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Dive into the research topics where Sebastian Bonner is active.

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Featured researches published by Sebastian Bonner.


Archive | 1996

Developing self-regulated learners : beyond achievement to self-efficacy

Barry J. Zimmerman; Sebastian Bonner; Robert Kovach

Understanding the Principles of Self-Regulated Learning Developing Time Planning and Management Skills Developing Text Comprehension and Summarisation Skills Developing Classroom Note-Taking Skills Developing Test Anticipation and Preparation Skills Developing Writing Skills Final Issues - Introducing Self-Regulated Learning into the Classroom.


Journal of Asthma | 2002

An Individualized Intervention to Improve Asthma Management Among Urban Latino and African-American Families

Sebastian Bonner; Barry J. Zimmerman; David Evans; Matilde Irigoyen; David Resnick; Robert B. Mellins

We hypothesized that an educational intervention based on a readiness model would lead to improved health outcomes among patients with asthma. Within a randomized control design in an urban Latino and African-American community, we conducted an intensive three-month pediatric intervention. A Family Coordinator provided patient education based on a readiness-to-learn model, and facilitated improved interactions between the patient and the doctor. Family education addressed the most basic learning needs of patients with asthma by improving their perception of asthma symptom persistence using asthma diaries and peak flow measures. The physician intervention focused clinicians’ attention on patients’ diary records and peak flow measures, and encouraged physicians to use stepped action plans. Patients were also tested for allergic sensitization and provided strategies to reduce contact with allergens and other asthma triggers. The results showed significant improvements by intervention group families on measures of knowledge, health beliefs, self-efficacy, self- regulatory skill, and adherence; decreases in symptom persistence and activity restriction; and increased prescription of anti-inflammatory medication by the physicians of the intervention group families.


Psychosomatic Medicine | 2003

Relationship of Self-Reported Asthma Severity and Urgent Health Care Utilization to Psychological Sequelae of the September 11, 2001 Terrorist Attacks on the World Trade Center Among New York City Area Residents

Joanne Fagan; Sandro Galea; Jennifer Ahern; Sebastian Bonner; David Vlahov

Objective Posttraumatic psychological stress may be associated with increases in somatic illness, including asthma, but the impact of the psychological sequelae of the September 11, 2001 terrorist attacks on physical illness has not been well documented. The authors assessed the relationship between the psychological sequelae of the attacks and asthma symptom severity and the utilization of urgent health care services for asthma since September 11. Materials and Methods The authors performed a random digit dial telephone survey of adults in the New York City (NYC) metropolitan area 6 to 9 months after September 11, 2001. Two thousand seven hundred fifty-five demographically representative adults including 364 asthmatics were recruited. The authors assessed self-reported asthma symptom severity, emergency room (ER) visits, and unscheduled physician office visits for asthma since September 11. Results After adjustment for asthma measures before September 11, demographics, and event exposure in multivariate models posttraumatic stress disorder (PTSD) were a significant predictor of self-reported moderate-to-severe asthma symptoms (OR = 3.4; CI = 1.2–9.4), seeking care for asthma at an ER since September 11 (OR = 6.6; CI = 1.6–28.0), and unscheduled physician visits for asthma since September 11 (OR = 3.6; CI = 1.1–11.5). The number of PTSD symptoms was also significantly related to moderate-to-severe asthma symptoms and unscheduled physician visits since September 11. Neither a panic attack on September 11 nor depression since September 11 was an independent predictor of asthma severity or utilization in multivariate models after September 11. Conclusions PTSD related to the September 11 terrorist attacks contributed to symptom severity and the utilization of urgent health care services among asthmatics in the NYC metropolitan area.


