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Dive into the research topics where Chun Nok Lam is active.

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Featured researches published by Chun Nok Lam.


Annals of Emergency Medicine | 2014

Trial to Examine Text Message–Based mHealth in Emergency Department Patients With Diabetes (TExT-MED): A Randomized Controlled Trial

Sanjay Arora; Anne L. Peters; E. Burner; Chun Nok Lam; Michael Menchine

STUDY OBJECTIVE Increasingly, low-income inner-city patients with diabetes utilize emergency departments (EDs) for acute and chronic care. We seek to determine whether a scalable, low-cost, unidirectional, text message-based mobile health intervention (TExT-MED) improves clinical outcomes, increases healthy behaviors, and decreases ED utilization in a safety net population. METHODS We conducted an randomized controlled trial of 128 adult patients with poorly controlled diabetes (glycosylated hemoglobin [Hb A1C] level ≥8%) in an urban, public ED. The TExT-MED group received 2 daily text messages for 6 months in English or Spanish. The primary outcome was change in Hb A1C level. Secondary outcomes included changes in medication adherence, self-efficacy, performance of self-care tasks, quality of life, diabetes-specific knowledge, ED utilization, and patient satisfaction. RESULTS Hb A1C level decreased by 1.05% in the TExT-MED group compared with 0.60% in the controls (Δ0.45; 95% confidence interval [CI] -0.27 to 1.17) at 6 months. Secondary outcomes favored the TExT-MED group, with the most sizable change observed in self-reported medication adherence (as measured by the Morisky Medication Adherence Scale, an 8-point validated scale with higher scores representing better adherence), which improved from 4.5 to 5.4 in the TExT-MED group compared with a net decrease of -0.1 in the controls (Δ1.1 [95% CI 0.1 to 2.1]). Effects were larger among Spanish speakers for both medication adherence (1.1 versus -0.3; Δ1.4; 95% CI 0.2 to 2.7) and Hb A1C (-1.2% versus -0.4%) in the TExT-MED group. The proportion of patients who used emergency services trended lower in the TExT-MED group (35.9% versus 51.6%; Δ15.7%; 95% CI 9.4% to 22%). Overall, 93.6% of respondents enjoyed TExT-MED and 100% would recommend it to family/friends. CONCLUSION The TExT-MED program did not result in a statistically significant improvement in Hb A1C. However, trends toward improvement in the primary outcome of Hb A1C and other secondary outcomes, including quality of life, were observed, the most pronounced being improved medication adherence. TExT-MED also decreased ED utilization. These findings were magnified in the Spanish-speaking subgroup. Technologies such as TExT-MED represent highly scalable, low-cost, and widely accessible solutions for safety-net ED populations.


Academic Emergency Medicine | 2015

Improving attendance at post-emergency department follow-up via automated text message appointment reminders: a randomized controlled trial.

Sanjay Arora; E. Burner; S. Terp; Chun Nok Lam; Aren Nercisian; Vivek Bhatt; Michael Menchine

OBJECTIVES Patients discharged from the emergency department (ED) are often referred for primary care, specialty, or other disease-specific follow-up appointments. Attendance at these scheduled follow-up appointments has been found to improve patient outcomes, decrease ED bounce-backs, and reduce malpractice risk. Reasons for missing follow-up visits are complex, but the most commonly reason cited by patients is simply forgetting. In this study the authors evaluated the ability of an automated text message reminder system to increase attendance at post-ED discharge follow-up appointments in a predominantly Hispanic safety-net population. METHODS This was a randomized controlled trial of ED patients with outpatient follow-up visits scheduled at the time of ED discharge. A total of 374 English- and Spanish-speaking patients with text-capable mobile phones were enrolled. Patients in the intervention arm received automated, personalized text message appointment reminders including date, time, and clinic location at 7, 3, and 1 day before scheduled visits. A t-test of proportions was used to compare outcomes between intervention and control groups. Both an intention-to-treat (ITT) and a per-protocol analysis of the data were performed. The ITT more accurately reflects real-world conditions where errors such as number entry errors are bound to occur. The per-protocol analysis adds value by isolating the effect of the intervention by comparing patients who actually received it compared with those who did not. RESULTS In the per-protocol analysis of the primary outcome, the overall appointment adherence rate was 72.6% in the intervention group compared with 62.1% in the control group (difference between groups = 10.5%, 95% confidence interval [CI] = 0.3% to 20.8%; p = 0.045; number needed to treat = 9.5). In the ITT analysis, the overall appointment attendance rate 70.2% in the intervention group compared with 62.1% in the control group (difference between groups = 8.2%; 95% CI = -1.6% to 17.7%; p = 0.100). In a secondary largely exploratory analysis, the intervention was found to have the most benefit in patients with the lowest baseline follow-up rate (English speakers with specialty care appointments). CONCLUSIONS Automated text message appointment reminders resulted in improvement in attendance at scheduled post-ED discharge outpatient follow-up visits and represent a low-cost and highly scalable solution to increase attendance at post-ED follow-up appointments, which should be further explored in larger sample sizes and diverse patient populations.


