Earlier BMI rebound and lower pre-rebound BMI as risk of obesity among Japanese preschool children.

OBJECTIVES: Longitudinal growth data of children were analyzed to clarify the relationship between the timing of body mass index (BMI) rebound and obesity risk in later ages. SUBJECTS/METHODS: Of 54 558 children born between April 2004 and March 2005 and longitudinally measured in April and October every year in the preschool period, 15 255 children were analyzed wherein no longitudinal measurement is missing after 1 year of age. BMI rebound age was determined as the age with smallest BMI value across longitudinal individual data after 1 year of age. Rebound age was compared between overweight and non-overweight groups. The subjects were divided into groups based on the timing of rebound. The sex- and age-adjusted mean of the BMI, height and weight s.d. scores for age group, along with 6 months weight and height gain, were compared among groups using analysis of covariance. RESULTS: Among those who were overweight at 66-71 months of age, BMI rebound age obtained at approximately 3 years of age was compared with the non-overweight group, whose BMI rebound age was utmost 66 months or later (P<0.001). The comparison among BMI age group showed that earlier BMI rebound results in larger BMI (P<0.001) and larger weight and height gain after the rebound (P<0.001). Among the group with BMI rebound earlier than 30 months of age, low BMI was observed (P<0.001). Slight elevation of height and weight gain was observed before the BMI rebound among groups with rebound age earlier than 60 months of age (P<0.001). CONCLUSION: Earlier BMI rebound timing with pre-rebound low BMI leads to greater childhood obesity risk; hence, early detection and prevention is necessary for such cases.

Longitudinal changes in body mass index of children affected by the Great East Japan Earthquake.

BACKGROUND: The evacuation and disruption in housing caused by the 2011 Great East Japan Earthquake and following nuclear radiation may have influenced child health in many respects. However, studies regarding longitudinal childhood growth are limited. Therefore, in this study we aimed to explore the influence of the earthquake on longitudinal changes in body mass index in preschool children. METHODS: Participants were children from nursery schools who cooperated with the study in the Iwate, Miyagi and Fukushima prefectures. The exposed group consisted of children who experienced the earthquake during their preschool-age period (4-5 years old). The historical control group included children who were born 2 years earlier than the exposed children in the same prefectures. Trajectories regarding body mass index and prevalence of overweight/obesity were compared between the two groups using multilevel analysis. Differences in the changes in BMI between before and after the earthquake, and proportion of overweight/obesity was compared between the two groups. We also conducted subgroup analysis by defining children with specific personal disaster experiences within the exposed group. RESULTS: A total of 9722 children were included in the study. Children in the exposed group had higher body mass indices and a higher proportion of overweight after the earthquake than the control group. These differences were more obvious when confined to exposed children with specific personal disaster experiences. CONCLUSIONS: Children's growth and development-related health issues such as increased BMI after natural disasters should evoke great attention.

Gender differences in the association between maternal smoking during pregnancy and childhood growth trajectories: multilevel analysis.

OBJECTIVES: This study examines the gender differences in the association between maternal smoking during pregnancy and later growth in childhood. DESIGN: Ongoing prospective cohort study, which is called 'the Project Koshu', initiated in the foetal stage to the age of 9-10 years. SETTING: Koshu City which was in Japanese rural area. PARTICIPANTS: The study population comprised children born between 1 April 1991 and 31 March 1999 in Koshu City, Japan, and their mothers. Maternal smoking during early pregnancy was the exposure studied. MAIN OUTCOME MEASURES: Childhood body mass index (BMI) and BMI z-score trajectories of the children born to the smoking and non-smoking mothers by gender. Multilevel analysis that includes both individual and age as different-level variables was used for statistical analyses. RESULTS: The participating mothers delivered 1619 babies during the study period. Birth weight and anthropometric data were collected from 1603 (at birth, 99.0%), 1358 (at age 3, 83.9%), 1248 (at age 5, 77.1%), 1270 (at age 7-8, 78.4%) and 1274 (at age 9-10, 78.7%) of these children. The mean birth weight of both the male and female children whose mothers had smoked during pregnancy was significantly low compared with those born to non-smoking mothers (P < 0.01). However, the childhood BMI at each subsequent checkup age significantly increased only among the male children born to the smoking mothers. Moreover, this increase was continuously observed after 3 years of age. The results of BMI z-score analysis were also similar to these of BMI analysis. CONCLUSIONS: Smoking by pregnant women decreases the infant birth weight irrespective of gender but increases childhood weight gain especially by male children. The results might be valuable to explore the mechanism of fetal programming.