American Journal of Public Health | 2008

A Randomized Intervention Trial to Reduce the Lending of Used Injection Equipment Among Injection Drug Users Infected With Hepatitis C

Mary H. Latka; Holly Hagan; Farzana Kapadia; Elizabeth T. Golub; Sebastian Bonner; Jennifer V. Campbell; Micaela H. Coady; Richard S. Garfein; Minya Pu; Dave L. Thomas; Thelma Thiel; Steffanie A. Strathdee

OBJECTIVES We evaluated the efficacy of a peer-mentoring behavioral intervention designed to reduce risky distributive injection practices (e.g., syringe lending, unsafe drug preparation) among injection drug users with hepatitis C virus (HCV) infection. METHODS A randomized trial with a time-equivalent attention-control group was conducted among 418 HCV-positive injection drug users aged 18 to 35 years in 3 US cities. Participants reported their injection-related behaviors at baseline and at 3- and 6-month follow-ups. RESULTS Compared with the control group, intervention-group participants were less likely to report distributive risk behaviors at 3 months (odds ratio [OR]=0.46; 95% confidence interval [CI]=0.27, 0.79) and 6 months (OR=0.51; 95% CI=0.31, 0.83), a 26% relative risk reduction, but were no more likely to cite their HCV-positive status as a reason for refraining from syringe lending. Effects were strongest among intervention-group participants who had known their HCV-positive status for at least 6 months. Peer mentoring and self-efficacy were significantly increased among intervention-group participants, and intervention effects were mediated through improved self-efficacy. CONCLUSIONS This behavioral intervention reduced unsafe injection practices that may propagate HCV among injection drug users.


Sexually Transmitted Diseases | 2011

Sexual partner characteristics, serodiscordant/serostatus unknown unprotected anal intercourse and disclosure among human immunodeficiency virus-infected and uninfected black men who have sex with men in New York City.

Hong-Van Tieu; Guozhen Xu; Sebastian Bonner; Pilgrim Spikes; James E. Egan; Krista Goodman; Kiwan Stewart; Beryl A. Koblin

Objectives: Black men who have sex with men (MSM) are disproportionately infected with human immunodeficiency virus (HIV) in the United States. This study describes sexual partner characteristics and disclosure of HIV serostatus and evaluates factors associated with sexual risk behaviors during last sex among black MSM. Design and Methods: Between 2008 and 2009, 328 black MSM who reported recent unprotected anal intercourse were enrolled in an HIV behavioral intervention study in New York City. Factors associated with serodiscordant/serostatus unknown UAI (defined as having UAI with a partner of different or unknown HIV serostatus) with a male partner during last sex were assessed using logistic regression. Results: A total of 205 HIV-infected and 123 uninfected men were enrolled in this study. Almost all men (91.6%) reported having a black male partner during last sex. About half (47.3%) of men used alcohol and 38.7% used other substances before or during last sex. About two-thirds (68.8%) of participants disclosed their HIV status to their last sex partner, while 57.2% of partners disclosed. In multivariate analysis, meeting a partner on the internet or chat line was associated with serodiscordant/serostatus unknown UAI during last sex among HIV-infected men. The only factor associated with serodiscordant/serostatus unknown UAI during last sex among HIV-uninfected men was the partner being a non-main partner. Conclusions: A significant proportion of black MSM in this study did not disclose their HIV status. Our data highlight the need for more data on dyadic variables and sexual risk behaviors among black MSM, as well as interventions to encourage communication between partners.


Aids Education and Prevention | 2012

Perceived Peer Safer Sex Norms and Sexual Risk Behaviors Among Substance-Using Latino Adolescents

Farzana Kapadia; Victoria Frye; Sebastian Bonner; Patricia Emmanuel; Cathryn L. Samples; Mary H. Latka

We investigated the association between perceived peer norms and safer sexual behaviors among substance using Latino youth. Between 2005 and 2006, cross-sectional data were collected from 92 Latino adolescents recruited from clinic- and community-based settings in two U.S. cities. Separate multivariate logistic regression models were used to assess the relationship between perceived peer norms around safer sex and two different outcomes: consistent condom use and multiple sexual partnerships. Among these participants, perceived peer norms encouraging safer sex were associated with consistent condom use even after controlling for individual- and partner-related factors. Perceived peer norms supporting safer sex were inversely associated with recently having two or more sexual partners after controlling for demographic characteristics. Perceived peer norms around safer sexual behavior contribute to a lower likelihood of engaging in two HIV/STI risk behaviors: inconsistent condom use and multiple partnering. These findings suggest that further development of peer-based interventions for Latino youth is warranted.


