P–220 Delayed-ICSI on day1-matured oocytes in low responders of different age groups

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
Z Q Tee ◽  
J P Sam ◽  
A Y X Lim ◽  
C S S Lee
Keyword(s):  
Maternal Age ◽  
Age Groups ◽  
Immature Oocytes ◽  
Low Responders ◽  
Group A ◽  
Low Responder ◽  
Group B ◽  
Larger Sample ◽  
Cycle Outcome ◽  
Euploidy Rates

Abstract Study question Is the cycle outcome of day0-ICSI (day0-matured oocytes) and delayed-ICSI (day1-matured oocytes) in low responders affected by maternal age? Summary answer Delayed-ICSI improves cycle outcome of low responders in all age groups by providing additional blastocysts for embryo transfer and/or pre-implantation genetic testing for aneuploidies (PGT-A). What is known already We had previously compared the fertilization, blastulation, blastocyst utilisation, and euploidy rates between day0-ICSI and delayed-ICSI (Lee, C.S.S., 2018). We believed that patients who have <7 mature oocytes (low responders) can benefit by having their concomitant immature oocytes cultured to day 1. This study evaluates the benefit of delayed-ICSI in improving the cycle outcome of such low responders from different age groups. Study design, size, duration From January 2018 to December 2020, 434 IVF cycles in Alpha IVF & Women’s Specialists were classified as low responder (being <7 oocytes injected on day 0). The immature oocytes were further cultured and delayed-ICSI was done on day1-matured oocytes. Patients were divided into 3 groups: (A) ≤35 years old (n = 137; mean maternal age=32.5; range=23.0–35.0); (B) 36–40 years old (n = 208; mean maternal age=38.2; range=36.0–40.0); and (C) >40 years old (n = 89; mean maternal age=42.7; range=41.0–49.0). Participants/materials, setting, methods Semen samples were processed by density gradient centrifugation and/or swim-up method. Day0-matured oocytes were injected at 2.5–4.5 hours post-retrieval (PIEZO, Japan). Immature oocytes were further cultured for 18–24hours and delayed-ICSI was done immediately after maturity assessment. Injected oocytes were cultured up to 7 days and trophectoderm biopsy for PGT-A screening (IonTorrent, USA) was performed on selected blastocysts prior to vitrification (Cryotec, Japan). The cycle outcomes of day0-ICSI and delayed-ICSI were analysed and compared. Main results and the role of chance In Group A, the fertilisation, blastulation, blastocyst utilisation and euploidy rates of day0-ICSI and day1-ICSI were 80.0% vs. 70.9%, 74.7% vs. 33.6%, 57.1% vs. 17.9%, and 52.3% vs. 30.8% respectively. The fertilisation (p = 0.0024), blastulation (p = 0.0001), utilization (p = 0.001) and euploidy (p = 0.0205) rates of delayed-ICSI were significantly lower compared to day0-ICSI. In Group B, the fertilisation, blastulation, blastocyst utilisation and euploidy rates of day0-ICSI and day1-ICSI were 77.3% vs. 64.1%, 75.0% vs. 37.5%, 52.7% vs. 20.6% and 26.0% vs. 32.1% respectively. Delayed-ICSI showed significantly lower fertilisation (p = 0.0001), blastulation (p = 0.0001) and utilization (p = 0.0001) rates than day0-ICSI, but the euploidy rate was comparable (p = 03997). In Group C, the fertilisation, blastulation and blastocyst utilisation rates of day0-ICSI and delayed-ICSI were 76.6% vs. 56.4%, 67.1% vs. 22.8%, 34.3% vs. 7.9% respectively. Similar to Group B, the fertilization (p = 0.0001), blastulation (p = 0.0001) and utilisation (p = 0.0003) rates in day0-ICSI was significantly higher than delayed-ICSI. No significant difference was observed between the euploidy rates of day0-ICSI and delayed-ICSI (18.9% vs. 0.0%, p = 0.3452). Despite all blastocysts derived from delayed-ICSI in this group being aneuploid, it could still increase the chances of these patients obtaining an euploid blastocyst. Limitations, reasons for caution Analysis on Group B was done on a larger sample size compared to Group A and C. A larger sample size in Group A and C is needed to further support our results. Wider implications of the findings: Delayed-ICSI generates additional blastocysts for low responders from all age groups. Therefore, delayed-ICSI could be a routine procedure in low responder IVF patients in order to optimise the cycle and clinical outcomes. Trial registration number Not applicable

