Effect Of Different Periods Research Articles

Effect of Different Periods of Traffic Noise Exposure on Epinephrine, Norepinephrine and Corticosterone Serum Level Changes in Male Rat

Background and Objectives: Traffic noise, as one of the noise types, is a widespread feature of the urban environments. Traffic noise exposure can lead to hearing loss, hypertension, obesity and ischemic heart diseases. Stress also has many physiological effects on the hormonal and neural function. Therefore, this study was designed to evaluate different periods of traffic noise effects on the levels of adrenal stress hormones in male rats. Methods: 48 male wistar rats were used in this study. They divided randomly into 6 groups; the control, short term (1 day) and long term (7, 14, 21 and 28 days) groups. Traffic sound was recorded, adjusted and played (86 dB) for animals. At the end of experiment, the animals were anesthetized and blood sample was drawn. Levels of epinephrine, norepinephrine and corticosterone were measured. Statistical analysis was done by one-way analysis of variances and Tukey’s post hoc test. Results: Findings showed that in the 1 day group, epinephrine level decreased and in the 21 days group significantly increased. Levels of norepinephrine showed significant increase in the 14, 21 and 28 groups. In the same way, concentration of corticosterone significantly increased with increase of traffic noise time. Conclusion: It seems that traffic noise exposure led to decrease of epinephrine plasma concentration in the short term while it increased all of 3 hormones in the long term. It may be due to hormonal structure, half time and stress period.

VOLATILE FATTY ACIDS (VFA) DAN AMONIA (NH3) LITTER FERMENTASI DENGAN LAMA PERAM YANG BERBEDA SECARA IN VITRO

The aim of this study was to examine the effect of different periods of fermentation of chicken litter on in vitro volatile fatty acids (VFA) and ammonia (NH3) concentrations. This study used a completely randomized design (CRD) with 4 treatments and 4 replications. The treatments tested were T0 = fermentation 0 weeks, T1 = fermentation 3 weeks, T2 = fermentation 6 weeks and T3 = fermentation 9 weeks. The parameters observed in the study were the concentration of VFA and NH3 fermentation litter. The results showed that the concentration of VFA and NH3 was not significantly affected by the length of ripening, with the average value concentration of VFA total fermented litter ranging from 70 – 85 mM while the concentration of NH3 in the fermented litter was 18,84 – 23,28 mg/100 ml. The conclusion of the study was that different fermentation times did not affect the concentration of total VFA and NH3 concentrations.

Germination of palm seeds under periods of rehydration

Abstract Palm seeds are indicative of being recalcitrant species. Seeds germination for many species, is slow and uneven, even in favorable conditions, often due to the resistance of the woody endocarp that makes them impermeable to water. Most species also have the characteristic of not tolerating the drying process at low moisture levels, thus losing their viability. In view of these considerations, the objective was to evaluate the effect of different periods of rehydration on the germinative process of seeds of royal palm, dwarf palm and jeriva. Seeds were homogenized and immersed in water containing 3 times their volume, with daily replacement. The experimental design used was completely randomized, with 5 treatments (0, 3, 6, 9, and 12 days of rehydration), with 4 replications of 25 seeds. The seeds were placed in transparent “gerbox” plastic boxes containing medium vermiculite as substrate and placed in BOD with a photoperiod of 16-hour of light and their respective optimum temperatures for each species. The number of germinated seeds was counted every 2 days until germination stabilized. The variables analyzed were germination percentage, germination speed index (GSI), average germination time (AGT) and distribution of germination over the days. Rehydration for 3 days increased the germination rate of royal palm seeds. For dwarf and jeriva species, rehydration did not influence the analyzed variables. The GSI and AGT were negatively influenced by the rehydration periods for royal palm. Rehydration prolonged the peak of germination of the studied species.

Climate change affects the parasitism rate and impairs the regulation of genes related to oxidative stress and ionoregulation of Colossoma macropomum