Journal of Hepatology | 2011

Predictors and effects of alcohol use on liver function among young HCV-infected injection drug users in a behavioral intervention

Lydia N. Drumright; Holly Hagan; David L. Thomas; Mary H. Latka; Elizabeth T. Golub; Richard S. Garfein; John D. Clapp; Jennifer V. Campbell; Sebastian Bonner; Farzana Kapadia; Thelma Thiel; Steffanie A. Strathdee

BACKGROUND & AIMS Hepatitis C virus (HCV) screening can provide opportunities to reduce disease progression through counseling against alcohol use, but empirical data on this issue are sparse. We determined the efficacy of a behavioral intervention in reducing alcohol use among young, HCV-infected injection drug users (IDUs) (n=355) and assessed whether changes in liver enzymes were associated with changes in alcohol consumption. METHODS Both the intervention and attention-control groups were counseled to avoid alcohol use, but the intervention group received enhanced counseling. Logistic regression, ANOVA, and continuous time Markov models were used to identify factors associated with alcohol use, changes in mean ALT and AST levels, and change in alcohol use post-intervention. RESULTS Six months post-intervention, alcohol abstinence increased 22.7% in both groups, with no difference by intervention arm. Transition from alcohol use to abstinence was associated with a decrease in liver enzymes, with a marginally greater decrease in the intervention group (p=0.05 for ALT; p=0.06 for AST). In multivariate Markov models, those who used marijuana transitioned from alcohol abstinence to consumption more rapidly than non-users (RR=3.11); those who were homeless transitioned more slowly to alcohol abstinence (RR=0.47); and those who had ever received a clinical diagnosis of liver disease transitioned more rapidly to abstinence (RR=1.88). CONCLUSIONS Although, behavioral counseling to reduce alcohol consumption among HCV-infected IDUs had a modest effect, reductions in alcohol consumption were associated with marked improvements in liver function. Interventions to reduce alcohol use among HCV-infected IDUs may benefit from being integrated into clinical care and monitoring of HCV infection.


Journal of Urban Health-bulletin of The New York Academy of Medicine | 2006

Self-Reported Moisture or Mildew in the Homes of Head Start Children with Asthma is Associated with Greater Asthma Morbidity

Sebastian Bonner; Thomas Matte; Joanne Fagan; Evie Andreopoulos; David Evans

This study used results from a cross-sectional survey of parents of 3- to 5-year-old children with asthma to assess the frequency of self-reported home environmental conditions that could contribute to worsening asthma and examined the relationship between these factors and the childs asthma morbidity. Participants were 149 parents drawn from the two largest agencies that provide subsidized preschool childcare services in East and Central Harlem, inner-city communities with high prevalence of asthma. The sample represented 77% of eligibles determined by a validated case-identification instrument. Data were collected on demographics, symptoms, medication use, Emergency Department visits and hospitalization, and environmental conditions in the home. One or more of these home environmental conditions were reported by 92% of participants. Controlling for other environmental conditions and demographics, associations were found between self-reported presence of moisture or mildew on ceilings, walls, or windows and higher frequency of hospitalizations for breathing-related problems (OR = 3.31; 95% CI 1.62–6.75), frequent episodes of wheezing (OR = 3.25; 95% CI 1.8–6.0), and higher frequency of night symptoms due to asthma (OR = 2.19; 95% CI 1.4–3.41). Having a carpet or rug in the childs bedroom or the living room was also associated with hospitalizations (OR = 3.23; 95% CI 1.53–6.8), and male gender was marginally associated with the frequency of night symptoms (OR = 1.51; 95% CI .95–2.4). Asthma is prevalent in the Head Start population, and exposure to home environmental conditions that may worsen asthma is common in the socially disadvantaged populations served by Head Start programs.