Journal of Emergency Medicine | 2014

Is medical clearance necessary for pediatric psychiatric patients

Genevieve Santillanes; Joy Joelle Donofrio; Chun Nok Lam; Ilene Claudius

BACKGROUND Although most studies have found low rates of organic illness in patients with isolated psychiatric complaints, psychiatric patients are frequently brought to emergency departments (EDs) for medical clearance. STUDY OBJECTIVES To assess the utility of ED medical clearance before transfer of pediatric patients on psychiatric holds to inpatient psychiatric facilities, and to evaluate charges associated with ED medical clearance. METHODS Retrospective study of pediatric psychiatric patients in one urban pediatric ED with 22,000 annual patient visits over an 18-month period. Patients were included if transported to the ED for medical clearance after being placed on an involuntary psychiatric hold in the prehospital setting. Main outcome measures were charges for screening laboratory tests and secondary ambulance transfers and wages for sitters resulting from ED visits for medical screening examinations of patients on psychiatric holds. We also determined what percentage of patients truly warranted a medical screen and the percentage of psychiatric holds overturned, avoiding transfer to a psychiatric hospital. RESULTS There were 789 patients included; 72 (9.1%) were determined to require medical screening. Total charges for laboratory assessments and secondary ambulance transfers and wages for sitters were


Hospital pediatrics | 2014

Impact of Boarding Pediatric Psychiatric Patients on a Medical Ward

Ilene Claudius; J. Joelle Donofrio; Chun Nok Lam; Genevieve Santillanes

1,241,295, or US


Western Journal of Emergency Medicine | 2016

Increased 30-Day Emergency Department Revisits Among Homeless Patients with Mental Health Conditions

Chun Nok Lam; Sanjay Arora; Michael Menchine

17,240 per patient requiring a medical screen. Only 35 (4.4%) holds were overturned in the ED. CONCLUSION Few patients brought to the ED on an involuntary hold required a medical screen. Use of basic criteria in the prehospital setting to determine who required a medical screen (altered mental status, ingestion, hanging, traumatic injury, unrelated medical complaint, rape) could have led to significant savings.


Journal of the American Medical Informatics Association | 2016

Describing the evolution of mobile technology usage for Latino patients and comparing findings to national mHealth estimates

Sanjay Arora; K. Ford; S. Terp; Tiffany Abramson; Ryan Ruiz; Marissa Camilon; Christopher J. Coyne; Chun Nok Lam; Michael Menchine; E. Burner

BACKGROUND AND OBJECTIVES Psychiatric disorders account for an increasing number of pediatric hospitalizations. Due to lack of psychiatric beds, patients on involuntary psychiatric holds may be admitted to medical units. Our objectives were to evaluate the rate of admission of psychiatric patients to a medical unit, psychiatric care provided, and estimated cost of care. METHODS The study involved retrospective chart review of all patients on involuntary psychiatric holds presenting to 1 pediatric emergency department from July 2009 to December 2010. We determined the rate of admission to a medical unit, the rate of counseling or psychiatric medication administration, and the estimated cost of nonmedical admissions (boarding) of patients on the medical unit. RESULTS A total of 555 (50.1%) of 1108 patients on involuntary psychiatric holds were admitted to the pediatric medical unit. The majority (523 [94.2%]) were admitted for boarding because no psychiatric bed was available. Thirty-two (6.1%) patients admitted for isolated psychiatric reasons had counseling documented, and 105 (20.1%) received psychiatric medications. Patients admitted to an affiliated psychiatric hospital were significantly more likely to receive counseling and medications. Psychiatric patients were boarded in medical beds for 1169 days at an estimated cost of