Hypercoagulable State in the Watanabe Heritable Hyperlipidemic Rabbit, an Animal Model for the Progression of Atherosclerosis

1989 ◽  
Vol 61 (01) ◽  
pp. 140-143 ◽  
Author(s):  
Yoshitaka Mori ◽  
Hideo Wada ◽  
Yutaka Nagano ◽  
Katsumi Deguch ◽  
Toru Kita ◽  
...  
Keyword(s):  
Vitamin K ◽  
Fibrinogen Level ◽  
Plasma Cholesterol ◽  
Age Groups ◽  
Clotting Factor ◽  
Clotting Factors ◽  
Group A ◽  
Hyperlipidemic Rabbit ◽  
Group B ◽  
Progression Of Atherosclerosis

SummaryBlood coagulation in a strain of rabbits designated as Watanabe heritable hyperlipidemic (WHHL) rabbits was examined. The activities of vitamin K-dependent clotting factors, contact factors and clotting factor VIII (F VIII) and the fibrinogen level were significantly higher in WHHL rabbits than in normolipidemic rabbits (all age groups). Values for vitamin Independent clotting factor were already higher at 2 months of age. Contact factors and fibrinogen levels increased age after 5 to 8 months. F VIII increased between 5 and 8 months and then decreased. At 2 months of age, WHHL rabbits were divided into two groups. Group A was fed standard rabbit chow and group B standard rabbit chow containing 1% probucol. Probucol prevented the progression of atherosclerosis in group B in the absence of a significant reduction in plasma cholesterol level. F VIII and fibrinogen levels were statistically decreased in all rabbits at all ages in group B (P<0.05). These differences in clotting factors between the two groups were most obvious at 8 months (P<0.02).We conclude that vitamin K-dependent clotting factors may increase with hyperlipemia and that increases in F VIII and fibrinogen may be closely related to the progression of throm- boatherosclerosis.

Age related volume of cadaver-prostates in Bangladesh

1970 ◽  
Vol 4 (2) ◽  
pp. 74-77
Author(s):  
Rukshana Ahmed ◽  
Shamim Ara
Keyword(s):  
Prostate Gland ◽  
Age Groups ◽  
Clinical Settings ◽  
Cross Sectional ◽  
Medical College ◽  
Age Related ◽  
Group A ◽  
Key Words Prostate ◽  
The Mean ◽  
Group B

Pathological changes in the prostate gland occur commonly with advancing age including inflammation, atrophy, hyperplasia and carcinoma and a change in volume is also evident. Estimation of volume of prostate may be useful in a variety of clinical settings. A cross-sectional descriptive study was designed to see the changes in volume of the prostate with advancing age and done in the Department of Anatomy, Dhaka Medical College, Dhaka from August 2006 to June 2007. The study was performed on 70 post-mortem human prostates collected from the unclaimed dead bodies that were under examination in the Department of Forensic Medicine, Dhaka Medical College, Dhaka. The samples were divided into three age groups; group A (10-20 years), group B (21-40 years) and group C (41-70 years). Volume of the sample was measured by using the ellipsoid formula. The mean ± SD volume of prostate was 7.68 ± 3.64 cm3 in group A, 10.61 ± 3.99 cm3 in group B and 15.40 ± 6.31 cm3 in group C. Mean difference in volume between group A and group C, group B and group C were statistically significant (p<0.001). Statistically significant positive correlation was found between age and volume of prostate (r = + 0.579, p < 0.001). Key Words: Prostate; volume; Bangladeshi. DOI: 10.3329/imcj.v4i2.6501Ibrahim Med. Coll. J. 2010; 4(2): 74-77

Histological Study of Human Thyroid Gland Relative Proportion of Parenchyma and Stroma in Thyroid Glands of Bangladeshi People

2013 ◽  
Vol 1 (2) ◽  
pp. 17-20
Author(s):  
Md Enayet Ullah ◽  
Hasna Hena ◽  
Rubina Qasim
Keyword(s):  
Thyroid Gland ◽  
Histological Study ◽  
Relative Proportion ◽  
Age Groups ◽  
Human Thyroid ◽  
Structural Units ◽  
Thyroid Glands ◽  
Group A ◽  
Group B ◽  
Connective Tissue Sheath

