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Featured researches published by Celine M. Ko.


Supportive Care in Cancer | 2005

Problem-solving and distress in prostate cancer patients and their spousal caregivers

Celine M. Ko; Vanessa L. Malcarne; James W. Varni; Scott C. Roesch; Rajni Banthia; Helen L. Greenbergs; Georgia Robins Sadler

Goals of workProstate cancer, the most common life-threatening cancer among American men, increases risk of psychosocial distress and negatively impacts quality of life for both patients and their spouses. To date, most studies have examined the relationship between patient coping and distress; however, it is also likely that what the spouse does to cope, and ultimately how the spouse adjusts, will affect the patient’s adjustment and quality of life. The present study examined the relationships of spouse problem-solving coping, distress levels and patient distress in the context of prostate cancer. The following mediational model was tested: Spouses’ problem-solving coping will be significantly inversely related to patients’ levels of distress, but this relationship will be mediated by spouses’ distress levels.Patients and methodsOne hundred seventy-one patients with prostate cancer and their spousal caregivers were assessed for mood; spouses were assessed for problem-solving coping skills. Structural equation modeling was used to test model fit.Main resultsThe model tested was a good fit to the data. Dysfunctional spousal problem-solving was a significant predictor of spouse distress level but constructive problem-solving was not. Spouse distress was significantly related to patient distress. Spouse dysfunctional problem-solving predicted patient distress, but this relationship was mediated by spouse distress. The same mediational relationship did not hold true for constructive problem-solving.ConclusionsSpouse distress mediates the relationship between spouse dysfunctional coping and patient distress. Problem-solving interventions and supportive care for spouses of men with prostate cancer may impact not only spouses but the patients as well.


Psychology & Health | 2009

Fatigued breast cancer survivors: the role of sleep quality, depressed mood, stage and age.

Rajni Banthia; Vanessa L. Malcarne; Celine M. Ko; James W. Varni; Georgia Robins Sadler

Cancer-related fatigue is associated with lower health-related quality of life and the majority of breast cancer survivors experience persistent fatigue after finishing treatment. The present study examines age, cancer stage, sleep quality and depressed mood as predictors of five dimensions of fatigue in 70 fatigued breast cancer survivors who no longer evidenced any signs of cancer and were finished with treatment. Discriminant function analyses were used to predict fatigue subgroup membership (higher, lower) from age, stage, mood and sleep for five subtypes: General, Mental, Emotional, and Physical fatigue, and Vigour. Significant discriminant functions were found for all subtypes. Findings suggest that age, staging, mood and sleep are all important predictors, but there are differential relationships when subtypes of fatigue are considered. Given current limitations in treating fatigue directly, interventions targeting mood and sleep should be considered as alternate approaches to reduce fatigue.


Journal of Affective Disorders | 2013

Psychometric properties of Positive and Negative Affect Schedule (PANAS) original and short forms in an African American community sample

Erin L. Merz; Vanessa L. Malcarne; Scott C. Roesch; Celine M. Ko; Marc Emerson; Vincenzo G. Roma; Georgia Robins Sadler

BACKGROUND The Positive and Negative Affect Schedule (PANAS) has been widely used as a self-report measure of affect in community and clinical contexts. However, evaluations of the psychometric properties of PANAS scores have been limited in diverse ethnic groups. Several short forms of the PANAS have also been proposed, but very little is known about the psychometric properties of these versions. METHODS The present study investigated the psychometric properties, including the factor structure of the original PANAS and two short forms in an African American community sample (N=239). Descriptive, internal consistency reliability, factorial validity, and measurement invariance analyses were conducted. RESULTS All PANAS subscales from the original and short forms had adequate internal consistency. For the original PANAS, the model specifying three correlated factors (Positive Affect, Afraid, Upset) with correlated uniquenesses from redundant items provided the best fit to the data. However, the two-factor model (Positive Affect, Negative Affect) with correlated uniquenesses was also supported. For both short forms, the two-factor model with correlated uniquenesses fit the data best. Factors from all forms were generally invariant across age and gender, although there was some minor invariance at the item level. LIMITATIONS Participants were from a limited geographic area and one ethnic group. Indicators of anxiety, depression, and cultural characteristics were not measured. CONCLUSION The factor structure was replicated, suggesting no immediate concerns regarding the valid interpretation of PANAS scores. The results support the reliability and validity of the PANAS and its short forms for use among African Americans.


