Prioritized Post-Discharge Telephonic Outreach Reduces Hospital Readmissions for Select High-Risk Patients

Published Online: December 18, 2012
L. Doug Melton, PhD, MPH; Charles Foreman, MD; Eileen Scott, RN; Matthew McGinnis, BS; and Michael Cousins, PhD
Objectives: To determine if post-discharge telephonic case management (CM) reduces emergent hospital readmissions for select high-risk patients.

Study Design: Prospective, randomized.

Methods: We conducted a prospective, randomized control study of the effect of hospital discharge planning from health plan telephonic case managers on readmissions for high-risk patients. High risk was defined as having an initial discharge major diagnosis of gastrointestinal, heart, or lower respiratory and length of stay of 3 days or more. The intervention group (N = 1994) received telephonic outreach and engagement within 24 hours of discharge and their calls were made in descending risk order to engage the highest risk first. The control group (N = 1994) received delayed telephonic outreach and engagement 48 hours after discharge notification and no call order by risk was applied. Comparison groups had statistically equivalent characteristics at baseline (P >.05).

Results: The intent-to-treat 60-day readmission rate for the treatment group was 7.4% versus 9.6% for the control group (P = .01), representing a 22% relative reduction in all-cause readmissions. Two post hoc assessments were conducted to identify potential mechanisms of action for this effect and showed that the treatment group had more physician visits and prescription drug fills following initial discharge.

Conclusions: Telephonic CM reduces the likelihood of 60-day readmissions for select high-risk patients. This study suggests that prioritizing telephonic outreach to a select group of highrisk patients based on their discharge date and risk severity is an effective case management strategy. Future studies should explore patients’ activity beyond phone calls to further explain the mechanism for readmission reduction.

(Am J Manag Care. 2012;18(12):838-844)
Readmissions make up a significant portion of healthcare expenditures and account for 30% of total inpatient cost in the commercial population.1 The Agency for Healthcare Research and Quality stated that roughly 1 in 10 readmissions in 2008 could have been prevented if acute conditions were managed properly post discharge.2

Prior published studies testing the impact of post-discharge outreach on readmission reductions have shown success with select interventions such as Telehealth video consultations with an in-person health practitioner3 and house calls.4,5 In comparison, the evidence is mixed for the effectiveness of case management (CM) that is not in person.6-8 Riegel and colleagues tested the effect of telephonic CM for heart failure patients’ resource use and found the intervention group had 36% lower heart failure readmissions at 3 months than controls (P <.05). In contrast, Laramee tested the effect of telephonic CM paired with early discharge planning for congestive heart failure patients on readmission, but found 90-day readmission rates were equal for the CM and usual care groups. Neither of these studies focused solely on the impact of CM on the commercially insured. To date, there is only 1 published prospective, stratified randomized study assessing the impact of telephonic CM on readmissions within a large, commercially insured population, and it showed a 10% readmission reduction.9

The study objective was to determine if a telephonic CM patientprioritization protocol for recently discharged high-risk patients with select acute conditions reduced all-cause readmissions. We conducted a prospective, stratified randomized study to test the effectiveness of prioritized telephonic CM within a large, commercially insured population. This is the second study to assess a telephonic CM readmission reduction intervention on a large, commercially insured population.9



All study patients had active private health insurance coverage from the same carrier and were eligible for the same carrier’s CM during the study period between July 1, 2010, and December 31, 2010. All study patients had a 3-day or greater length of stay and an International Classification of Diseases, Ninth Revision, Clinical Modification (ICD- 9-CM) major diagnosis of Heart/Circulatory (ICD-9-CM Major Group CD = 12), Lower Respiratory (ICD-9- CM Major Group CD = 11), or Gastrointestinal (ICD-9-CM Major Group CD = 13) at initial discharge. All major diagnoses were considered, but the 3 major diagnosis categories and 3-day or more length of stay were the inclusion criteria because a previous internal retrospective study revealed those characteristics were most associated with 30-day and 60-day readmissions.10 Discharges were from all 50 states except for Texas and California because those states had existing readmission reduction pilots during the study.

Study Design

The intervention group was labeled as the prioritized group. The prioritized group received 2 attempted postdischarge phone calls by a case manger within 24 hours of discharge notification. If the prioritized patient was not contacted within 24 hours, then a second attempted call occurred the following day. All attempted calls to the prioritized group were made in descending health risk order (as defined by the Episodic Risk Group [ERG] score) so that outreach was first administered to patients with the greatest likelihood of readmission due to poorer health status. The control group was labeled as the unprioritized group. The unprioritized group received an attempted call by a case manager 3 days after discharge and the unprioritized group calls were not made in any health risk order. If the unprioritized patient was not contacted on day 3, then a second attempted call occurred the following day. If after multiple calls the patient was still not contacted, an Unable to Contact letter was mailed to the patient stating the contact attempts and to return a call.

We created a Call List Flow Chart using 3 days of discharges (ie, 1/3/11 to 1/15/11) to demonstrate the prioritization logic overtime for patients contacted and not contacted (eAppendix A, available at www.ajmc.com). The prioritized patients represent the first half of the call order list receiving initial phone calls in descending risk order within 1 day of discharge, whereas the unprioritized patients represent the second half of the call order list receiving their initial phone call 3 days after discharge and these calls were made in no risk order. One long list was created daily to make the CMs unaware of patient assignment. To further preserve the blinding, 2 CMs for telephonic outreach were scheduled from 8 AM to 5 PM and then 2 different CMs between 5 PM and 9 PM. A total of 86 designated case managers supported the pilot.

The same post-discharge telephonic script (eAppendix B) was provided to the comparison groups. The script’s questions focused on 3 areas: (1) post-discharge understanding of medication, (2) post-discharge care management orders, and (3) scheduling of follow-up visits. An engaged conversation was defined as CM receiving a response to every question. CM phone calls resulting in an unanswered call, voice mail, dropped call, or partial completion of the scripted questions were classified as not engaged. We assumed most participants had an active phone number since the field is a part of annual enrollment information.

PDF is available on the last page.

Issue: December 2012
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