Many people have bad habits.Some people eat too much candy and other junk food.Some people smoke.Other people complain abouteverything.Some people say mean things behind people's backs.And they can't stop.Teen...Many people have bad habits.Some people eat too much candy and other junk food.Some people smoke.Other people complain abouteverything.Some people say mean things behind people's backs.And they can't stop.Teenagers often stay up late.Too much screen time is a common bad habit,too.Bad habits can cause health problems.Do you have any bad habits?You can get help,and you can quit.Then you can start some good habits.展开更多
BACKGROUND Optical coherence tomography angiography(OCTA)is a new and reliable machine used to evaluate retinal structure and macular perfusion in children.The use of OCTA under bad condition such as high altitude,low...BACKGROUND Optical coherence tomography angiography(OCTA)is a new and reliable machine used to evaluate retinal structure and macular perfusion in children.The use of OCTA under bad condition such as high altitude,low atmospheric oxygen,and low humidity,in children is rarely.AIM To quantify the macular micro-vasculature in healthy children of various ages using OCTA in Qamdo.METHODS Design:Prospective cross-sectional,school-based study.Three hundred and fortyseven normal students from 9 schools in 4 different areas in Qamdo were included.OCTA was performed on a 3 mm×3 mm area centered on the macular region and macular cube 512×128 showed details in macular.Early treatment of diabetic retinopathy study Vessel Flow Density(VD)of the macular central vascular plexus density(CVD),inner vascular plexus density(IVD),full vascular plexus density(FVD),and the size of the foveal avascular zone(FAZ)were measured.All these results corrected by t/s=3.382×0.01306×(axial length-1.82).The differences were compared among various ages,sexes and living environments.RESULTS The mean FAZ area in all eyes was 0.27 mm^(2)±0.12 mm^(2).The mean foveal thickness(MFT)in the macular cube was 227.64μm±23.51μm.Compared with girls,boys had a lager FAZ(P=0.0029).Among the different age groups,MFT(P<0.001)and FVD(P<0.0001),IVD(P<0.0001),and CVD(P=0.0050)increased with age.FAZ areas were not correlated with age(P=0.8853)or others(MFT,area).CONCLUSION OCTA can use to evaluate macular perfusion in children.Our data bridge the gap between structural OCT and perfusion density in children in high altitude.Even though these were not a longitudinal study,it may provide us with hints about retina development during puberty and clinical implications of OCTA in children.展开更多
Introduction: Over time, new sexual practices other than the common ones are frequently described. This work aimed to determine the sexual orientation and its associated factors among adolescents attending school in t...Introduction: Over time, new sexual practices other than the common ones are frequently described. This work aimed to determine the sexual orientation and its associated factors among adolescents attending school in two big cities in Cameroon. Methodology: A cross-sectional study with prospective data collection took place from November 2021 to April 2022 in eight secondary schools (four in Yaoundé and four in Douala). We conducted non-probability, consecutive sampling on school-going, sexually active adolescents between the ages of 14 and 19 years. A self-administered questionnaire to students was used to study their sexual orientations and practices. Univariate and multivariate analyses made it possible to find the associated factors using the chi-square test. Results: We included 1274 adolescents with an average age of 18 years;majority were boys (54.8%) for a sex ratio of 1.21. Most (49.7%) were from two-parent families. Cisgender was the most common self-gender identity (89.6%). The main sexual orientation was heterosexuality (82.3%), followed by bisexuality (9.7%) and homosexuality (8%). The average age at first sexual intercourse (coitarche) was 15 years and the coitarche was consenting in 84.1%. Sexual practices included: kissing (94.7%), fondling (93.4%), vaginal penetration (80.6%), oral sex (40.4%), masturbation (22.8%), fisting (18.4%), and anal penetrations (17.5%). The majority of sexual intercourse acts (55.8%) took place without protection;24.6% of adolescents practiced them with a person of the same sex and 18.4% with several others simultaneously. The factors associated with heterosexuality were age ≤17 years (aOR: 2.44 [1.36 - 4.40];p = 0.003), self-identification opposite to primary sexual characteristics (aOR: 12.05 [5.13 - 28.29];p 0.001), absence of consent during the first coitus (aOR: 7.09 [3.61 - 13.93];p 0.001) and a history of sexual intercourse with a person of the same sex (aOR: 94.17 [43.36 - 183.39];p 0.001). Conclusion: Although most adolescents are heterosexual in the school environment, the authors raise the importance of providing guidance in the aspect of sexual orientation particularly on the psychological and behavioral level considering age, self-gender identity, sexual consent, and using protection during the sexual experience.展开更多
Nowadays many teenagers play online games.Too much violence in online games deeply affects the teenagers' life,makes them act in a violent manner.Actions should be brought for change to protest.