Annals of Emergency Medicine | 2017

Enforcement of the Emergency Medical Treatment and Labor Act, 2005 to 2014

S. Terp; Seth A. Seabury; Sanjay Arora; Andrew Eads; Chun Nok Lam; Michael Menchine

2 232 790 or


American Journal of Emergency Medicine | 2015

Do emergency pediatric psychiatric visits for danger to self or others correspond to times of school attendance

Collin Lueck; Liza Kearl; Chun Nok Lam; Ilene Claudius

4269 per patient over the 18-month period. CONCLUSIONS We found high admission rates of patients on involuntary psychiatric holds to a pediatric medical unit with little psychiatric treatment in 1 hospital. Further research in other centers is required to determine the extent of the issue. Future studies of longer term outcomes (including readmission rates and assessments of functioning) are needed.


Ethnicity & Disease | 2017

Exposure to and Use of Electronic Cigarettes: Does Language Matter?

Paul Wada; Chun Nok Lam; E. Burner; S. Terp; Michael Menchine; Sanjay Arora

Introduction Patients with mental health conditions frequently use emergency medical services. Many suffer from substance use and homelessness. If they use the emergency department (ED) as their primary source of care, potentially preventable frequent ED revisits and hospital readmissions can worsen an already crowded healthcare system. However, the magnitude to which homelessness affects health service utilization among patients with mental health conditions remains unclear in the medical community. This study assessed the impact of homelessness on 30-day ED revisits and hospital readmissions among patients presenting with mental health conditions in an urban, safety-net hospital. Methods We conducted a secondary analysis of administrative data on all adult ED visits in 2012 in an urban safety-net hospital. Patient demographics, mental health status, homelessness, insurance coverage, level of acuity, and ED disposition per ED visit were analyzed using multilevel modeling to control for multiple visits nested within patients. We performed multivariate logistic regressions to evaluate if homelessness moderated the likelihood of mental health patients’ 30-day ED revisits and hospital readmissions. Results Study included 139,414 adult ED visits from 92,307 unique patients (43.5±15.1 years, 51.3% male, 68.2% Hispanic/Latino). Nearly 8% of patients presented with mental health conditions, while 4.6% were homeless at any time during the study period. Among patients with mental health conditions, being homeless contributed to an additional 28.0% increase in likelihood (4.28 to 5.48 odds) of 30-day ED revisits and 38.2% increase in likelihood (2.04 to 2.82 odds) of hospital readmission, compared to non-homeless, non-mental health (NHNM) patients as the base category. Adjusted predicted probabilities showed that homeless patients presenting with mental health conditions have a 31.1% chance of returning to the ED within 30-day post discharge and a 3.7% chance of hospital readmission, compared to non-homeless patients presenting with mental health conditions (25.2%, 2.6%) and NHNM (7.7%, 1.5%). Conclusion Homeless patients presenting with mental health conditions were more likely to return to the ED within 30 days and to be readmitted to the hospital. Interventions providing housing might improve their overall care management and have the potential to reduce ED revisits and hospital readmissions.


Pediatric Emergency Care | 2014

Treating psychiatric emergencies in incarcerated minors in the emergency department: what is the cost and what is their disposition?

David Wood; Joy Joelle Donofrio; Genevieve Santillanes; Chun Nok Lam; Ilene Claudius

OBJECTIVES Describe the change in mobile technology used by an urban Latino population between 2011 and 2014, and compare findings with national estimates. MATERIALS AND METHODS Patients were surveyed on medical history and mobile technology use. We analyzed specific areas of mobile health capacity stratified by chronic disease, age, language preference, and educational attainment. RESULTS Of 2144 Latino patients, the percentage that owned a cell phone and texted were in-line with Pew estimates, but app usage was not. Patients with chronic disease had reduced access to mobile devices (P < .001) and lower use of mobile phone functionalities. DISCUSSION Prior research suggests that Latinos can access mHealth; however, we observed lower rates among Latino patients actively seeking heath care. CONCLUSION Published national estimates do not accurately reflect the mobile technology use of Latino patients served by our public safety-net facility. The difference is greater for older, less educated patients with chronic disease.

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Michael Menchine

University of Southern California

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Sanjay Arora

University of Southern California

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S. Terp

University of Southern California

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E. Burner

University of Southern California

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Ilene Claudius

University of Southern California

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Genevieve Santillanes

University of Southern California

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Seth A. Seabury

University of Southern California

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A. Tripp

University of Southern California

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J. Joelle Donofrio

University of Southern California

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