Deep cervical fascia forms a connective tissue sheath around the thyroid gland. Delicate trabeculae and septa penetrate the gland indistinctly dividing the gland into lobes and lobules which in turn composed of follicles.1,2,3 These follicles are structural units of thyroid gland which varies greatly in size and shape.4 The number of follicles varies in different age groups. The study was carried out to see the percentage of area occupied by follicles in the stained section of thyroid glands in different age groups. The collected samples were grouped as A (3.5 – 20yrs), B (21- 40yrs) & C (41 – 78yrs). Percentage of area occupied by follicles was (58.55±10.72) in group A, (63.79±12.35) in group B + (63.39±8.29) in group C.DOI: http://dx.doi.org/10.3329/updcj.v1i2.13981 Update Dent. Coll. j. 2011: 1(2): 17-20

Does body position, age, and heart rate induce IOP’s changes?

2021 ◽  
pp. 112067212110233
Author(s):  
Marcelina Sobczak ◽  
Magdalena Asejczyk ◽  
Malwina Geniusz
Keyword(s):  
Heart Rate ◽  
Body Position ◽  
Age Groups ◽  
Cardiovascular Parameters ◽  
Entire Cohort ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Group B ◽  
Effect Of Age

Objectives: The main goal of this research was to determine the differences between the values of intraocular pressure (IOP) in the supine and sitting positions, and to assess the effect of age and cardiovascular parameters. Methods: Seventy-two healthy adults were enrolled and classified into age groups: 20–30 years (group A), 31–40 years (group B), and 41–71 years (group C). Corneal biometry and cardiovascular parameters, such as heart rate (HR), were measured. IOP measurements were taken in the sitting position (IOPS) and in the supine position (IOPL) using the iCare® Pro tonometer. Results: A significant difference between the IOPS and IOPL in the entire cohort was found ( p < 0.001). Regarding the age subgroups, a significant difference ( p < 0.001) between the IOPS and IOPL was obtained in group A (2.6 ± 1.6 mmHg) and group C (1.5 ± 1.3 mmHg). There were no significant differences in the IOPS between groups. The highest IOP values were obtained for group A. The correlations between HR and IOPS are statistically significant for group A and group B, and for HR and IOPL-S for group B only. Multivariate analysis showed that HR has a significant influence on the difference in IOP in the two body positions. Conclusion: A statistically significant difference between the effect of age and the values of IOPS and IOPL was shown. Cardiovascular parameters showed some relevant statistical dependencies, but with a rather marginal significance in young people. The influence of body position for the measurement of IOP for healthy subjects does not seem to matter, despite the fact that there are some dependencies that are statistically significant.

scholarly journals CLINICAL STUDY ON SHIREESHADI AVAPEEDANA NASYA IN THE MANAGEMENT OF SURYAVARTHA (FRONTAL SINUSITIS)

2021 ◽  
Vol 9 (8) ◽  
pp. 1654-1658
Author(s):  
Amarnath H K
Keyword(s):  
Clinical Study ◽  
Economic Status ◽  
Age Groups ◽  
Frontal Sinusitis ◽  
Nasal Blockage ◽  
X Ray ◽  
Group A ◽  
Foul Smell ◽  
Group B ◽  
Clinical Conditions

Nasya karma is considered a prime treatment modality in all types of Shiroroga (Headache) and also in Suryavar- tha (Frontal Sinusitis). Suryavartha (Frontal Sinusitis) is one of the 11 types of Shiroroga. It is one of the com- mon clinical conditions found in day to day general as well as Shalakya (ENT) practice. It presents with headache as one of its cardinal features and its occurrence is found in both genders and in all age groups. Objective: To study the efficacy of Shireeshadi Avapeedana Nasya in the management of Suryavartha (Frontal Sinusitis). Ma- terial methods: Twenty patients of Suryavartha (Frontal Sinusitis) were diagnosed and registered for the clinical study irrespective of sex, socio-economic status, and religion. The study was divided into two groups - Group A and Group B. Group – A patients were treated with Shireeshadi Avapeedana Nasya for 7 days and Group – B patients were treated by Nasya with milk for 7 days. Observation and result: Among 20 patients of Suryavartha / frontal sinusitis, 20 (100%) of patients had headache, 11 (55%) had nasal blockage, 05 (25%) had nasal dis- charge, 08 (40%) had foul smell in their breath and 14 (70%) have variations from normal X-Ray. The severity of headache is significantly reduced after treatment in both Groups A and B (92.95% and 73.07%) respectively. Conclusion: Administration of Shireeshadi Avapeeda Nasya showed statistically significant improvement in the management of Suryavartha (Frontal Sinusitis). Keywords: Suryavartha, Nasya, Shireeshadi Avapeedana Nasya, Frontal Sinusitis, Shigru, Mulaka, Ksheera.