Association of incompleteness of the anterior part of the circle of Willis with the occurrence of lacunes in the basal ganglia.

BACKGROUND AND PURPOSE: This study investigated whether incompleteness of the anterior part of the circle of Willis affects the occurrence of lacunes in the basal ganglia. METHODS: One thousand and seventy-seven healthy individuals examined by magnetic resonance (MR) imaging and MR angiography were divided into eight subgroups according to our new classification. RESULTS: Logistic regression analysis demonstrated that healthy individuals with incompleteness of the anterior circle of Willis had significantly higher frequency of lacunes [odds ratio (OR): 2.121, 95% confidence interval (CI): 1.477-3.108; or OR: 2.46, 95% CI: 1.377-4.384 in cases without or with fetal type posterior communicating artery, respectively] and higher numbers of lacunes (P < 0.001 or P < 0.001 in cases without or with fetal type posterior communicating artery, respectively) compared to patients with complete circle of Willis. CONCLUSIONS: Incompleteness of the anterior part of the circle of Willis significantly affected the occurrence of lacunes.

Risk factors for the association of intracranial and aortic aneurysms.

This study investigated the association of intracranial aneurysms and abdominal aortic aneurysms to elucidate the incidence and independent risk factors for this association. Ultrasonography of the abdominal aorta was performed in 181 patients with 224 intracranial aneurysms. Six patients had suffered subarachnoid haemorrhage and the others had chronic disease or no symptoms. Magnetic resonance angiography was performed for confirmation if abdominal aortic aneurysm was identified by ultrasonography. Thirteen patients (7.2%) with 23 intracranial aneurysms had abdominal aortic aneurysms. Univariate analysis demonstrated that age (p < 0.01), size of intracranial aneurysms (p < 0.001), male sex (p < 0.01), multiplicity of intracranial aneurysms (p < 0.001), history of cerebrovascular diseases (p < 0.05), and current smoking (p < 0.0001) were significantly different between patients with and without this association. Multiple logistic analysis indicated that age (odds ratio [OR] 1.27, 95% confidence interval 1.08-1.48, p < 0.01), multiplicity (OR 22.1, 95% confidence interval 1.83-266.3, p = 0.01), size of intracranial aneurysms (OR 1.30, 95% confidence interval 1.10-0.54, p < 0.01), and current smoking (OR 33.3, 95% confidence interval 2.43-456.7, p = 0.01) were independent risk factors for the association. Patients with intracranial aneurysms who are older males with multiple or large intracranial aneurysms, and current smokers should be examined for abdominal aortic aneurysms using ultrasonography.

Associations between retrospectively recalled napping behavior and later development of Alzheimer's disease: association with APOE genotypes.

To evaluate putative risk factors for Alzheimer's disease (AD), we conducted a case-control study with exposure assessment performed after disease onset. In this study, we evaluated the effect of recalled habitual napping according to its duration and examined whether APOE genotype modifies the effect. The subjects were 337 patients (144 men, 193 women, age at onset and the time of study (years): 69+/-10, 73+/-9) with a diagnosis of probable AD based on the NINCDS-ADRDA criteria. Two hundred and sixty spouses of the subjects (94 men, 166 women, age at the time of study: 69+/-9) served as controls. We asked retrospectively about habitual (3 or more days per week) napping and its duration observed between 5 and 10 years before the onset of AD for cases, and between 5 and 10 years before the time of the study for controls. The analysis revealed that limited napping for up to 60 min had an apparently protective effect against the development of AD, especially for carriers of the APOEepsilon 4 allele. By contrast, napping for more than 60 min increased the risk of AD morbidity among the carriers of the allele. Habitual napping may modulate or disturb the physiological functions of sleep and circadian time-keeping according to its duration, and this might be associated with some mechanism that leads to the development of AD.

Prevalence of dementia and distribution of ApoE alleles in Japanese centenarians: an almost-complete survey in Yamanashi Prefecture, Japan.