Global climate change represents a critical threat to the environment since it influences organismic interactions, such as the host-parasite systems, mainly in ectotherms including fishes. Rising temperature and CO2 are predicted to affect this interaction other and critical physiological processes in fish. Herein, we investigated the effects of different periods of exposure to climate change scenarios and to two degrees of parasitism by monogeneans in the host-parasite interaction, as well as the antioxidant and ionoregulatory responses of tambaqui (Colossoma macropomum), an important species in South American fishing and aquaculture. We hypothesized that temperature and CO2 changes in combination with parasite infection would interfere with the host’s physiological processes that are related to oxidative stress and ionoregulation. We experimentally exposed C. macropomum to low and high levels of parasitism in the current and extreme climate scenarios (4.5 °C and 900 ppm CO2 above current levels) for periods of seven and thirty days and we use as analyzed factors; the exposure time, the climate scenario and parasitism level in a 2 × 2 × 2 factorial through a three-way ANOVA as being fish the experimental unit (n = 8). An analysis of gill enzymatic and gene expression profile was performed to assess physiological (SOD, GPx and Na+/K+-ATPase enzymes) and molecular (Nrf2, SOD1, HIF-1α and NKA α1a genes) responses. A clear difference in the parasitism levels of individuals exposed to the extreme climate scenario was observed with a rapid and aggressive increase that was higher after 7 days of exposure though showed a decrease after 30 days. The combination of exposure to the extreme climate change scenario and parasitism caused oxidative stress and osmoregulatory disturbance, which was observed through the analysis of gene expression (Nrf2, SOD1, HIF-1α and NKA α1a) and antioxidant and ionoregulatory enzymes (SOD, GPx and Na+/K+-ATPase) on the host, possibly linked to inflammatory processes caused by the high degree of parasitism. In the coming years, these conditions may result in losses of performance for this species, and as such will represent ecological damage and economical losses, and result in a possible vulnerability in relation to food security.

Composición fisicoquímica, rendimiento y aceptación sensorial del queso fresco Coalho obtenido a partir de leche de vaca cebú

The aims were to evaluate the effect of breed on the genetic polymorphism kappa-casein, physicochemical composition of milk and Coalho cheese, and on cheese yield; and to evaluate the effect of different periods of storage on sensorial acceptance of the Coalho cheese obtained from milk of Guzerat, Gyr and Sindi cows. Twenty (20) cows of Zebu breeds were selected, from which it was obtained the frequency values of the genetic polymorphism kappa-casein. Milk were submitted to fat, protein, lactose, non-fat solids and total solids, electrical conductivity analysis and somatic cell count. Cheeses were submitted to fat, protein, total solids, pH, moisture and yield (g TS/L) analysis. Attributes appearance, aroma, texture and flavor were judged at the 1st, 25th and 46th day of storage. There was a total frequency of 0.70 for genotype AA, 0.30 for genotype AB. There was no significant difference in milk composition among the studied breeds. However, there were differences in the physicochemical composition (with the exception of the protein) and the yield of the cheeses, but all the breeds showed a similar real yield. It was found effect of the storage period on the cheeses sensory attributes in the different breeds, with the exception of the appearance. The milk of the Guzerat, Gyr and Sindi breeds constitute an excellent raw material for the production of curd cheese and ensures a satisfactory sensorial acceptance of the product at the 1st, 25th and 46th days of storage.

Comparative study of gut microbiota from captive and confiscated-rescued wild pangolins

Pangolins are among the most critically endangered animals due to widespread poaching and worldwide trafficking. Captive breeding is considered to be one way to protect them and increase the sizes of their populations. However, comparative studies of captive and wild pangolins in the context of gut microbiota are rare. Here, the gut microbiome of captive and confiscated-rescued wild pangolins is compared, and the effects of different periods of captivity and captivity with and without antibiotic treatment are considered. We show that different diets and periods of captivity, as well as the application of antibiotic therapy, can alter gut community composition and abundance in pangolins. Compared to wild pangolins, captive pangolins have an increased capacity for chitin and cellulose/hemicellulose degradation, fatty acid metabolism, and short-chain fatty acid synthesis, but a reduced ability to metabolize exogenous substances. In addition to increasing the ability of the gut microbiota to metabolize nutrients in captivity, captive breeding imposes some risks for survival by resulting in a greater abundance of antibiotic resistance genes and virulence factors in captive pangolins than in wild pangolins. Our study is important for the development of guidelines for pangolin conservation, including health assessment, disease prevention, and rehabilitation of wild pangolin populations.