scholarly journals Morphological Changes of Placenta in Preeclampsia

1970 ◽  
Vol 7 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Segupta Kishwara ◽  
Shamim Ara ◽  
Khandaker Abu Rayhan ◽  
Mahamuda Begum
Keyword(s):  
Morphological Changes ◽  
Medical College ◽  
Group A ◽  
Different Shapes ◽  
The Difference ◽  
To Come ◽  
Group B ◽  
Larger Sample ◽  
Normal Placenta ◽  
Human Placentae

Context: Preeclampsia is regarded as a risk factor in pregnancy and it leads to placental insufficiency. This, in turn causes both maternal and fetal morbidity and mortality. The present study intends to compare the morphological changes of placenta in preeclampsia with that of normal placenta. Study design: A descriptive type of study. Place and period of study: Department of Anatomy, Dhaka Medical College, Dhaka, from August 2005 to June 2006. Materials: 60 human placentae, 30 were from normal pregnant women as control and 30 from pregnancies complicated by preeclampsia were taken for this study. Method: Samples were grouped as Group A and Group B on the basis of presence or absence of preeclampsia. All samples were studied morphologically. Result: Different shapes of placenta were found with some having accessory lobes in both groups. There was significant reduction (p< 0.001) in diameter and volume of placenta in Group B. The thickness of placenta was reduced in Group B but the difference did not reach a significant level. The number of cotyledon was significantly reduced in Group B (p<0.05). Conclusion: In this study, it was found that the preeclamptic placentae underwent definite morphological changes. These changes seemed to be the result of insufficiency of placenta in preeclampsia. However, further histological and morphometric placental study in a larger sample has to be conducted to come up with a conclusive decision. Key Words: Placenta, Preeclampsia, Morphology.   doi: 10.3329/bja.v7i1.3026 Bangladesh Journal of Anatomy January 2009, Vol. 7 No. 1 pp. 49-54

scholarly journals Correlation of plasma concentrations of cystatin C and creatinine to inulin clearance in a pediatric population

1998 ◽  
Vol 44 (6) ◽  
pp. 1334-1338 ◽  
Author(s):  
Douglas Stickle ◽  
Barbara Cole ◽  
Karl Hock ◽  
Keith A Hruska ◽  
Mitchell G Scott
Keyword(s):  
Correlation Coefficient ◽  
Cystatin C ◽  
Linear Correlation ◽  
Pediatric Patients ◽  
Plasma Concentrations ◽  
Age Groups ◽  
Inulin Clearance ◽  
Blood Concentrations ◽  
Group A ◽  
Group B

Abstract Measurement of blood concentrations of cystatin C (cysC), a cysteine protease inhibitor present in human plasma, has been suggested for use as an indicator of glomerular filtration rate (GFR) in a manner analogous to the use of plasma creatinine (SCR). In this study, cysC and SCR were measured in plasma from pediatric patients (4–19 years) with renal disease for whom a “gold standard” measurement of GFR via inulin clearance (CIN) was available. The data analyses were divided into two age groups: group A (4–12 years, n = 26) and group B (12–19 years, n = 34). For both age groups, the linear correlation coefficient of [cysC]−1 vs CIN (mL/min/1.73 m2) (r = 0.765 for group A and r = 0.869 for group B) was less than that of the linear correlation coefficient of [SCR]−1 vs CIN (r = 0.841 for group A and r = 0.892 for group B). As a single measurement for detection of abnormal GFR, however, the optimum receiver-operator characteristic point for cysC measurement (for group A at cysC &gt;1.2 mg/L, sensitivity = 80%, specificity = 91%; and for group B at cysC &gt;1.4 mg/L, sensitivity = 87%, specificity = 100%) was numerically superior to that for SCR measurement (for group A at SCR &gt;8.0 mg/L, sensitivity = 67%, specificity = 100%; and for group B at SCR &gt;9.0 mg/L, sensitivity = 91%, specificity = 91%), using a reference value for normal GFR of CIN &gt; 90 mL/min/1.73 m2. However, these differences were not statistically significant. CysC measurement appears to be broadly equivalent to SCR measurement for estimation of GFR in pediatric patients.