Aids Care-psychological and Socio-medical Aspects of Aids\/hiv | 2012

Sociodemographic and Risk Behavior Characteristics Associated with Unprotected Sex with Women among Black Men Who Have Sex with Men and Women in New York City

Hong-Van Tieu; Pilgrim Spikes; Jocelyn Patterson; Sebastian Bonner; James E. Egan; Krista Goodman; Kiwan Stewart; Victoria Frye; Guozhen Xu; Donald R. Hoover; Beryl A. Koblin

Abstract The objectives of this cross-sectional study were to compare sociodemographic and risk behavior characteristics between black men who have sex with both men and women (MSMW) and those who have sex with men only (MSMO) and assess factors associated with having any unprotected vaginal and/or anal intercourse (UVAI) with women in the last 3 months. Data from 326 black men who reported recent unprotected anal intercourse with a man in an HIV behavioral intervention study in New York City were analyzed. Baseline characteristics were compared between MSMW and MSMO, and factors associated with having any UVAI in the past 3 months with women among MSMW were evaluated. In total, 26.8% reported having sex with both men and women in the last 3 months. MSMW were less likely to be HIV infected, use amyl nitrates, and have unprotected receptive anal sex with most recent male partner. MSMW were more likely to be over 40 years old and use heroin. A total of 55.6% of MSMW reported having UVAI with women in the last 3 months. Compared to MSMW having only protected sex, MSMW having any UVAI with women were less likely to be HIV infected and to disclose having sex with men to female partners; they were more likely to have greater than four male sex partners in the last 3 months. In conclusion, HIV prevention interventions among black MSMW should directly address the risk of HIV transmission to both their female and male partners. Disclosure of bisexuality to female partners may be an important component of future prevention efforts.


Journal of Acquired Immune Deficiency Syndromes | 2011

Condom-use decision making in the context of hypothetical pre-exposure prophylaxis efficacy among substance-using men who have sex with men: Project MIX.

Beryl A. Koblin; Gordon Mansergh; Frye; Tieu Hv; Donald R. Hoover; Sebastian Bonner; Stephen A. Flores; Sharon M. Hudson; Grant Colfax; Mix Study Team

ObjectiveTo examine condom-use decision making in the context of hypothetical pre-exposure prophylaxsis (PrEP) efficacy among men who have sex with men who use alcohol and other substances during sex. MethodsSubstance-using men who have sex with men were recruited in 4 US cities for a behavioral intervention trial. Three groups were defined as follows: men who indicated that to not use a condom for receptive/insertive unprotected anal intercourse (UAI) while using PrEP, PrEP would need to be: (1) “almost always or always” effective (high efficacy); (2) effective “at least half the time or more but not almost always or always” (mid-range efficacy corresponding to recent PrEP trial results); (3) effective “less than half the time” (low efficacy). The mid-range efficacy group was compared with the low-efficacy group (as the reference) and to the-high efficacy group (as the reference). ResultsAmong 630 men who never used PrEP, 15.2% were in the mid-range efficacy group for receptive UAI and 34.1% in the mid-range efficacy group for insertive UAI. Scores on difficulty communicating about safer sex while high were significantly higher in the mid-range efficacy group compared with each of the other groups for both receptive and insertive UAI. Men who seemed to be differentiating PrEP use by anal sex role also scored higher on communication difficulties, although scoring lower on condom intentions. ConclusionsCommunication about safer sex while under the influence of alcohol or other substances and condom intentions are important factors to consider for HIV prevention interventions for PrEP users.

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Barry J. Zimmerman

City University of New York

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Mary H. Latka

New York Academy of Medicine

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Victoria Frye

City University of New York

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James E. Egan

University of Pittsburgh

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