scholarly journals Incidence and Characteristics of Intraocular Lens Dislocation after Phacoemulsification: An Eight-Year, Nationwide, Population-Based Study

2021 ◽  
Vol 10 (17) ◽  
pp. 3830
Author(s):  
Ga-In Lee ◽  
Dong Hui Lim ◽  
Sang Ah Chi ◽  
Seon Woo Kim ◽  
Jisang Han ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Incidence Rate ◽  
Population Based ◽  
Health Claims ◽  
Cumulative Probability ◽  
Population Based Study ◽  
Young Males ◽  
Intraocular Lens Dislocation ◽  
Cumulative Probabilities ◽  
Iol Dislocation

Background: We investigate the incidence and characteristics of IOL dislocation among the pseudophakic population after phacoemulsification. Methods: National data were collected from the health claims recorded with the Health Insurance Review and Assessment Service of South Korea from 2009 to 2016. Pseudophakic patients aged 40 years or older were included. The incidence estimates of phacoemulsification and IOL dislocation were analyzed, and the cumulative probabilities of IOL dislocation among the pseudophakic population and general population were calculated as a proportion. Results: Of 51,307,821 total subjects, 25,271,917 of whom were aged 40 years or older, 3,906,071 cataract cases in 2,650,104 pseudophakic patients were identified, and 72,309 patients experienced IOL dislocation. The cumulative probability was 2.73% per person and 1.85% per surgery among patients 40 years of age or older. The eight-year incidence rate for IOL dislocation in the pseudophakic population aged 40 years or older was 7671 per 1,000,000 person-years (95% CI: 7616–7727), including 10,341 cases in men and 5814 in women. Incidence peaked in the seventh decade of life for cataract surgery but in the fifth decade of life for IOL dislocation. The cumulative probability of IOL dislocation after phacoemulsification was approximately 2%, and the incidence rate was about 7000 per 1,000,000 pseudophakic patients. Conclusions: There was a significantly higher incidence of IOL dislocation among young males, even though the higher incidence of cataract surgery was observed among older females. These estimates of the nationwide, population-based incidence of IOL dislocation can help increase understanding of the population vulnerable to IOL dislocation.

scholarly journals Lymphoproliferative malignancies in patients with neurofibromatosis 1

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Christina Bergqvist ◽  
François Hemery ◽  
Arnaud Jannic ◽  
Salah Ferkal ◽  
Pierre Wolkenstein
Keyword(s):  
General Population ◽  
Medical History ◽  
Hodgkin Lymphoma ◽  
Incidence Rate ◽  
Population Based ◽  
Neurofibromatosis 1 ◽  
Population Based Study ◽  
Non Hodgkin Lymphoma ◽  
History Of

AbstractNeurofibromatosis 1 (NF1) is an inherited, autosomal-dominant, tumor predisposition syndrome with a birth incidence as high as 1:2000. A patient with NF1 is four to five times more likely to develop a malignancy as compared to the general population. The number of epidemiologic studies on lymphoproliferative malignancies in patients with NF1 is limited. The aim of this study was to determine the incidence rate of lymphoproliferative malignancies (lymphoma and leukemia) in NF1 patients followed in our referral center for neurofibromatoses. We used the Informatics for Integrated Biology and the Bedside (i2b2) platform to extract information from the hospital’s electronic health records. We performed a keyword search on clinical notes generated between Jan/01/2014 and May/11/2020 for patients aged 18 years or older. A total of 1507 patients with confirmed NF1 patients aged 18 years and above were identified (mean age 39.2 years; 57% women). The total number of person-years in follow-up was 57,736 (men, 24,327 years; women, 33,409 years). Mean length of follow-up was 38.3 years (median, 36 years). A total of 13 patients had a medical history of either lymphoma or leukemia, yielding an overall incidence rate of 22.5 per 100,000 (0.000225, 95% confidence interval (CI) 0.000223–0.000227). This incidence is similar to that of the general population in France (standardized incidence ratio 1.07, 95% CI 0.60–1.79). Four patients had a medical history leukemia and 9 patients had a medical history of lymphoma of which 7 had non-Hodgkin lymphoma, and 2 had Hodgkin lymphoma. Our results show that adults with NF1 do not have an increased tendency to develop lymphoproliferative malignancies, in contrast to the general increased risk of malignancy. While our results are consistent with the recent population-based study in Finland, they are in contrast with the larger population-based study in England whereby NF1 individuals were found to be 3 times more likely to develop both non-Hodgkin lymphoma and lymphocytic leukemia. Large-scale epidemiological studies based on nationwide data sets are thus needed to confirm our findings.