OBJECTIVE: To determine the prevalence and types of dementia in centenarians and to examine whether the ApoE epsilon 4 allele has significant impact on the development of Alzheimer's disease (AD) in the population. DESIGN: Cross-sectional study and a 6-month prospective study. SETTING: Yamanashi Prefecture, Japan. PARTICIPANTS: Forty-seven centenarians participated in the study to determine the prevalence and types of dementia. Thirty-three of the 47 participated in the study of ApoE genotyping. As controls, 224 demented older adults participated in the genetic study. Their age at onset was < 90 years. OUTCOMES: Prevalence of dementia based on DSM-III-R; types of dementia based on NINCDS-ADRDA and ICD-10; distribution on ApoE alleles in the centenarians and in the controls; and the 6-month mortality rate of the subjects. MAIN RESULTS: Of 47 centenarians, 70.2% had dementia, and AD accounted for the majority (75.8%) of the dementia cases. The distribution of ApoE alleles in all the subjects and the AD subjects was epsilon 2: 4.6% vs. 0%; epsilon 3: 90.1% vs. 94.1%; epsilon 4: 4.6% vs. 5.9%. The frequency of the epsilon 4 allele in the AD patients showed a tendency to decrease with increasing age, ranging from 38% for those with an age at onset of < 60 years to 22% for those with an age at onset of ranging from 80 to 89 years. The 6-month mortality rate was 27% (9/33) for the demented centenarians, whereas none of the 14 nondemented centenarians died. CONCLUSION: This almost-complete survey, conducted in a prefecture of Japan, revealed a high prevalence of dementia in centenarians. The ApoE epsilon 4 allele does not have an impact on the development of AD in centenarians.

Elevated chromosome aberration frequency after X-ray exposure of cultured fibroblasts derived from patients with porokeratosis.

Porokeratosis (PK) is a rare genetic skin disorder inherited as an autosomal dominant trait and regarded as a disease predisposing to cancer. To evaluate chromosomal radiosensitivity of PK cells, we examined chromosome aberration frequency after X-irradiation of cultured skin fibroblasts derived from PK patients and controls. Without X-ray exposure, frequencies of chromosome-type aberrations (exchanges or deletions) were not different between the patients and controls. Following X-ray irradiation, frequencies of deletions in the patient group were significantly increased, whereas those of exchanges were not elevated. No differences in chromatid-type aberration frequency were found between the patients and controls with or without exposure to X-ray. The observed radiosensitivity, though not as high as in ataxia telangiectasia (AT) cells, agrees well with the previously reported higher radiosensitivity of PK fibroblasts in survival analysis.

Mitomycin-C-induced sister-chromatid exchanges and cell-cycle kinetics in lymphocytes from patients with Klinefelter syndrome.

The chromosomal sensitivity to mitomycin-C (MMC) and cell-cycle kinetics in cells from patients with Klinefelter syndrome, a sex chromosomal disorder giving a high risk of malignant tumor, were studied by techniques of sister-chromatid exchanges (SCEs). The frequencies of MMC-induced SCEs increased in proportion to the increase in MMC concentration in both patient and normal control cells. At low levels of MMC there were no significant differences in SCE frequencies between the patient and normal control cells, but at MMC concentrations of 3 X 10(-8) M (p less than 0.05) and 1 X 10(-7) M (p less than 0.01), significant increases in the frequency of MMC-induced SCEs were observed in cells from patients compared to cells from normal controls. Although the analysis of cell-cycle kinetics both after various culture times and after treatment with MMC revealed that there were no significant differences between the patient and normal control cells, patients with Klinefelter syndrome showed a tendency to cell-cycle delays after treatment with MMC in comparison with normal controls.

The effect of aging on cell-cycle kinetics and X-ray-induced chromosome aberrations in cultured lymphocytes from patients with Down syndrome.

To evaluate the effects of aging on cytogenetic characteristics of lymphocytes from Down syndrome (DS), cell-cycle kinetics after PHA stimulation and chromosome-type aberration frequencies after X-ray exposure were investigated in vitro in the lymphocytes derived from 4 (or 3 for X-ray treatment) age groups of DS patients and age-matched controls. The results clearly showed higher mitotic and proliferation index levels in younger groups compared to older groups at the various culture intervals, whether the lymphocytes were from the DS patients or controls. The age-related changes of the proliferation index were mainly attributed to a delayed response to PHA as age increased. The changes of PHA responses seemed to be particularly marked during adolescence. Nonetheless, no significant differences were observed between the DS patients and age-matched controls for each age group. In all age groups, frequencies of both chromosome-type exchanges and deletions were elevated in the DS patients by about 1.3 times in comparison with the controls. The magnitude of radiosensitivity, however, seemed to decrease slightly in the 40-49-year group. To our knowledge, the present study is the first report in the literature to deal with the effect of aging on the greater radiosensitivity of DS lymphocytes.

