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Sepsis survivors monitoring and coordination in outpatient health care (SMOOTH): study protocol for a randomized controlled trial
Trials volume 15, Article number: 283 (2014)
Sepsis sequelae include critical illness polyneuropathy, myopathy, wasting, neurocognitive deficits, post-traumatic stress disorder, depression and chronic pain. Little is known howlong-term sequelae following hospital discharge are treated. The aim of our study is to determine the effect of a primary care-based, long-term program on health-related quality of life in sepsis survivors.
In a two-armed randomized multicenter interventional study, patients after sepsis (n = 290) will be assessed at 6, 12 and 24 months. Patients are eligible if severe sepsis or septic shock (ICD-10), at least two criteria of systemic inflammatory response syndrome (SIRS), at least one organ dysfunction and sufficient cognitive capacity are present. The intervention comprises 1) discharge management, 2) training of general practitioners and patients in evidence-based care for sepsis sequelae and 3) telephone monitoring of patients. At six months, we expect an improved primary outcome (health-related quality of life/SF-36) and improved secondary outcomes such as costs, mortality, clinical-, psycho-social- and process-of-care measures in the intervention group compared to the control group.
This study evaluates a primary care-based, long-term program for patients after severe sepsis. Study results may add evidence for improved sepsis care management. General practitioners may contribute efficiently to sepsis aftercare.
U1111-1119-6345. DRKS00000741, CCT-NAPN-20875 (25 February 2011).
Sepsis is a worldwide major health concern with increasing incidence . About 85,000 patients a year survive severe sepsis or septic shock [2, 3] in Germany. Main sepsis sequelae include critical illness polyneuropathy/myopathy, cognitive deficits and chronic pain, all symptoms of neuronal degeneration [4–7]. In addition, post-traumatic stress disorder (PTSD) and depression are prevalent after stress exposure in the intensive care unit (ICU) [8, 9].
Thus, the majority of sepsis survivors suffer from a considerable deficit in physical and psycho-social functions , showing a reduced health-related quality of life [11–13]. In addition to the individual burden, sepsis causes significant health economic costs, about four to seven billion Euro/year for Germany alone, including indirect costs due to loss-of-work .
At least, sepsis sequelae are considered to be generic for symptoms after critical illness in general , which is of even more clinical and socioeconomic relevance.
To improve care for long-term conditions, coordination of the fragmented process by structured interventions is effective . The British National Institute for Health and Clinical Excellence’s guideline Rehabilitation after critical illness states that ‘ evidence is often missing and only incorporates aftercare for up to three months’ . Based on a current systematic review, few follow-up interventions have been published . Of these, Hacking et al. observed functional improvement of amputations associated with sepsis by an intensive rehabilitation program . Jones et al. presented an increase of physical function in 126 critical illness patients who were provided a self-help manual for six months . A British pilot study of Jackson et al., with 21 critical care patients, showed a non-significant reduction of post-traumatic symptoms using an in-house, multifaceted telemedicine program . In contrast, a home-based rehabilitation program for eight weeks did not lead to better health-related quality of life or to better physical function in Australian critical illness patients . A nurse-based translational pilot program that incorporated case management for patients with chronic critical illness was not effective for clinical or psycho-social outcomes [21, 22].
After ICU care and hospital-based rehabilitation, most sepsis survivors receive aftercare from their primary care physician, as with most chronically ill patients. This setting is characterized by a long-lasting doctor-patient relationship, with all health services being coordinated . Primary care-based interventions to improve sepsis sequelae are still rare .
This study will evaluate the effects of a primary care-based intervention to improve aftercare for sepsis survivors.
Aim of the study
This study will evaluate whether health-related quality of life (SF-36) and further clinical, psycho-social, process-of-care outcomes and costs of sepsis survivors will be improved by a primary care-based, sepsis-specific aftercare program.
After six months, the intervention group will show an improved primary outcome (SF-36) compared to patients with usual care in the control group.
The study is a multicenter, prospective, two-armed randomized controlled trial. Since the intervention could compromise educational elements for primary care physicians and patients, we are not able to perform a blinded intervention. GPs are allocated only to one patient - either to the control or intervention group.
A wide range of effect sizes is found in comparable studies. Jackson et al.  reported that for executive functioning ability a Cohen’s d =1.1 Elliott et al.  reported that for the SF-36 physical and mental summary scores, Cohen’s d = 0.14/0.13, respectively. For our study, we assume a medium Cohen’s d = 0.5 for our primary outcome, which is between these ‘extreme values’.
With a statistical power of 90% and a significance level of 0.05, we need n = 172 patients at T2 for two-sided tests. Assuming a 40% drop-out rate  and 30% mortality , 290 patients are needed at T1.
Patients will be recruited from 20 ICUs in nine study centers across Germany (see Additional file 1). Eligible survivors of severe sepsis or septic shock are screened on a daily basis by ICU consultants and reported to the study team. Within one month after discharge from ICU, patients are contacted by a study physician and asked to participate in the study. For eligibility, a cognition test is performed . All patients are informed about the study course.
Within one month after discharge from ICU, the first data set (T1) is collected by the study nurse, including clinical and socio-demographic characteristics. At the same time, the liaison physician contacts the responsible general practitioner (GP) by telephone to ask for study participation.
Given the GP’s written consent, patients are randomized in the intervention versus control group with n = 145 patients per group. Randomization sequence is computer-generated and provided in a sealed opaque envelope.
Patients are eligible on the presence of severe sepsis or septic shock, as defined by the definitions of the German Sepsis Society . Two systemic inflammatory response syndrome (SIRS) criteria have to be completed and at least one organ dysfunction (see Additional file 2). Inclusion criteria are checked by the participating ICU doctors.