scholarly journals A COMPARITIVE STUDY BETWEEN EPIDURAL BUTORPHANOL, NALBUPHINE AND FENTANYL FOR POSTOPERATIVE ANALGESIA IN LOWER ABDOMINAL SURGERIES

2017 ◽  
Vol 10 (5) ◽  
pp. 383
Author(s):  
Swarna Banerjee ◽  
Shaswat Kumar Pattnaik
Keyword(s):  
Side Effects ◽  
Demographic Data ◽  
Age Groups ◽  
Study Drug ◽  
Sensory Block ◽  
Lower Abdomen ◽  
Post Operative Pain ◽  
Catheter Group ◽  
Group A ◽  
Group B

Background: Achieving satisfactory post-operative analgesia with neuraxial administration of narcotics has been the subject of much research. The use of epidural opioids had become an increasingly popular technique for management of acute post-operative pain in recent times. This study evaluates post-operative analgesic benefits in patients administered epidural butorphanol, nalbuphine, and fentanyl as adjuvants with local anesthetics postoperatively for surgery under epidural anesthesia.Methods: A total of 75 patients belonging to age groups 18-60 years who were scheduled for surgeries of lower abdomen were randomly divided into groups of 25 each. Epidural technique was adopted for surgery of the lower abdomen for all patients with 0.5% bupivacaine. In the post-operative period, the study drug was given through epidural catheter. Group A received butorphanol 2 mg, Group B received fentanyl 100 μg, and Group C received nalbuphine 10 mg with 0.125% bupivacaine diluted to 10 ml in normal saline each. Onset, duration, quality of analgesia, hemodynamic changes, and side effects – such as sedation, pruritus, nausea, vomiting, respiratory depression, and urinary retention - were recorded and compared.Results: The demographic data were comparable in all three groups. The onset of sensory block was significantly earlier in Group B (fentanyl) than other two groups. Duration was significantly longer in Group A (butorphanol). No serious cardiorespiratory side effects were noted in any of groups.Conclusion: Fentanyl produces the faster onset of analgesia with adverse effects like pruritus. Butorphanol administered epidurally has the advantage of longer duration of analgesia than fentanyl or epidural nalbuphine with side effects such as nausea, vomiting, and sedation.Keywords: Epidural analgesia, Butorphanol, Fentanyl, Nalbuphine.

scholarly journals A postmortem study on the weight of the human adrenal glands

1970 ◽  
Vol 9 (4) ◽  
pp. 204-207 ◽  
Author(s):  
Dilruba Siddiqua ◽  
Shamim Ara ◽  
Abu Sadat Mohammad Nurunnabi ◽  
Rukshana Ahmed ◽  
Ara Parven Hosne
Keyword(s):  
Adrenal Gland ◽  
Adrenal Glands ◽  
Medical Science ◽  
Age Groups ◽  
Cross Sectional ◽  
Medical College ◽  
Group A ◽  
Group B ◽  
The Right ◽  
Group D

Objective: A cross-sectional descriptive type of study was designed to find out the difference in weight of the right and left adrenal glands of Bangladeshi people in relation to age and to compare with the previous studies. Materials & Methods: The study was done in the Department of Anatomy, Dhaka Medical College, Dhaka from July 2008 to June 2009 and performed on 140 post mortem human adrenal glands collected from 70 unclaimed dead bodies which were in the morgue under examination in the Department of Forensic Medicine, Dhaka Medical College, Dhaka. The samples were divided into four age-groups including group A (11-20 years), group B (21-30 years), group C (31-40 years) & group D (41-60 years) and the weight of the adrenal glands were measured and recorded. Results: There was no difference found in weight in between the right and the left adrenal glands in any age group. For the right adrenal gland, the differences in weight between group A & group B and group A & group D were statistically significant (p<0.05). For the left adrenal gland, the differences in weight between group A & group D and group C & group D were statistically significant (p<0.05). Key words: Adrenal gland; weight of adrenal gland. DOI: 10.3329/bjms.v9i4.6686Bangladesh Journal of Medical Science Vol.09 No.4 July 2010 pp.204-207

Risk Factors for Thrombosis Vary According to Age in Patients with Essential Thrombocythemia: a Retrospective Analysis of 1090 Patients from the “Gruppo Laziale SMPC Ph Negative “,