scholarly journals The elevated risk of sight-threatening cataract in diabetes with retinopathy: a retrospective population-based cohort study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Chan-Wei Nien ◽  
Chia-Yi Lee ◽  
Hung-Chi Chen ◽  
Shih-Chun Chao ◽  
Hung-Jui Hsu ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Multivariable Analysis ◽  
Population Based ◽  
Cumulative Probability ◽  
Control Group ◽  
Study Group ◽  
Research Database ◽  
Proportional Hazard ◽  
Cox Proportional Hazard ◽  
Cox Proportional Hazard Regression

Abstract Background The effect of diabetic retinopathy (DR) on the development of sight-threatening cataracts was assessed using the National Health Insurance Research Database of Taiwan. Methods Patients diagnosed with diabetes mellitus (DM) and DR were enrolled in the study group. Age- and sex-matched DM individuals without DR and patients without DM served as the DM control group and non-DM control group, respectively, both with 1:4 ratios. The outcome was set as the performance of cataract surgery. Cox proportional hazard regression was used to calculate the adjusted hazard ratio (aHR) of DR considering multiple factors underlying cataract formation. Results A total of 3297 DR patients, 13,188 DM control patients and 13,188 non-DM control subjects were enrolled. The study group included 919 events of sight-threatening cataracts (27.87%), the DM control group included 1108 events (8.40%), and the non-DM control group included 957 events (7.26%). A multivariable analysis indicated that the study group presented a higher aHR of cataract surgery (2.93, 95% CI: 2.60–3.30) and a higher cumulative probability of cataract surgery than both the DM control and non-DM control groups (both log rank P < 0.001). In addition, both the proliferative DR (3.90, 95% CI: 3.42–4.45) and nonproliferative DR (2.35, 95% CI: 2.08–2.65) subgroups showed a higher aHR of cataract surgery than the DM control group. Conclusion The presence of DR increases the risk of sight-threatening cataracts that warrant surgery, and the effect is prominent among patients with both proliferative DR and nonproliferative DR.

Risk Factors for Acute Endophthalmitis after Cataract Surgery: A Population-based Study

Ophthalmology ◽  
2009 ◽  
Vol 116 (3) ◽  
pp. 425-430 ◽  
Author(s):  
Wendy V. Hatch ◽  
Geta Cernat ◽  
David Wong ◽  
Robert Devenyi ◽  
Chaim M. Bell
Keyword(s):  
Risk Factors ◽  
Cataract Surgery ◽  
Population Based ◽  
Population Based Study

Fecundity among women with polycystic ovary syndrome (PCOS)—a population-based study

2019 ◽  
Vol 34 (10) ◽  
pp. 2052-2060 ◽  
Author(s):  
S Persson ◽  
E Elenis ◽  
S Turkmen ◽  
M S Kramer ◽  
E-L Yong ◽  
...  
Keyword(s):  
Polycystic Ovary Syndrome ◽  
Cox Regression ◽  
Polycystic Ovary ◽  
Nordic Country ◽  
Reproductive Potential ◽  
Population Based ◽  
Fertility Treatment ◽  
Cumulative Probability ◽  
Ovary Syndrome ◽  
Population Based Study