Psychology & Health | 2011

Dyadic concordance among prostate cancer patients and their partners and health-related quality of life: Does it matter?

Erin L. Merz; Vanessa L. Malcarne; Celine M. Ko; Melody S. Sadler; Lisa Kwack; James W. Varni; Georgia Robins Sadler

Serious and chronic illnesses occur within a family context, affecting not only the patient but also the spouse/partner, children and extended family network. Spouses/partners are likely to experience the greatest personal impact, and may influence patient adjustment. Also, the intimate relationship may be affected by the illness experience. This study examined whether dyadic concordance on the characteristics of prostate cancer (PC) was related to health-related quality of life (HRQOL), psychological distress and marital adjustment in PC patients and their female partners. Couples (N = 164) completed questionnaires on the appraisals of PC, and individual and dyadic adjustment. Patient and partner PC appraisal ratings were positively correlated. There was a general pattern of patients and partners in concordant dyads, versus those in dyads in which spouses maximised or minimised PC characteristics, reporting significantly better individual HRQOL outcomes, although there were several exceptions. Patient–partner appraisal (dis)agreement generally did not significantly predict dyadic adjustment. Overall, results suggest that dyadic disagreement is associated with worse HRQOL in couples facing PC.


Journal of The National Medical Association | 2011

A Cluster Randomized Controlled Trial to Increase Breast Cancer Screening Among African American Women: The Black Cosmetologists Promoting Health Program

Georgia Robins Sadler; Celine M. Ko; Phillis Wu; Jennifer Alisangco; Sheila F. Castañeda; Colleen Kelly

BACKGROUND African American women have disproportionately higher rates of breast cancer mortality than all other ethnic groups, thus highlighting the importance of promoting early detection. METHODS African American women (N = 984) from San Diego, California, participated in a randomized controlled trial testing the efficacy of breast cancer education sessions offered in beauty salons. Cosmetologists received ongoing support, training, and additional culturally aligned educational materials to help them engage their clients in dialogues about the importance of breast cancer early detection. Posters and literature about breast cancer early detection were displayed throughout the salons and cosmetologists used synthetic breast models to show their clients how breast cancer lumps might feel. Participants in the control group received a comparable diabetes education program. Baseline and 6-month follow-up surveys were administered to evaluate changes in womens breast cancer knowledge, attitudes, and screening behaviors. RESULTS This intervention was well received by the participants and their cosmetologists and did not interfere with or prolong the clients salon visit. Women in the intervention group reported significantly higher rates of mammography compared to women in the control group. Training a single educator proved sufficient to permeate the entire salon with the health message, and salon clients agreed that cosmetologists could become effective health educators. CONCLUSIONS Cosmetologists are in an ideal position to increase African American womens breast cancer knowledge and adherence to breast cancer screening guidelines.


Journal of Behavioral Medicine | 2006

Correspondence Between Daily and Weekly Fatigue Reports in Breast Cancer Survivors

Rajni Banthia; Vanessa L. Malcarne; Scott C. Roesch; Celine M. Ko; Helen L. Greenbergs; James W. Varni; Georgia Robins Sadler

Fatigue is a contributor to decreased quality of life and one of the most common symptoms reported by cancer survivors. Most assessment of fatigue has been retrospective and/or unidimensional. Single-item visual analogue scale ratings are commonly used, despite arguments that fatigue is better conceptualized as multidimensional. The relationships of daily to weekly ratings of fatigue, or of unidimensional to multidimensional assessments, have not been explored. Twenty-five breast cancer survivors provided daily ratings of fatigue and completed the Multidimensional Fatigue Symptom Inventory-Short Form weekly for one month. Using hierarchical linear modeling, stronger relationships of weekly ratings to average and peak rather than most recent daily ratings were found. Visual analogue scale ratings shared more variance with the General Fatigue subscale than with the other four fatigue dimensions measured. Findings suggest that different information is captured by daily versus weekly reports, and that although visual analogue scale ratings can provide a quick assessment of general fatigue, they do not capture other important dimensions.