Effect of different periods of irrigation on growth and yield of Cenchrus ciliaris at semi-arid zone of North Darfur State, Sudan

Buffel grass Cenchrus ciliaris L. (Poaceae) is recognized as one of Australia's most serious environmental weeds. This introduced grass has been associated with loss of native species and alteration of fire regimes. However, it is also highly valued as a pasture species for arid and semi-arid zones and its weed status is highly controversial. This study was conducted at the private farm, Southern part of Alfashir Airport, North Darfur State, Sudan. The objective was to evaluate the effect of different periods of irrigation (DPI) on growth and forage yield of Cenchrus ciliaris during years of 2018 and 2019. The experiment was laid-out in a randomized complete block design (RCBD) with four replicates, the plot size was 8x5 m. Data collected included plant density, plant ground cover, plant height and dry matter yield. DPI showed significant effect on plant density, plant ground cover, Plant height and dry matter yield. The study showed that irrigation every 7 days (Ir1) was suitable for buffel grass at semi-arid zone in Sudan. Quantitative studies are needed to determine its ecological effects.

Effect of different periods of irrigation on growth and yield of Cenchrus ciliaris at semi-arid zone of North Darfur State, Sudan

Effect of different periods of irrigation on growth and yield of Cenchrus ciliaris at semi-arid zone of North Darfur State, Sudan

Adaptive calendar effects and volume of extra returns in the cryptocurrency market

PurposeThis study broadly attempts to explore adaptive or dynamics patterns of calendar effects existed in the cryptocurrency market as per the adaptive market hypothesis (AMH) framework. Another agendum of this study is to investigate the quantum of extra returns which may result from the presence of calendar effects.Design/methodology/approachThe present study considers both parametric and non-parametric approaches to verify calendar effects empirically. Specifically, this study has implemented Generalised Autoregressive Conditional Heteroscedasticity (1, 1) and Kruskal–Wallis tests in the rolling window approach to reveal adaptive patterns of calendar effects. Additionally, the present study has used the implied trading strategy to evaluate the volume of excess returns resulted from calendar effects than buy-and-hold (BH) strategy.FindingsThe overall results of the current study exhibit that calendar effect in the cryptocurrency market is dynamic rather than static which indicates the calendar effect is a time-varying phenomenon. Moreover, this study also confirmed that ITS is not suitable to obtain extra returns despite the existence of calendar effects.Research limitations/implicationsThe present study has covered some broad aspects of calendar anomalies in the cryptocurrency market, keeping aside certain other limitations which need to be addressed in the following dimensions. Future studies may aim at addressing issues like, Turn-of-the-Year effect, Halloween effect, weather effect, and Month-of-the-Year effects, and try to explore the reasons of presence of dynamic patterns of calendar effects.Practical implicationsThe significant implication of this study is that it alerts investors about market return predictability due to calendar patterns or effects in different periods. It also suggests the period in which the ITS can perform better than the BH strategy.Originality/valueIt is the first study in the cryptocurrency literature which has adopted the AMH framework to verify adaptive calendar effects or anomalies. Furthermore, this study, instead of a mere examination of the presence of calendar effects, has evaluated the potential of calendar effects to produce extra returns through trading strategies.

The Role of Creative Publicity in Different Periods of the COVID-19 Outbreak in China: Taking the Creative Publicity of Chinese Poetry as an Example

When humans are confronted with an epidemic situation or a continuous natural disaster, success depends largely on how critical information is conveyed to as many people as possible, how individuals' emotional experiences of the crisis are elicited, and how their behaviors are directed going forward. Efficient publicity is key to successful epidemic prevention and control. This study explores the role of creative publicity by comparing the influence of creative publicity and general publicity in different periods of the COVID-19 outbreak in China. The effects of creative and general publicity differed across varying periods of the COVID-19 outbreak. Specifically, compared to general publicity, creative publicity had a significant impact on individuals' emotional arousal in the early period of the COVID-19 outbreak while it significantly promoted individuals' emotional arousal, behavioral regulation, and willingness to actively disseminate information in the middle period. In the stable period of the COVID-19 outbreak, creative publicity performed better than general publicity in regulating individuals' behavior. On the other hand, general publicity was more effective than creative publicity in regulating individuals' behavior and actively disseminating information about the epidemic in the early period of the COVID-19 outbreak. In conclusion, creative and general publicity had differing effects in different periods of the COVID-19 outbreak, which may relate to the characteristics of the publicity format and people's psychological conditions in different periods of the COVID-19 outbreak.

