 46 X 5 ml/kg/min. There was a significant negative relationship between VO2max and age in adult porters . However, there was also a significant positive relationship between maximal work output and age and a significant negativ…
The physical growth of urban children at high altitude
The physical growth of urban Aymara children residing in La Paz, Bolivia (3,600 m) is described and compared with Amerindian children residing at low and high altitudes and with low‐altitude U.S. children. The sample consists of 227 males (10.6–19.7 yr) and 219 females (11.2–19.8 yr). The urban La Paz children were taller at all ages than rural high altitude Amerindian children but similar in stature to urban high altitude children from Peru. The…
Effect of altitude on the physical growth of upper-class children of European ancestry
The physical growth of 351 upper-socioeconomic-status children (9-20 years) of European ancestry residing in La Paz, Bolivia (altitude 3600 m) is described and compared with that of lowland children of similar background. The purpose is to evaluate the independent effect of continual exposure to atmospheric hypoxia during the period of growth and development on linear growth. The data presented here indicate that the effect of hypoxia on achieved…
Maximal exercise capacity in adolescent European and Amerindian high‐altitude natives
Forty‐seven highland natives were given maximal exercise tests on a treadmill ergometer at 3,600 m. The subjects were grouped into four subsamples on the basis of ethnicity (European vs. Aymara) and age (young vs. old adolescent). Two‐way ANOVA indicated that VO 2 max adjusted for body size did not differ significantly between ethnic groups but was significantly larger in older than younger boys within each ethnic group (p 2 max's of highlanders …
Biological Anthropology
Growth Patterns of European and Amerindian High-Altitude Natives
Lung function of young Aymara highlanders
The patterns of development of FVC, FEV and %FEV are examined in 217 male and 195 female youths of Aymara ancestry residing in La Paz, Bolivia (altitude 3600 m). The data provide some evidence of an acceleration in the development of lung function relative to stature in Aymara children, beginning during early adolescence, and also indicate that there is a strong relationship between lung function and chest dimensions in Aymara children. Similar p…
Effect of altitude on the lung function of high altitude residents of European ancestry
The forced vital capacity (FVC), forced expiratory volume in one second (FEV), and ratio of FEV to FVC (%FEV) of 161 male and 158 female youths of European ancestry who were born at high altitudes and who were residing in La Paz, Bolivia (average altitude of 3,600 m) were examined and compared with those for lowland Europeans and highland Aymara Amerindians. FVC and FEV were significantly larger (p
Developmental responses to high‐altitude hypoxia in Bolivian children of European ancestry
The developmental adaptation hypothesis (DAH) proposes that highlanders adapt to their hypobaric hypoxic environment during growth and development. This report utilizes data on children (9.0-19.9 yr) of European ancestry residing in Santa Cruz and La Paz, Bolivia, to test selected aspects of the DAH. Previous tests of this hypothesis have been hampered by difficulties in controlling for socioeconomic and genetic influences. However, due to their …
Age of menarche in Bolivian girls of European and Aymara ancestry
Median age of menarche was determined in children of European and Aymara ancestry residing in La Paz, Bolivia (3600 m) and in children of European ancestry residing in Santa Cruz, Bolivia (400 m). Median age of menarche in European and Aymara highland natives was younger than reported by previous researchers, thus broadening the range of variation in age of menarche in high-altitude populations. Comparisons between La Paz and Santa Cruz European …
General/Theoretical Anthropology
Skin reflectance of children and young adults of Aymara ancestry
The skin reflectance of 556 Andean Indians of Aymara ancestry (305 males, 251 females; 10.0–29.9 yr) residing in La Paz, Bolivia (average altitude of about 3,600 m) is described. Reflectances were measured at three wavelengths (425 nm, 545 nm, and 685 nm) on two different sites, the medial surface of the upper arm and forehead. Males tended to be significantly darker than females on both the upper arm and forehead ( P P
Surnames as indicators of European admixture in Andean Indians
The goal of the present report was to determine how well surnames assess the degree of European admixture in urban Aymara. Reflectances, which were measured at three wavelengths (425 nm, 545 nm, and 685 nm) and on two sites (the medial surface of the upper arm and the forehead), were used as genetic markers. The sample consisted of 556 Andean Indians of Aymara ancestry (305 males, 251 females; 10.0–29.9 yr) residing in La Paz, Bolivia (average al…