BMC Public Health | 2006

Cardiovascular risk factors among Chamorros

Binh Chiem; Victoria Nguyen; Phillis Wu; Celine M. Ko; Lee Ann Cruz; Georgia Robins Sadler

BackgroundLittle is known regarding the cardiovascular disease risk factors among Chamorros residing in the United States.MethodsThe Chamorro Directory International and the CDCs Behavioral Risk Factor Surveillance System Questionnaire (BRFSS) were used to assess the health related practices and needs of a random sample of 228 Chamorros.ResultsInactivity, hypertension, elevated cholesterol and diabetes mellitus were more prevalent in this Chamorro sample compared to the US average. Participants who were 50-and-older or unemployed were more likely to report hypertension, diabetes and inactivity, but they were also more likely to consume more fruits and vegetables than their younger and employed counterparts. Women were more likely to report hypertension and diabetes, whereas men were more likely to have elevated BMI and to have never had their blood cholesterol checked.ConclusionThe study provides data that will help healthcare providers, public health workers and community leaders identify where to focus their health improvement efforts for Chamorros and create culturally competent programs to promote health in this community.


Contemporary Clinical Trials | 2010

Increasing Asian American women's research participation: The Asian grocery store-based cancer education program

Georgia Robins Sadler; Celine M. Ko; Mitsuko Takahashi; Christy R. Ching; Irene Lee; Gin C. Chuang; Kathy Lee

BACKGROUND Research study participants with diverse characteristics produce the most generalizable outcomes, but recruiting heterogeneous samples is difficult. METHODS This pilot study tests whether Asian women (N=1079) with diverse language proficiencies, who were personally recruited to one study by a linguistically and culturally aligned recruiter, would enroll in another study with a single mailed invitation in English. RESULTS The 134 participants in the second study represented 17.2% of those 779 women who had completed both baseline and follow-up surveys in the original study, making this characteristic the best predictor of future study participation. Of the 303 women in the first study who said they would be willing to participate in future studies, 17% (51) participated in the second study. Of the 733 who said they would not be willing to participate in future studies, 11% (83) participated. However, given the larger size of this group, researchers may recruit a greater absolute number of participants from it. While this rate of participation was less than the 25% rate achieved in the first study, the second studys single, mailed English language invitation was likely a barrier to participation. CONCLUSION Securing IRB-approval to invite prior study participants from traditionally underrepresented communities to a new study is a strategy investigators can use to increase the diversity of their samples. Further research is warranted to determine whether Asian women who have participated in one study might also become effective recruiters for future studies.


Journal of communication in healthcare | 2014

Lessons learned from The Black Cosmetologists Promoting Health Program: A randomized controlled trial testing a diabetes education program

Georgia Robins Sadler; Celine M. Ko; Phillis Wu; Philip Ngai

Abstract Purpose Diabetes is reaching epidemic proportions in the United States and African Americans are at greater risk than most. Disparities in the incidence of diabetes place African American women at a much higher risk than their white counterparts. As such, the purpose of this study was to evaluate a community-based educational intervention program aimed at changing diabetes attitudes, knowledge, and screening behaviors of African American women via cosmetologists trained as community health educators. Methods Twenty African American cosmetologists joined the Black Cosmetologist Promoting Health Program. Their salons were randomized to disseminate diabetes or breast cancer information and given educational materials to display in their salons and give to their clients. Their clients (n = 984 women) consented to help evaluate the program, completing a baseline and 6-month follow-up survey regarding their knowledge, attitudes, and behaviors related to diabetes and breast cancer. Results At the 6-month follow-up, self-reported knowledge about diabetes increased across both groups. However, despite similar programmatic structure offered to the two groups, there were no significant differences in diabetes knowledge, attitudes, and screening at follow-up. Conclusion This non-significant outcome contrasted with the positive outcomes achieved by the parallel breast cancer program. Gladwells Tipping Point theory could explain the different outcomes. The programs differed in message content, messaging tone, and the environment in which the messages were delivered. The diabetes program lacked a clear, memorable, and upbeat call-to-action and an environment that socially and financially supported the uptake of the recommended actions.


Journal of Behavioral Medicine | 2003

The Effects of Dyadic Strength and Coping Styles on Psychological Distress in Couples Faced with Prostate Cancer

Rajni Banthia; Vanessa L. Malcarne; James W. Varni; Celine M. Ko; Georgia Robins Sadler; Helen L. Greenbergs

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Rajni Banthia

San Diego State University

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Phillis Wu

University of California

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Scott C. Roesch

San Diego State University

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Erin L. Merz

San Diego State University

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Binh Chiem

University of California

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