Preliminary Education，Vocational Training and Migrant Workers’ Income：Based on the Perspective of Life Cycle

Since the reform and opening up, migrant workers have made significant contributions to China’s economic growth, not only promoting the process of industrialization and urbanization, but also broadening the source of rural household income, which has become an important way to alleviate poverty. However, due to limited human capital and household registration discrimination, migrant workers are in a long-term disadvantaged position in the urban labor market, resulting in low income level. Therefore, it has theoretical significance and policy value to study how preliminary education and vocational training affect migrant workers’ income and income inequality.The existing literature on the comparative study of preliminary education and vocational training is insufficient, and only focuses on one aspect of short-term or long-term, which cannot reveal their heterogeneous effects in different periods. In addition, the research on the impact of preliminary education and vocational training on income inequality is also insufficient. With the transformation of China’s main contradictions, income inequality is often more worthy of study than income itself. Based on the data of Rural Fixed Observation Points from 2011 to 2014, this paper studies the heterogeneous effects of basic education and vocational training on migrant workers’ income from the perspective of life cycle. Then, this paper analyzes the heterogeneity effects from the dimensions of employment mode, industry and location, and discusses how they affect the income inequality. The conclusions are that: （1）Compared with preliminary education, vocational training has a greater positive impact on the income of migrant workers, which is not only reflected in the short-term “immediate effect”, but also in the “long-term effect” based on the life cycle. Specifically speaking, migrant workers who have participated in vocational training can not only obtain 18.3% income increase in the early stage of entering the labor market, but also obtain 0.3% annual relative income increase compared with those without vocational training, while the corresponding values of basic education are 13.1% and 0.1%.（2）These effects are heterogeneous in different types of employment, industries and places of employment.（3）Basic education and vocational training can not only improve the income of migrant workers, but also reduce the income inequality in rural areas, and the effectiveness of vocational training is greater.Based on the conclusion, this paper holds the points that we should take the issue of migrant workers’ income as a starting point to deepen economic reform, regard basic education and vocational training as two complementary methods, and take the types of employment, industry and place of employment as the three directions of policy refinement, so as to improve the level of migrant workers’ human capital and income, and promote high-quality economic and social development.

Supplementing flaxseed oil for long periods improved carcass quality and breast fatty acid profile in Japanese quail

The efficient time for supplementing flaxseed oil to meat-type quail to produce n-3 fatty acid fortified meat has not been determined. This study was conducted to find out the effects of different periods of flaxseed oil supplementation in the Japanese quail diet on the subsequent growth performance, carcass characteristics, fatty acids profile of breast, and functional properties of the Japanese quail meat. Totally, 720 one-day-old Japanese quail were studied in a 35-day experiment using a completely randomized design. Substituting sunflower oil with flaxseed oil had no significant effect on weight gain and feed intake in Japanese quails. Supplementing flaxseed oil for the whole 35-day growth period significantly reduced abdominal fat proportion. Flaxseed oil addition to the quail diet just a week before slaughter resulted in a 4.97-fold increase in the n-3 fatty acid content of the breast muscle. Feeding flaxseed oil decreased the activity of delta-9-desaturase in quail's breast compared to sunflower oil. The greatest thrombogenic index observed in the breast meat from control while consumption of flaxseed oil significantly decreased the thrombogenic index. Supplementing flaxseed oil to quail's diet for 21 and 35 days before slaughter significantly increased breast malondialdehyde content. Feeding flaxseed oil for long periods had no significant impact on the breast meat pH while water holding capacity was decreased. The breast lightness was increased when the flaxseed oil was fed for longer periods. Generally, feeding flaxseed oil in the last week of the growth period improved the feed conversion ratio and the fatty acid profile of quail breast meat with the minimum deterioration effects on meat quality characteristics.

Seed germination in Narcissus yepesii (Amaryllidaceae): clinal variation in the morphophysiological dormancy levels.

Seed dormancy classes determine both population and species-level processes which can be crucial in the life cycle of many plants. However, there are no studies of a dormancy cline between levels of morphophysiological dormancy (MPD). We aimed to determine the class of seed dormancy of Narcissus yepesii exhibits in order to explore links between different dormancy levels, previously characterized in two closely related phylogenetic congeners, N. alcaracensis and N. longispathus. Experiments were carried out under both near-natural temperature and controlled laboratory conditions. The parameters calculated were mean embryo length, radicle and shoot emergence percentages. The effects of different periods of storage; and different periods with or without GA3 of warm, cold or warm plus cold were analysed. The Narcissus populations from the Baetic System of mountain ranges in south-eastern Spain show clinal variation in a northeast–southwest gradient from intermediate to non-deep complex MPD, through the coexistence of intermediate and non-deep complex MPD in N. yepesii (21 % and 74 %, respectively). In addition, 54 % of stored seeds were able to show both levels of MPD. Narcissus yepesii occupies an intermediate position between N. alcaracensis and N. longispathus in the geographical distribution and in the clinal germination ranges. It strongly suggests an evolutionary gradient, which connects the intermediate complex MPD with the non-deep complex MPD in southern Iberian daffodils. This is the first study showing a gradient in the evolution between levels of MPD. Our results demonstrate a cline in these levels in response to both an environmental gradient and genetic differences.