Maximal aerobic power in high-altitude runners
Maximal aerobic power (VO2max) was assessed in seven male and one female middle- and long-distance recreational runners residing in La Paz, Bolivia (3600 m). All runners were born and raised at high altitudes (> 2500). Mean VO2max in the male runners was 60.8 ml/kg/min while VO2max in the female runner was 55.5 ml/kg/min. These values are higher than in any previously reported sample of either trained or untrained high-altitude natives. In additi…
Growth and health status of preschool Karen highlanders
The physical growth and health status of preschool (< 6 years) Karen highlanders belonging to the Pwo (212 males, 227 females) and Sgaw (107 males, 101 females) ethnic groups, and residing in northwest Thailand are described in the present report. The growth and health status of Thai tribal groups, including the Karen, is generally assumed to be substantially poorer than those of Thai lowlanders, who are primarily of Thai ancestry. However, the K…
Total lung capacity in Andean highlanders
Total lung capacity (TLC), residual volume (RV), and vital capacity (VC), as well as related measures of pulmonary function, were assessed in a sample of 39 male and 23 female native highlanders of Aymara ancestry (20.1–28.8 years) who were residing in La Paz, Bolivia (average altitude of about 3,600 m). After controlling for body and chest size, most measures of respiratory function were significantly larger in males than females ( P P
Total lung capacity in young highlanders of Aymara ancestry
Total lung capacity (TLC) and its components, including residual volume (RV) and vital capacity (VC), are described in a sample of 164 male and 143 female youths of Aymara ancestry (10.0–19.9 years) who were born and raised at high altitudes (> 2,500 m) and who were residing in La Paz, Bolivia (average altitude of about 3,600 m). The hypothesis was tested that the enhanced lung volumes of adult highlanders are attained during the period of growth…
Child health, nutrition, and physical activity
Dietary patterns and dietary adequacy of highland Pwo and Sgaw Karen of northwest Thailand
The present study compared the dietary patterns, dietary adequacy, and anthropometric indices of nutritional status of mothers and their weaned children during three measurement periods (post‐harvest, pre‐harvest, and harvest) between Pwo and Sgaw Karen Highlanders residing in northwest Thailand. Pwo mothers and their weaned children tended to have significantly less diverse diets than their Sgaw counterparts. As a result, the post‐harvest %RDIs …
Skin reflectance of lowland Bolivian youths of European ancestry
The skin reflectances of 257 Bolivian youths of European ancestry (140 males, 117 females; 9.0-19.9 yr) residing in Santa Cruz, Bolivia (average altitude of 400 m) are described. Reflectances were measured at three wavelengths (425 nm, 545 nm, and 685 nm) on two different sites, the medial surface of the inner upper arm and the forehead. Males tended to be darker than females, significantly on the inner upper arm (P .05). The results of compariso…
Seasonal variation in the dietary adequacy of highland Pwo and Sgaw Karen (Thailand)
The present report describes seasonal variability (postharvest, preharvest, harvest) in the dietary adequacy of highland Karen farmers (38 Pwo and 51 Sgaw mother-weaned child pairs) in Thailand. Both the Pwo and Sgaw exhibit little functionally significant seasonal variation in either energy or protein intakes, although there is significant seasonal variation in other nutrients. Sgaw Karen mothers and their weaned children had significantly highe…
Population growth and fertility patterns in an Old Order Amish settlement
There is some suggestion of fertility control by Amish families. However, this control appears to be independent of parity, suggesting that there is no intention to limit family size. It is therefore reasonable to conclude that the Amish in the Geauga Settlement are a natural fertility population
Birth Seasonality in the Old Order Amish
The Old Order Amish are a healthy and well-nourished natural fertility population, so that the timing of births is not influenced by behaviours to limit family size, undernutrition or disease. The present study examines the monthly distribution of 8160 births occurring between 1920 and 1991 in the Geauga Settlement in north-east Ohio, USA. The monthly distribution of births in the Geauga Settlement is bimodal, with a major peak extending from Aug…
Demography (21 obras) · Geography (18 obras) · Medicine (17 obras) · Sociology (13 obras) · Demography (11 obras) · High Altitude and Hypoxia (9 obras) · Internal Medicine (8 obras) · Mathematics (8 obras) · Anthropology (6 obras) · Biology (6 obras)