[Effect of vitamin D receptor gene polymorphism and lifestyle on bone mineral density and bone mineral density decrement rate].

The effects of genetic and environmental factors on bone mineral density (BMD) were investigated in 108 healthy Japanese women. Of the 108 subjects, BMD (from the second to forth lumbar vertebrae) was measured in 1992 in 103, in 1993 in 100, and in both years in 95 by dual energy X-ray absorptiometry. Vitamin D receptor (VDR) gene polymorphism in intron 8 was used as a genetic marker. Information on menstruation, health status, lifestyle, quantities of nutrient intake and frequencies of food intake was obtained by questionnaire. The frequency of allele B (825bp), whose polymerase chain reaction (PCR) products cannot be cut with BsmI, was 0.259 and the frequency of allele b (650bp), whose PCR products can be cut with BsmI, was 0.741. The subjects in our study obeyed the Hardy-Weinberg law. While the frequency of allele B was 0.448 in European whites as reported by Morrison et al, it was 0.259 in our Japanese subjects, suggesting a racial difference. Z score values (average value 0, standard deviation 1) increased in the order BB, Bb and bb. This result indicates that allele B is associated with the lower BMD in Japanese, as in European whites. The BMD decrement rate increased in the order bb, Bb and BB, indicating that VDR gene polymorphism may be a regulatory factor for losing BMD. Most of lifestyle variables, calcium intake and vitamin D intake were not correlated with BMD, but the food frequency score (which was defined as values weighted in each of three food categories obtained by factor analysis) was significantly correlated with BMD. Multiple regression analysis showed significant influences of years after menopause, the food frequency score and VDR genotype on BMD. VDR genotype and years after menopause influenced the BMD decrement rate significantly in multiple regression analysis. Neither a relationship between BMD and calcium intake nor between BMD and vitamin D intake by VDR genotype was found. These results suggest that the VDR gene is a genetic factor in BMD and the BMD decrement rate in Japanese.

[Effects of pepsinogen C gene polymorphisms on serum pepsinogen I and serum pepsinogen II levels].

Recently pepsinogens have been considered to be effective markers of terminal differentiation of stomach mucosa, and also good markers of preneoplastic and neoplastic changes of the stomach mucosa. Not a few studies concerning polymorphisms of pepsinogen A and C genes have been reported, however, as far as the authors are aware, no study was performed as to the relation between polymorphisms and serum pepsinogen I and II levels. Polymorphisms of the pepsinogen C (PGC) gene were identified by PCR, which amplifies DNA in the region within the intron between exon 7 and exon 8, and 6% polyacrylamide gel (no urea) electrophoresis. Six alleles were observed in the Japanese population. Frequencies for these alleles in 221 unrelated Japanese individuals were 0.077, 0.036, 0.328, 0.240, 0.009 and 0.310, respectively. The association between the PGC genotype and serum pepsinogen was investigated. A higher serum pepsinogen II level was observed in individuals homozygous for allele 6 than in those with other genotypes. This result indicates that careful attention should be paid to the genetic background of serum pepsinogen in screening of stomach cancer by this method.

[Distribution of genotypes of alcohol dehydrogenase 2 and aldehyde dehydrogenase 2 in Japanese twin children].

OBJECTIVE: In order to prevent alcohol related deseases, this study investigated the distribution of the genes controlling alcohol metabolism in Japan's twin. METHODS: Restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR) technique was used to measure the control gene of alcohol metabolized enzymes and the genotypes of alcohol dehydrogenase 2 (ADH2) and aldehyde dehydrogenase 2 (ALDH2), which were distributed in Japan's twins. At the same time, according to the difference in genotypes, the sensitive individuals were screened from the study subjects. RESULTS: The distribution of ADH2 and ALDH2 genes were consistent with the Hardy-weinberg equation. The three genotypes of ADH2 gene were ADH2(1)/ADH2(1) (1.1%), ADH2(1)/ADH2(2) (44.6%) and ADH2(2)/ADH2(2) (54.3%). And those of ALDH2 gene were ALDH2(1)/ALDH2(1) (41.3%), ALDH2(1)/ALDH2(2) (39.1%) and ALDH2(2)/ALDH2(2) (19.6%). The frequency of ADH2 and ALDH2 genes was 0.255, 0.745 and 0.609, 0.391 respectively. CONCLUSION: Not only the distribution of genotypes of ADH2 and ALDH2 is known, but also the sensitive individuals are found, which can help prevent alcohol related disease.