How does Copaifera langsdorffii respond to flooding under different irradiance levels?

This study investigated the potential of shading to mitigate the stressful effects of different periods of flooding, favoring the recovery of seedlings in the post-flooding period. Copaifera langsdorffii Desf. seedlings were grown under three different levels of light availability (100%, 70%, and 30%), and two water conditions (control and flooded). During the flooding period, plants were evaluated at 0, 45, and 90 days, and at 45 days after the cessation of each period of flooding to assess post-flooding effects (45 + 45 and 90 + 45 days). There was an increase in internal concentration of CO2, and increased activity of antioxidant enzymes in both the leaves and roots at all levels of light availability, with more pronounced effects under shady conditions (30% brightness). The plants demonstrated the capacity to survive flooding but did not fully recover within 45 days after the suspension of flooding, as evidenced by an evaluation of physiological and biochemical characteristics. We concluded that shading does not mitigate the stressful effects of flooding. Flooding and cultivation under 30% light availability created stressful conditions for the plants, which presented adjustment mechanisms that allowed the resumption of balance up to 45 days after the suspension of flooding, especially when grown under high light conditions.

Yield prediction with machine learning algorithms and satellite images

Barley is one of the strategic agricultural products available in the world, and yield prediction is important for ensuring food security. One way of estimating a product is to use remote sensing data in conjunction with field data and meteorological data. One of the main issues surrounding this comprises the use of machine learning techniques to create a multi-resource data-based estimation model. Many studies have been conducted on barley yield prediction from planting to harvest. Still, the effect of different time intervals on yield prediction has not been investigated. Furthermore, the effect of different periods on yield prediction has not been investigated. In the present study, the whole growth period was divided into three parts. Using one of the major barley production areas in Iran, the performance of the proposed model was evaluated. In the first step, a model for integrating field data, remote sensing data and meteorological data was prepared. The results obtained show that, among the four machine learning methods implemented, the gaussian process regression algorithm performed best and estimated yield with r2 = 0.84, root mean square error = 737 kg ha-1 and mean absolute = 650 kg ha-1 , 1 month before harvest. It was found that the estimation results change depending on different agricultural zones and temporal training settings. The findings of the present study provide a powerful potential tool for the yield prediction of barley using multi-source data and machine learning. © 2020 Society of Chemical Industry.

Chronic REM sleep restriction in young rats increases energy expenditure with no change in food intake.

What is the central question of this study? What are the effects of different periods of REM sleep restriction (7, 14 and 21days) on metabolic parameters in young rats? What is the main finding and its importance? Animals submitted to each period of REM sleep deprivation showed a negative energy balance, with reduced body weight gain, body energy gain and gross food efficiency, less body fat content, and increased energy expenditure. There was no increase in food intake after any of the REM sleep restriction periods. In young rats, negative energy balance is not compensated by increased dietary intake as observed in adult rats. Reduced sleep is associated with metabolic alterations, not only in adults, but also in children and adolescents. Several studies have shown that sleep restricted (SR) adult rats exhibit metabolic changes, followed by increased food intake, but few have evaluated these functions in young animals. The aim of the present study was to establish the metabolic parameters of young rats subjected to different periods of REM sleep restriction and to propose a correction factor for the correct measurement of food intake. Young male Wistar rats were distributed in control and SR groups for 7, 14 or 21days. Sleep restriction was performed by the single platform method for 18 h. Regardless of the length of sleep restriction, all SR rats had a negative energy balance, evidenced by reduction in body weight gain, body energy gain and gross food efficiency, accompanied by increased energy expenditure. In addition, sleep restriction reduced body fat content throughout the entire period. Discounting food spillage, there was no increase in food intake by SR rats. In conclusion, the present study revealed metabolic changes in SR young rats after different lengths of REM sleep restriction and that weight loss and increased energy expenditure were not compensated by increased dietary intake as occurs in adult rats, indicating that young rats use other mechanisms to cope with the negative energy balance caused by sleep restriction. In addition, we propose a correction factor for food intake, to prevent overestimation of this parameter, due to food spillage in the water containers.

