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See detailA longitudinal perspective of alcohol use among adolescents: the predictive role of peers and internalizing factors.
Schmits, Emilie ULg; Glowacz, Fabienne ULg; Quertemont, Etienne ULg

Poster (2014, July 09)

Alcohol is the most commonly used psychoactive substance among teenagers. Consumption is influenced by environmental factors and personal characteristics, events or experiences. High use can lead to ... [more ▼]

Alcohol is the most commonly used psychoactive substance among teenagers. Consumption is influenced by environmental factors and personal characteristics, events or experiences. High use can lead to substantial problems, especially after an early consumption. Detecting and preventing an increase of alcohol use among teenagers, through the identification of risk and protective factors, seems essential in terms of public health. This study aimed to examine the progression of use in young teenagers, to identify protective and risk factors of alcohol use (including peers and internalizing factors) and to specifically focus on the influence of social anxiety. A questionnaire was administered twice to 877 teenagers (49.94% female, M=15.61) with one year interval (T1 and T2). Sex, age, alcohol use, number of friends, social comparison, trait-anxiety, social anxiety and depression were assessed through validated scales. T-test for paired sample and hierarchical regressions were performed. During the follow-up year, the average alcohol use significantly increased. A positive social comparison at T1 significantly predicted alcohol use at T2. The more teenagers positively compared themselves to their friends and felt popular, the more they consume alcohol. A similar significant effect was demonstrated for depression. The more young people manifested depressive affects at T1, the more they used alcohol at T2. However, social anxiety significantly protected from this substance use. More social anxiety at T1 was associated with less alcohol consumption at T2. The number of friends and trait-anxiety at T1 did not significantly influence alcohol use at T2. A positive social comparison and depressive affects could be considered as risk factors, whereas social anxiety could be defined as protective factor. At this developmental period, young people suffering from social anxiety symptoms subsequently use less alcohol, maybe due to the lack of contact with this substance usually socially consumed, whereas more popular and integrated teenagers are more at risk. The present results challenge the tension-reduction model according to which alcohol is consumed to reduce anxious affects and to facilitate social relationships. However, results suggest that alcohol might be used to reduce unpleasant depressive affects. [less ▲]

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See detailLongitudinal quality of life assessment in cancer trials: should data be treated as continuous or ordinal?
Donneau, Anne-Françoise ULg; Mauer, Murielle; Coens, Corneel et al

Poster (2013, October 11)

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See detailLongitudinal quality of life data: a comparison of continuous and ordinal approaches
Donneau, Anne-Françoise ULg; Mauer, Murielle; Coens, C et al

in Quality of Life Research (2014), 23(10), 2873-2881

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See detailA longitudinal study of ABC transporter expression in canine multicentric lymphoma.
Zandvliet, M.; Teske, Erik ULg; Schrickx, J. A. et al

in Veterinary journal (London, England : 1997) (2014)

Canine lymphoma is typically treated with a doxorubicin-based multidrug chemotherapy protocol. Although this is often initially successful, tumour recurrence is common and frequently refractory to ... [more ▼]

Canine lymphoma is typically treated with a doxorubicin-based multidrug chemotherapy protocol. Although this is often initially successful, tumour recurrence is common and frequently refractory to treatment. Failure to respond to chemotherapy is thought to represent drug resistance and has been associated with active efflux of cytostatic drugs by transporter proteins of the ATP-binding cassette (ABC) family, including P-glycoprotein (ABCB1), MRP1 (ABCC1) and BCRP (ABCG2). In this study, ABC transporter mRNA expression was assessed in 63 dogs diagnosed with multicentric lymphoma that were treated with a doxorubicin-based chemotherapy protocol. Expression of ABCB1, ABCB5, ABCB8, ABCC1, ABCC3, ABCC5 and ABCG2 mRNA was quantified in tumour samples (n = 107) obtained at the time of diagnosis, at first tumour relapse and when the tumour was no longer responsive to cytostatic drugs while receiving chemotherapy. Expression data were related to patient demographics, staging, treatment response and drug resistance (absent, intrinsic, acquired). ABC transporter expression was independent of sex, weight, age, stage or substage, but T cell lymphoma and hypercalcaemia were associated with increased ABCB5 and ABCC5 expression, and decreased ABCC1 mRNA expression. Drug resistance occurred in 35/63 (55.6%) dogs and was associated with increased ABCB1 mRNA expression in a subset of dogs with B cell lymphoma, and with increased ABCG2 and decreased ABCB8, ABCC1 and ABCC3 mRNA expression in T cell lymphomas. ABC transporter expression in the pre-treatment sample was not predictive of the length of the first disease-free period or overall survival. Glucocorticoids had no effect on ABC transporter mRNA expression. In conclusion, drug resistance in canine multicentric lymphoma is an important cause of treatment failure and is associated with upregulation of ABCB1 and ABCG2 mRNA. [less ▲]