[Study on the association between risk factors for osteoporosis and bone mineral density].

The relationship between bone mineral density (BMD) and risk factors for osteoporosis was investigated on 146 females (23-68 years old) in Enzan city, Yamanashi prefecture. BMD was measured by DEXA (Dual Energy X-ray Absorptiometry) method. Information regarding menstruation, health status, life-style, quantities of nutrient intake and frequencies of food intake were obtained by questionnaire. Fitness level was determined by exercise test and daily energy expenditure by calorie-counter. The results were as follows; 1) No relationship between physical activities or daily energy consumption and BMD was found. 2) No relationship between calcium intake or vitamin D intake and BMD was found, but a significant and positive correlation coefficient between intake frequency of milk products and BMD was observed. 3) Significant influences of age, BMI, presence of lumbago and food frequency score on BMD were indicated by multiple regression analysis. Food frequency score were defined as values weighted in each of three food category, obtained by factor analysis. 4) Significant influences of height decrement rate per year and number of years postmenopausal on BMD reduction rate per year were indicated by multiple regression analysis. These results suggest that these significant factors are useful in indications of risk for osteoporosis.

[Association of cytochrome P-450 1A1 (CYP1A1) gene polymorphism to smoking status and hematologic findings].

Measures to control smoking are important in the field of preventive medicine. In order to clarify differences in susceptibility in individuals to lung cancer of genotypes of CYP1A1, which are considered to be related to lung carcinogenesis were evaluated in 391 healthy males to study relationship to smoking status and hematological findings. No correlation was observed between genotypes of CYP1A1 and smoking status. White blood cell counts in smokers with a Val allele were significantly higher than in those without a Val allele. Multiple regression analysis showed that the genotype of CYP1A1 and daily cigarette consumption had significant relationship with white blood cell count in smokers. However, red blood cell count, hemoglobin, hematocrit, MCV, MCH, or MCHC were not significantly associated with genotype of CYP1A1. There have been no previous reports on the relationship between the genotype of CYP1A1 and hematological findings. In consideration of the epidemiologic findings that many individuals with increased white blood cell counts have cancer or cardiac diseases, and reports that the increase in the white blood count was associated with poor respiratory function, white blood cell count may be candidate to for being a risk marker and thus contribute to prevention of these diseases.

[A study of the relation between providing healthcare information and behavior changes of people in Japan. Parental behavior changes after receiving information about the sudden infant death syndrome].

OBJECTIVE: Considering the lack of evidence concerning the relationship between providing healthcare information and behavior of people in Japan, we utilized a questionnaire to survey the parents of infants to evaluate behavior change after receiving information about the Sudden Infant Death Syndrome (SIDS). METHODS: A questionnaire about SIDS information was administered in 234 municipalities in Niigata, Gifu, Shizuoka, and Hiroshima Prefectures and in Yokohama City in November and December of 1999 to 14,879 parents who visited for the 18-month health examination of their children. The questionnaire did not ask for the participants' names. Logistic regression analysis was used to study the connection between behavior change and SIDS information sources. RESULTS: 10,900 parents returned the questionnaire to give a 73.3% response rate, 19.0% of these receiving information about SIDS risk factors from hospitals or clinics, 3.7% from public health centers, and 9.2% from their friends. More received information from the mass media such as TV programs, which provided the main source for 71.1% of the parents. The degree of behavior change was evaluated after adjustment for variables concerning a variety of information sources and other appropriate factors such as the age and sex of parents and the number of their children. We found that receiving information from hospitals or clinics significantly influences behavior changes for all kinds of risk factors. Information from public health centers, baby-care groups, and friends influenced behavior changes relevant to the risk factors for feeding methods, sleeping position, and parents' smoking. There was no relation between receiving information from the mass media and behavior change of parents. CONCLUSIONS: The mass media provide far more information than do medical facilities, public health centers, baby-care groups and personal contacts but the latter played much more effective roles in making parents change their baby care behavior. These results point to an obvious discrepancy between efficiency in providing information and the degree of behavior change elicited. We should thus take the source of information and the target population into consideration when we examine the best way to provide healthcare information for people in the future.