Blood ◽  
2011 ◽  
Vol 118 (21) ◽  
pp. 3854-3854
Author(s):  
Marco Montanaro ◽  
Roberto Latagliata ◽  
Michele Cedrone ◽  
Nicoletta Villivà ◽  
Raffaele Porrini ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Cardiovascular Risk Factors ◽  
Thrombotic Event ◽  
Age Groups ◽  
Thrombotic Risk ◽  
Mutational Status ◽  
Group A ◽  
Group B

Abstract Abstract 3854 Increasing age is a well-recognised risk factor for thrombotic events in patients with Essential Thrombocythemia (ET): however, few data exist on the role of other clinical and biological features in different age groups. To address this issue, we analysed retrospectively 1090 ET patients (M/F 403/687, median age 63 years, IR 17 – 96) diagnosed at 11 Hematological Institutions in the Lazio region from 1980 to 2010 and with a median period of follow-up of 84 months (IR 1 – 371). Based on the commonly adopted age threshold, 480 patients (44 %) were < 60 years (Group A) and 610 (56 %) were ≥ 60 years (Group B). Clinical and biological features as well as cardiovascular risk factors analyzed for the impact on the thrombotic risk in the two age groups are reported in the Table.Group A < 60 yearsGroup B ≥ 60 yearsPutative risk factorsRisk ratio (95% CI)P valueRisk ratio (95% CI)P valueM/F167/3132.68 (1.03–6.94)0.0029236/3741.12 (0.17–2.59)0.73WBC median (range) x 109/l8.9 (4.29–22.35)0.387 (0.149–1,004)0.06458.9 (1.2–57.7)0.79 (0.41–1.47)0.445PLTS median (range) x 109/l837 (451–3582)0.37 (0.258–1.70)0.66802 (450–3104)0.52 (0.28–0.99)0.0052Hb median, g/dL (range)14.1 (6.0–18.4)0.86 (0.33–2.24)0.76914.0 (7.0–17.8)0.87 (0.45–1.67)0.674*JAK-2 mutational status: wild type/mutated (%)53.2/46.81.57 (0.50–4.87)0.4434.1/65.90.498 (0.17–1.48)0.209Previous thrombotic events: n° (%)· All events72 (15)2.18 (0.59–7.96)0.12149 (24.4)3.01 (1.38–6.57)0.0004· within 24 months from diagnosis48 (10)1.43 (0.19–10.4)0.7464 (10.5)0.506 (0.18–1.39)0.189· within 60 months from diagnosis60 (12.5)NA0.5191 (14.9)0.323 (0.11–0.95)0.023Cardiovascular risk factors: Y/N %○ Arterial hypertension41.7/58.31.68(0.64–4.36)0.2880.7/19.30.96 (0.36–2.57)0.935○ Diabetes10.2/89.81.11 (0.23–5.15)0.8925.0/75.01.09 (0.38–3.11)0.86○ Smoking attitude45.6/54.42.78 (1.01–7.65)0.06758.3/41.71.04 (0.35–3.09)0.94○ Hyperlipidemia31.0/69.03.11(0.917–10.592)0.03951.6/48.42.31 (0.70–7.55)0.203 In Group A, 39 patients (8.1%) had at least one thrombotic event during follow-up; there were 20 (51.3%) arterial thrombosis and 19 (48.7%) venous thrombosis. In Group B, 63 patients (10.3%) had at least one thrombotic event during follow-up; there were 38 (69.4%) arterial thromboses and 25 (39.6%) venous thromboses. In group A univariate analysis for thrombosis-free survival performed by Kaplan-Meier method, disclosed a significant impact of male gender (p=0.0029, CI 1.03–6.94, HR 2.68), > 2 cardiovascular risk factors (p=0.0002, CI 1.87 – 190, HR 18.94) and isolated hyperlipidemia (p=0.039, CI 0.917 – 10.59, HR 3.11), while previous thrombotic events had no significant impact (p=0.27). By contrast, the presence of a previous thrombotic event was the only feature with a significant impact on thrombotic risk in Group B (p=0.0004, CI 1.38 – 6.55, HR 3.01). WBC and PLTS values at different cut-off levels as well as JAK-2 mutational status did not have any impact on thrombosis in either age groups. However, in group B, we observed a trend (p=0.052, CI 0.28–0.99, HR 0.52) towards a protective effect of higher PLTS values (> 800 × 109/l). In conclusion, our data seem to reinforce the need of a different thrombotic risk assessment in distinct age groups: in particular, younger patients could benefit from early recognition and treatment of well-known cardiovascular risk factors. Disclosures: No relevant conflicts of interest to declare.

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