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See detailLongitudinal study of European birth cohorts on pet ownership up to age 10 years as a risk for childhood asthma - a GA²LEN project
Mahachie John, Jestinah ULg; Roll, S.; Lau, S. et al

in European Respiratory Journal. Supplement (2010), 36(supplement 54),

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See detailA longitudinal study of isokinetic characteristics of young athletes and prevention of muscular and joint injury: Preliminary results - Abstract
Amato, M.; Afriat, P.; Portero, P. et al

in Isokinetics & Exercise Science (2003), 11(1), 53-54

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See detailLongitudinal study of magnetic resonance imaging and fixed-flexion radiography to assess progression of osteoarthritis of the knee
Kothari, Manish; Peterfy, Charles; Bruyère, Olivier ULg et al

in Arthritis and Rheumatism (2005, September), 52(number 9 (suppl.)), 65

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See detailLongitudinal study of magnetic resonance imaging and fixed-flexion radiography to assess progression of osteoarthritis of the knee
Bruyère, Olivier ULg; Kothari, M.; Peterfy, C. et al

in Osteoporosis International (2006, March), 17(Suppl.1), 85

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See detailLongitudinal study of magnetic resonance imaging and standard X-rays to assess disease progression in osteoarthritis
Bruyère, Olivier ULg; Genant, H.; Kothari, M. et al

in Osteoarthritis and Cartilage (2007), 15(1), 98-103

Objective: To investigate, over 1-year, the relationship between X-ray and magnetic resonance imaging (MRI) findings in patients with knee osteoarthritis (OA). Methods: Sixty-two osteoarthritic patients ... [more ▼]

Objective: To investigate, over 1-year, the relationship between X-ray and magnetic resonance imaging (MRI) findings in patients with knee osteoarthritis (OA). Methods: Sixty-two osteoarthritic patients (46 women) were followed for 1 year. At baseline and after 1 year, volume and thickness of cartilage of the medial tibia, the lateral tibia and the femur were assessed by MRI. A global score from the multi-feature whole-organ MRI scoring system (WORMS) was calculated for each patient at baseline and after 1 year. This score combined individual scores for articular cartilage, osteophytes, bone marrow abnormality, subchondral cysts and bone attrition in 14 locations. It also incorporated scores for the medial and lateral menisci, anterior and posterior cruciate ligaments, medial and lateral collateral ligaments and synovial distension. Lateral and medial femorotibial joint space width (JSW) measurements, performed by digital image analysis, were assessed from fixed-flexion, postero-anterior knee radiographs. Results: One-year changes in medial femoro-tibial JSW reach 6.7 (20.5) % and changes in medial cartilage volume and thickness reach 0.4 (16.7) % and 2.1 (11.3) %, respectively. Medial femoro-tibial joint space narrowing (JSN) after 1 year, assessed by radiography, was significantly correlated with a loss of medial tibial cartilage volume (r = 0.25, P = 0.046) and medial tibial cartilage thickness (r = 0.28, P = 0.025), over the same period. We found also a significant correlation between the progression of the WORMS and radiographic medial JSN over 1 year (r = -0.35, P = 0.006). All these results remained statistically significant after adjusting for age, sex and body mass index. Conclusion: This study shows a moderate but significant association between changes in JSW and changes in cartilage volume or thickness in knee joint of osteoarthritic patients. (C) 2006 Osteoarthritis Research Society International. Published by Elsevier Ltd. All rights reserved. [less ▲]

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See detailLongitudinal study of the effects of lungworm infection on bovine pulmonary function
Lekeux, Pierre ULg; Hajer, R.; Breukink, H. J.