Ulcerative colitis in addition to inflammatory polyposis is common.The benign sequel of ulcerative colitis can sometimes mimic colorectal carcinoma.This report describes a rare case of inflammatory polyposis with hund...Ulcerative colitis in addition to inflammatory polyposis is common.The benign sequel of ulcerative colitis can sometimes mimic colorectal carcinoma.This report describes a rare case of inflammatory polyposis with hundreds of inflammatory polyps in ulcerative colitiswhich was not easy to distinguish from other polyposis syndromes.A 16-year-old Chinese male suffering from ulcerative colitis for 6 mo underwent colonoscopy,and hundreds of polyps were observed in the sigmoid,causing colonic stenosis.The polyps were restricted to the sigmoid.Although rectal inflammation was detected,no polyps were found in the rectum.A diagnosis of inflammatory polyposis and ulcerative colitis was made.The patient underwent total colectomy and ileal pouch anal anastomosis.The patient recovered well and was discharged on postoperative day 8.Endoscopic surveillance after surgery is crucial as ulcerative colitis with polyposis is a risk factor for colorectal cancer.Recognition of polyposis requires clinical,endoscopic and histopathologic correlation,and helps with chemoprophylaxis of colorectal cancer,as the drugs used postoperatively for colorectal cancer,ulcerative colitis and polyposis are different.展开更多
AIM： To assess the late outcome of teen-agers with a previous history of recurrent abdominal pain （RAP） or irritable bowel syndrome （IBS）. METHODS： A group of 67 children with RAP referred to the department from...AIM： To assess the late outcome of teen-agers with a previous history of recurrent abdominal pain （RAP） or irritable bowel syndrome （IBS）. METHODS： A group of 67 children with RAP referred to the department from January 1986 to December 1995 was followed up between 5 and 13 years after the initial diagnosis by means of a structured telephone interview. We hypothesized that those patients with persistent adult IBS-like symptoms would be significantly more likely to report a family history oflBS in comparison with adults with no persistent abdominal complaint. RESULTS： Out of the 52 trackable subjects, 15 were found to present IBS-like symptoms at follow-up （29%） whereas the majority （37 subjects） did not. Subjects with IBS-like symptoms were almost three times more likely to present at least one sibling with similar symptoms compared to subjects not complaining （40.0% vs 16.0%）, respectively （P 〈 0.05 at Student t test）. Subjects with IBS-like symptoms also reported a higher prevalence of extra-intestinal symptoms, such as back pain, fibromyalgia, headache, fatigue and sleep disturbances. CONCLUSION： The study confirms previous observations indicating that pediatric RAP can predict later development of IBS. The latter appears to be greatly influenced by intrafamilial aggregation of symptoms, possibly through the learning of a specific illness behavior.展开更多
文摘Many people have bad habits.Some people eat too much candy and other junk food.Some people smoke.Other people complain abouteverything.Some people say mean things behind people's backs.And they can't stop.Teenagers often stay up late.Too much screen time is a common bad habit,too.Bad habits can cause health problems.Do you have any bad habits?You can get help,and you can quit.Then you can start some good habits.
基金Supported by the National Natural Science Foundation of China,No.81870650,No.81570832,and No.81300794Science and Technology Program Chongqing,China,No.2018GDRC008.
文摘BACKGROUND Optical coherence tomography angiography(OCTA)is a new and reliable machine used to evaluate retinal structure and macular perfusion in children.The use of OCTA under bad condition such as high altitude,low atmospheric oxygen,and low humidity,in children is rarely.AIM To quantify the macular micro-vasculature in healthy children of various ages using OCTA in Qamdo.METHODS Design:Prospective cross-sectional,school-based study.Three hundred and fortyseven normal students from 9 schools in 4 different areas in Qamdo were included.OCTA was performed on a 3 mm×3 mm area centered on the macular region and macular cube 512×128 showed details in macular.Early treatment of diabetic retinopathy study Vessel Flow Density(VD)of the macular central vascular plexus density(CVD),inner vascular plexus density(IVD),full vascular plexus density(FVD),and the size of the foveal avascular zone(FAZ)were measured.All these results corrected by t/s=3.382×0.01306×(axial length-1.82).The differences were compared among various ages,sexes and living environments.RESULTS The mean FAZ area in all eyes was 0.27 mm^(2)±0.12 mm^(2).The mean foveal thickness(MFT)in the macular cube was 227.64μm±23.51μm.Compared with girls,boys had a lager FAZ(P=0.0029).Among the different age groups,MFT(P<0.001)and FVD(P<0.0001),IVD(P<0.0001),and CVD(P=0.0050)increased with age.FAZ areas were not correlated with age(P=0.8853)or others(MFT,area).CONCLUSION OCTA can use to evaluate macular perfusion in children.Our data bridge the gap between structural OCT and perfusion density in children in high altitude.Even though these were not a longitudinal study,it may provide us with hints about retina development during puberty and clinical implications of OCTA in children.