The spatial effect of tourism economic development on regional ecological efficiency.

The process of tourism economic development is accompanied by the consumption of energy and environment. It is of a big significance to measure the level of tourism economic development and regional eco-efficiency correctly to clarify the relationship between them, as it contributes to realizing the high-quality development of the tourism economy and the construction of "beautiful China". On the basis of the panel data of China's 30 provinces and cities from 2002 to 2016, the paper intends to evaluate the regional eco-efficiency and tourism economic development level by using the super-efficiency DEA model and the grey entropy weight method, and then construct spatial panel econometric model which is based on the previous data to deeply discuss the influence of tourism economy development on regional ecological efficiency and its spatial effect. The research shows that (1) regional ecological efficiency has significant spatial dependence and spatial aggregation characteristics. With the passing of time, this kind of positive spatial autocorrelation is gradually strengthened. (2) In the long-term development, tourism economic development and regional ecological efficiency show a more obvious "Kuznets curve" effect. (3) The "U"-curve relationship between urbanization, environmental regulation, and regional eco-efficiency was confirmed. (4) In the process of tourism economic transformation and development, industrial pollution control, environmental regulation, technological level, urbanization, and investment openness are the main factors that affect the improvement of ecological efficiency in the local region. (5) Tourism economic development and urbanization levels have different spatial spillover effects in different periods, while investment openness has obvious positive spillover effects.

Menstrual cycle and use of different doses of oral contraceptive do not affect torque parameters in strength training programs

The aim of this study was twofold: (a) to verify the effects of different periods of Menstrual Cycle (MC) (menstrual and non-menstrual) of women who use (users) or did not use (non-users) oral contraceptive (OC); (b) to compare the influence of the use of different doses of OCs at these MC moments. Two groups, women who did not use OC (NCG = 13) and women who use OC (CG = 13). The participants were assessed on the 1st or 2nd day of their menstrual period and the 14th or 15th day post-menstrual period. The Peak Torque (PT) and work (W) variables were evaluated at all MC moments. To compare the estrogen dosage, CG was subdivided into two subgroups, (ULCG = 6) that used ultra-low doses of estrogen and a group (LCG = 7) that used low. No interaction (group x period) was observed for PTisometric (F=0.170, p=0.687), PTconcentric (F=0.495, p=0.495) and PTeccentric (F=0.348, p=0.566), Wconcentric (F=0.001, p=0.971) and Weccentric (F=0.075, p=0.790). In addition, no significant interactions (dose x period) were observed in the torque parameters between women who used OC at different estrogen dosages (PTisometric: F=0.803, p=0.411; PTconcentric: F=0.548, p=0.492; PTeccentric: F=0.239, p=0.645; Wconcentric: F=0.030, p=0.869, Weccentric: F=0.027, p=0.876). In conclusion, using or not using OC seems to have no effect on torque parameters at the different moments of MC. Furthermore, the different doses of the OCs did not seem to promote effects on torque and work during MC.

Effects of different periods of starvation and compensatory growth on growth indices and hematological parameters in common carp (Cyprinus carpio).

Effects of different periods of starvation and compensatory growth on growth indices and hematological parameters in common carp (Cyprinus carpio).

Effects of the Characteristics and Duration of Chronic Pain on Psychosomatic Function in the Community-Dwelling Elderly Population.

Catastrophic thinking is related to pain intensity and the degree of disability and influences pain care significantly. However, only few studies have investigated the impact of catastrophic thinking on chronic pain (CP) in the community-dwelling elderly population. This study aimed to evaluate the characteristics of CP in the community-dwelling elderly population and to investigate the effects of different periods of CP on cognitive and psychological functions. A total of 187 community-dwelling elderly people met the inclusion criteria and were included in this cross-sectional study. The survey items included demographic data (age and gender), pain-related questionnaires, psychological and cognitive functions, and sleep status. The duration of CP was investigated using three categories: no pain and pain for ≤1 year and ≥1 year. A logistic regression analysis was performed to identify the factors most strongly associated with the presence of CP. The difference in each assessment was compared according to duration of CP among the three groups and analyzed using the chi-square test, Kruskal–Wallis test, and one-way analysis of variance. The PCS scores and depression scores were significantly higher in long duration of CP compared with no pain and pain for ≤1 year. The present study is consistent with the fear-avoidance model and was concluded that community-dwelling elderly people with CP are depressive and tend to magnify their pain with long duration of CP.