in American Journal of Veterinary Research (1985), 46(6), 1392-1395

Clinical and physiologic investigations were done weekly in 5 nonsedated Friesian calves before, during, and after an induced infection with Dictyocaulus viviparus infective larvae. Clinical, hematologic ... [more ▼]

Clinical and physiologic investigations were done weekly in 5 nonsedated Friesian calves before, during, and after an induced infection with Dictyocaulus viviparus infective larvae. Clinical, hematologic, serologic, and parasitologic findings were all compatible with the classic picture of moderate subacute verminous bronchitis. Most pulmonary function values revealed significant (P less than or equal to 0.05) changes in the 2nd or 3rd week after inoculation and maximal changes at 5 weeks after inoculation. Most marked changes included a decrease in tidal volume, dynamic lung compliance, and arterial oxygen tension, and an increase in minute ventilation, minute viscous work of breathing, and alveolar-arterial oxygen difference. Minute ventilation, dynamic lung compliance, minute viscous work of breathing, and PaO2 revealed the most homogeneous change. Conversely, maximal change of intrapleural pressure, total pulmonary resistance, and viscous work of breathing had higher variability from week to week [less ▲]

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See detailA longitudinal study on the perinatal growth of brain, cerebellum and skeletal muscles in premature babies
Battisti, Oreste ULg; Withofs, Léon; Langhendries, Jean-Paul et al

in BMC Pregnancy and Childbirth (2012)

Detailed reference viewed: 52 (9 ULg)
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See detailLongitudinal study to explain early exit : work or quality of life ?
Bertrand, Françoise ULg; Schreurs, B.; Tibax, V. et al

Conference (2007, October 12)

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See detailA longitudinal test of the Job Demands-Resources model using perveived stigma and social identity
Barbier, Marie; Dardenne, Benoît ULg; Hansez, Isabelle ULg

in European Journal of Work and Organizational Psychology (2013), 22(5), 532-546

Detailed reference viewed: 65 (29 ULg)
Peer Reviewed
See detailThe longitudinal variation of the color ratio of the Jovian ultraviolet aurora: a geometric effect?
Gérard, Jean-Claude ULg; Grodent, Denis ULg; Dols, V. et al

in Geophysical Research Letters (1998), 25(10), 1601-1604

A three-dimensional model is used to assess the role of the viewing geometry on the auroral color ratio. The simulations show that both an auroral are with a geometry deduced from images obtained with the ... [more ▼]

A three-dimensional model is used to assess the role of the viewing geometry on the auroral color ratio. The simulations show that both an auroral are with a geometry deduced from images obtained with the Hubble Space Telescope (HST) and a uniform polar cap emission produce no modulation or a minimum absorption when the longitude of the Jovian central meridian (CML) is close to 200 degrees. This result is in contrast with the statistical measurements made with the International Ultraviolet Explorer (IUE) spectrograph that the hydrocarbon optical depth above the auroral emission maximizes for CMLs about 180 degrees. In the frame of this simplified model, we examine a possible way to reconcile the model with the IUE data. An intrinsic longitudinal dependence of the column of methane above the level of the auroral emission is introduced in the simulation. It may result from a combination of a vigorous upwelling in sectors of strong acid stable precipitation and/or a longitudinal dependence of the characteristic energy of the auroral particles. [less ▲]

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See detailLongterm Photometry of Variables at ESO - Part Two - the Second Data Catalogue 1986-1990
Sterken, C.; Manfroid, Jean ULg; Anton, K. et al

in Astronomy and Astrophysics. Supplement Series (1993), 102

In this paper we present the second catalogue of photometric data in the Strömgren system obtained during the period October 1986- September 1990 in the framework of the Long-Term Photometry of Variables ... [more ▼]

In this paper we present the second catalogue of photometric data in the Strömgren system obtained during the period October 1986- September 1990 in the framework of the Long-Term Photometry of Variables (LTPV) program at the European Southern Observatory. The catalogue is available in computer readable form at the Centre de Données de Strasbourg. [less ▲]

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See detailLongwave Sky Radiation Parametrizations
Aubinet, Marc ULg

in Solar Energy (1994), 53(2),

Detailed reference viewed: 38 (3 ULg)
See detailLONNIE BROOKS Portrait/Interview
Sacré, Robert ULg

Article for general public (1977)

Detailed reference viewed: 9 (0 ULg)