Musculoskeletal disorders among hospital nurses in rural Japan.

INTRODUCTION: Although musculoskeletal disorders (MSD) represent a significant occupational problem for hospital nurses, few investigations target nurses in rural facilities. This study investigated the prevalence and correlates of MSD among nurses within an affiliated hospital conglomerate of rural Japan. METHODS: A self-reporting survey was used as diagnostic tool; the reliability, validity and cost-effectiveness of this method has been established. RESULTS: An initial group of 329 nurses was recruited from three affiliated, rural locations in Yamanashi prefecture, central Japan; 247 usable replies were obtained (final response rate: 75.1%). The 12-month period-prevalence of self-reported MSD at any body site was 91.9% (95% CI 87.8-94.7). Low back pain (LBP) was the most commonly reported MSD with a prevalence of 82.6% (95% CI 77.4-86.8). Next most reported were shoulder (61.1%, 95% CI 54.9-67.0), neck (36.8%, 95% CI 31.1-43.0), upper back (29.1%, 95% CI 23.8-35.1), knee (23.5%, 95% CI 18.6-29.1) and upper leg MSD (19.4%, 95% CI 15.0-24.8). MSD of the wrist (14.2%, 95% CI 10.4-19.1), upper arm (13.0%, 95% CI 9.3 -17.7) and lower arm (11.7% 95% CI 8.3-16.4) were less common. Logistic regression indicated that nurses who were regularly involved in the manual handling of patients had an increased LBP risk of 16.7 (OR 16.7, 95% CI 1.3-412.7, p = 0.0340) when compared with nurses who were not involved in manual handling of patients. CONCLUSION: Overall, our study indicated that MSD is common among rural Japanese nurses and its prevalence is consistent between related facilities. The excessive amount of LBP, however, suggests that Japanese nurses are at higher risk of this condition compared with their foreign counterparts.

[Structural quantification of bone from radiographs using power spectral analysis].

Bone mineral density (BMD) and bone structure are very important indices for prevention of fracture. However, it is very difficult to quantify bone structure, and only a few indices for structural quantification of bone have been reported. The purpose of this research was to investigate a new index for bone structure. The subjects were 52 women aged from 20 to 85 years. Directivity index (DI) is a new index of bone structure calculated by directivity of power spectrum from radiographs of metacarpal bone using fast Fourier transform (FFT). DI was obtained by subtracting the integral power value at 0 and 90 degree directions on the x-y plane of the two-dimensional power spectrum of bone from the integral power value at a direction of 45 degrees. A significant relationship between BMD and DI was indicated by correlation coefficient. However, no significant relationship between BMD and the first moment of the Fourier power spectrum or the fractal dimension was found. There is a possibility that DI estimates a slight deformation of bone structure. In the future, we will apply DI to the prevention of fractures and osteoarthritis.

[Sex differences in subjective well-being and related factors in elderly people in the community aged 75 and over].

Sex differences in factors related to subjective well-being were evaluated in people in their late old age by interviewing individuals aged 75 years and over living in 2 regions of Enzan City, Yamanashi Prefecture. The 17-item revised "Philadelphia Geriatric Center (PGC) Morale Scale" was used for evaluation of subjective well-being. Factors related to family status, employment, health related factors, activities of daily living, and results of physical examinations were each classified into two or more categories, and PGC Morale Scale points were compared among the categories for all subjects and separately for males and females using the Mann-Whitney test and the Kruskal-Wallis test. 1) Although the mean age of males (80.0 +/- 4.4 years) and females (80.4 +/- 4.3 years) was no significantly difference, PGC Morale Scale points were significantly higher in males than in females (p < 0.05), indicating a sex difference in subjective well-being. 2) In elderly females, subjective well-being was related to many factors, and there was a particularly strong relationship between subjective well-being and both health related factors and activities of daily living. 3) In elderly males, the factors related to subjective well-being were fewer than in females, consisting only of "social opportunities", "hobbies", and "grip strength". Since factors related to subjective well-being differ between the sexes, these differences must be taken into account when evaluating subjective QOL of the elderly.