文摘Introduction: Over time, new sexual practices other than the common ones are frequently described. This work aimed to determine the sexual orientation and its associated factors among adolescents attending school in two big cities in Cameroon. Methodology: A cross-sectional study with prospective data collection took place from November 2021 to April 2022 in eight secondary schools (four in Yaoundé and four in Douala). We conducted non-probability, consecutive sampling on school-going, sexually active adolescents between the ages of 14 and 19 years. A self-administered questionnaire to students was used to study their sexual orientations and practices. Univariate and multivariate analyses made it possible to find the associated factors using the chi-square test. Results: We included 1274 adolescents with an average age of 18 years;majority were boys (54.8%) for a sex ratio of 1.21. Most (49.7%) were from two-parent families. Cisgender was the most common self-gender identity (89.6%). The main sexual orientation was heterosexuality (82.3%), followed by bisexuality (9.7%) and homosexuality (8%). The average age at first sexual intercourse (coitarche) was 15 years and the coitarche was consenting in 84.1%. Sexual practices included: kissing (94.7%), fondling (93.4%), vaginal penetration (80.6%), oral sex (40.4%), masturbation (22.8%), fisting (18.4%), and anal penetrations (17.5%). The majority of sexual intercourse acts (55.8%) took place without protection;24.6% of adolescents practiced them with a person of the same sex and 18.4% with several others simultaneously. The factors associated with heterosexuality were age ≤17 years (aOR: 2.44 [1.36 - 4.40];p = 0.003), self-identification opposite to primary sexual characteristics (aOR: 12.05 [5.13 - 28.29];p 0.001), absence of consent during the first coitus (aOR: 7.09 [3.61 - 13.93];p 0.001) and a history of sexual intercourse with a person of the same sex (aOR: 94.17 [43.36 - 183.39];p 0.001). Conclusion: Although most adolescents are heterosexual in the school environment, the authors raise the importance of providing guidance in the aspect of sexual orientation particularly on the psychological and behavioral level considering age, self-gender identity, sexual consent, and using protection during the sexual experience.
文摘Nowadays many teenagers play online games.Too much violence in online games deeply affects the teenagers' life,makes them act in a violent manner.Actions should be brought for change to protest.
文摘Ulcerative colitis in addition to inflammatory polyposis is common.The benign sequel of ulcerative colitis can sometimes mimic colorectal carcinoma.This report describes a rare case of inflammatory polyposis with hundreds of inflammatory polyps in ulcerative colitiswhich was not easy to distinguish from other polyposis syndromes.A 16-year-old Chinese male suffering from ulcerative colitis for 6 mo underwent colonoscopy,and hundreds of polyps were observed in the sigmoid,causing colonic stenosis.The polyps were restricted to the sigmoid.Although rectal inflammation was detected,no polyps were found in the rectum.A diagnosis of inflammatory polyposis and ulcerative colitis was made.The patient underwent total colectomy and ileal pouch anal anastomosis.The patient recovered well and was discharged on postoperative day 8.Endoscopic surveillance after surgery is crucial as ulcerative colitis with polyposis is a risk factor for colorectal cancer.Recognition of polyposis requires clinical,endoscopic and histopathologic correlation,and helps with chemoprophylaxis of colorectal cancer,as the drugs used postoperatively for colorectal cancer,ulcerative colitis and polyposis are different.
文摘AIM： To assess the late outcome of teen-agers with a previous history of recurrent abdominal pain （RAP） or irritable bowel syndrome （IBS）. METHODS： A group of 67 children with RAP referred to the department from January 1986 to December 1995 was followed up between 5 and 13 years after the initial diagnosis by means of a structured telephone interview. We hypothesized that those patients with persistent adult IBS-like symptoms would be significantly more likely to report a family history oflBS in comparison with adults with no persistent abdominal complaint. RESULTS： Out of the 52 trackable subjects, 15 were found to present IBS-like symptoms at follow-up （29%） whereas the majority （37 subjects） did not. Subjects with IBS-like symptoms were almost three times more likely to present at least one sibling with similar symptoms compared to subjects not complaining （40.0% vs 16.0%）, respectively （P 〈 0.05 at Student t test）. Subjects with IBS-like symptoms also reported a higher prevalence of extra-intestinal symptoms, such as back pain, fibromyalgia, headache, fatigue and sleep disturbances. CONCLUSION： The study confirms previous observations indicating that pediatric RAP can predict later development of IBS. The latter appears to be greatly influenced by intrafamilial aggregation of symptoms, possibly through the learning of a specific illness behavior.