Abstract STUDY QUESTION Does the long-term fecundity of women with polycystic ovary syndrome (PCOS) differ from those without PCOS? SUMMARY ANSWER Cumulative probability of childbirth is similar between women with and without PCOS. WHAT IS KNOWN ALREADY PCOS is the main cause of anovulatory infertility in women after menarche. Previous studies indirectly suggest that fecundity in women with PCOS over the longer term may not be lower than in women without PCOS. STUDY DESIGN, SIZE, DURATION This is a population-based study using four linked Swedish national registries. A total of 45 395 women with PCOS and 217 049 non-PCOS women were included. Follow-up began at the age of 18 years and continued for a maximum of 26 years, from 1989 to the end of 2015. Childbirth was the main outcome, as identified from the Medical Birth Register. PARTICIPANTS/MATERIALS, SETTING, METHODS All women born between 1971 and 1997 who were identified with a PCOS diagnosis in the Swedish Patient Registry between 1 January 2001 and 31 December 2016 were included in the study population. Five controls per women with PCOS were randomly drawn from the Total Population Registry. The control women were born in the same year and living in the same municipality as the patient. The fecundity ratio (FR) was calculated by clustered Cox regression using a robust variance, adjusted for maternal birth period, country of birth and level of education. MAIN RESULTS AND THE ROLE OF CHANCE The cumulative probability of childbirth was 80.2% (95% CI, 79.5–80.9%) in women with PCOS and 78.2% (95% CI, 77.9–78.5%) in those without PCOS. Adjusted FR was 0.81 (95% CI, 0.80–0.82) for first childbirth and 0.58 (95% CI, 0.57–0.60) for first childbirth following a spontaneous pregnancy. The FR for second childbirth was 0.79 (95% CI, 0.77–0.80). Women with PCOS had more than one child less frequently than the comparison group. Within the PCOS group, early age at diagnosis, later birth year, Nordic country of origin and low educational level positively influenced the FR. LIMITATIONS, REASONS FOR CAUTION Results are not adjusted for BMI, and time from intention to conceive to first childbirth could not be captured. Data on pregnancies, miscarriages or abortions and fertility treatment are unknown for women who did not give birth during the study period. Women with PCOS who did not seek medical assistance might have been incorrectly classified as not having the disease. Such misclassification would lead to an underestimation of the true association between PCOS and outcomes. WIDER IMPLICATIONS OF THE FINDINGS While cumulative probability of childbirth is similar between groups, women with PCOS need longer time to achieve their first childbirth. Women with PCOS have a lower FR and give birth to fewer children per woman than women without PCOS. Early diagnosis of and information about PCOS may improve affected women’s reproductive potential. STUDY FUNDING/COMPETING INTEREST(S) This study was funded by the Swedish Society of Medicine. Inger Sundström Poromaa has, over the past 3 years, received compensation as a consultant and lecturer for Bayer Schering Pharma, MSD, Gedeon Richter, Peptonics and Lundbeck A/S. The other authors declare no competing interests.

scholarly journals P803 The risk of spine and hip fracture in patients with inflammatory bowel diseases: a nationwide population-based study

2020 ◽  
Vol 14 (Supplement_1) ◽  
pp. S629-S629
Author(s):  
Y J Kim ◽  
H J Ahn ◽  
S Noh ◽  
J C Park ◽  
J Y Kim ◽  
...  
Keyword(s):  
Hip Fracture ◽  
Regression Model ◽  
Incidence Rate ◽  
Inflammatory Bowel Diseases ◽  
Cox Regression ◽  
Population Based ◽  
Population Based Study ◽  
Cox Regression Model ◽  
Bowel Diseases ◽  
Inflammatory Bowel

Abstract Background This nationwide population-based study sought to investigate the risk of spine and hip fracture in patients with inflammatory bowel diseases (IBD). Methods Using the 2007–2016 data from the Korean national health insurance claims database, we calculated incidence rate and incidence rate ratios (IRR) of spine and hip fracture in patients with IBD (n = 18,228; 64.1% male, 65.9% ulcerative colitis [UC]) compared with age- and sex- frequency matched subjects in 1:10 ratio (n = 186,871). A Cox regression model was used to evaluate risk of spine and hip fracture. Results The incidence rate and IRR of spine and hip fracture in IBD were 2.88/1000 person-years and 1.21 (95% confidence interval [CI], 1.11–1.31) during the median follow-up of 4.5 years. The risk for spine and hip fracture was significantly higher in UC (IRR 1.39, 95% CI, 1.25- 1.54), whereas it was not significantly higher in Crohn’s disease (IRR 0.85, 95% CI, 0.67- 1.06) than matched controls. In UC, the IRR of spine fracture was 1.41 (95% CI, 1.24–1.58) and the IRR of hip fracture was 1.40 (95% CI, 1.11–1.71). In multivariable analysis using the Cox regression model, the risk of spine and hip fracture increased with age (p trend &lt; 0.001), in female patients (adjusted hazard ratio [aHR], 1.94; 95% CI, 1.50–2.51) and in patients with comorbidities including osteoporosis (aHR 2.86; 95% CI, 2.10–3.89), stroke (aHR 2.74; 95% CI, 1.78–4.21) hypertension (aHR 1.82; 95% CI, 1.38–2.41), diabetes mellitus (aHR 1.67; 95% CI, 1.25–2.24) and dyslipidaemia (aHR 1.36; 95% CI, 1.05–1.78). Conclusion In a population-based study from Korea, we found that the risk for spine and hip fracture increased in patients with IBD, especially in UC patients. Also, this risk increased in patients who are older, female, or have comorbidities.

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