Furthermore, patients must be 18 years or older and capable of sufficient German language skills.
Patients are excluded from study participation due to insufficient German language skills, deafness, blindness or speech impairment. Furthermore, patients suffering from severe cognitive impairment are not eligible for study participation (determined by a telephone interview of cognitive status (TICS-M) ≤27 points) .
The intervention contains three main components:
Discharge management with structured information between inpatient and outpatient care in accordance with the transitional care model , which was shown to reduce costs and rehospitalization rates .
Training of GPs and patients in sepsis sequelae and evidence-based treatment options . A special focus lies on an effective self-management of patients, which improves health-related quality of life in post-intensive care patients .
Monthly telephone monitoring of patients through specifically designed telephone interviews is provided for 12 months regarding sepsis sequelae symptoms. Systematic monitoring improves the physician-patient interaction and supplies relevant information on patient clinical status to the GP, according to the chronic care model [32, 33].The intervention is delivered by a study center-based case manager and a liaison physician (see Figure 1). The case manager is a nurse by qualification, trained in sepsis aftercare. She acts as an attendant for the patient, asking about the patient’s health constitution and actual problems, and provides training and monitoring. The liaison physician as the GP’s contact person is responsible for the education and reporting of the monitoring results and offers feedback if required. The liaison physician also determines further patient educational elements to the case manager.
After discharge from the ICU, intervention patients receive specific discharge forms from the case manager. All treating physicians (ICU, general wards and rehabilitation clinic) are requested to record sepsis-related clinical and social information about the patients and his or her needs. This supports the GP to manage ambulant treatment and special therapeutic needs of the patient like home care, physiotherapy, specific adjuvants etcetera.
Both, patients and GPs are trained in evidence-based diagnostics and therapy of the most prevalent sepsis sequelae. The liaison physician trains the GP face-to-face using audiovisual education material to impart knowledge about etiology, symptoms, diagnostic instruments and therapy options of sepsis sequelae.
Patients in the intervention group are educated as well in a face-to-face situation by the case manager to get better information about:
the study course,
the monitoring program,
origin and therapy of sepsis,
possible sepsis sequelae,
physical and psychological impacts of intensive therapy and
coping strategies and self-efficacy.
Patients and GPs receive a written manual, including both training content and monitoring instruments. Manuals are used to support training sessions. The patient manual is based on the Discern-criteria . Patients are contacted every month during the first six months after discharge from ICU and every three months during months 7 to 12 for the monitoring. This telephone interview includes established short form instruments for the most common sepsis sequelae, differing from outcome instruments (see Additional file 3). Based on the monitoring results, patients are encouraged to work toward target agreements in daily life. Patient compliance is requested and monitored in the course.
The liaison physician provides this information to the GP with the help of a stratification of urgency (traffic light scheme). The GP is contacted immediately by phone if a new clinical condition arises and gets information about diagnostic and therapeutic possibilities, whereas the liaison physician is available for supervision and requests. In addition, the patient is asked to visit his/her GP if health problems occur.
Patients in the control group are treated as usual by their GPs or ambulant specialists without any additional information or monitoring. There aren’t any outpatient sepsis follow-up clinics in Germany.
Due to the lack of sepsis aftercare guidelines in Germany, there is no treatment standard available. Usual care is assessed in control group patients. Qualitative interviews of GPs and patients provide additional information.
Data are collected from patients in questionnaires by trained study staff, initially face to face, and from T2 onwards, by phone call. In addition, GPs and ICU staff are asked to provide clinical information after patients have given their informed and written consent. Data are documented as written case report forms and stored in a protected cabinet.
Measurements take place from 3 months before hospitalization (T-1, retrospectively) until 1, 6, 12 and 24 months after discharge from the ICU (T1-4).
Primary outcome is the health-related quality of life assessed by the Short Form 36 Health Questionnaire (SF-36), a multidimensional construction of physical, mental, social and behavior-related components of well-being and operational capability, validated also for German primary care .
Secondary outcomes focus on the most relevant sepsis sequelae, including the assessment of physical activity, level of pain, and cognitive deficits or neuropathic symptoms by established questionnaires, all of which are patient-reported outcomes.
Furthermore, for GP compliance review, treatment and cost-effectiveness analysis, patient rehospitalizations, medication, care needs, mortality, physical therapy and instrumental diagnostic procedures are documented by the primary care provider. GPs are asked to provide details of their practice characteristics.
For clinical analysis, diagnoses and ICU procedures are extracted from the ICU documentation system.
For detailed variable/outcome parameter descriptions see Table 1 and Additional file 4.
To gain insight into processes, barriers and mechanisms of the intervention, qualitative interviews with patients and GPs are performed on a subsample. In this context, the roles of patients’ relatives are also to be evaluated.
Randomization process will be proofed using binary logistic regression. The dependent variable logarithmic odds ratio of patient is in the intervention versus control group. As predictors, we use potential confounders (for example, socio-demographic or clinical variables). Primary outcome will be analyzed based on a two-sided t-test. Secondary endpoints will be analyzed depending on scale level, using descriptive or hypothesis generating test procedures. For evaluation of average treatment effects, we will analyze the outcome variables with a generalized analysis of covariance (g-ANCOVA) and control for potential confounders. Based on these results, we are able to adjust means, which are comparable with outcome means of a perfect randomized and balanced design [49, 50].
Furthermore, mortality is taken into account. Using survival analysis models, we are able to examine the relationship between mortality and treatment. In this way, we also try to identify mortality risk factors.
Finally, we plan cost-effectiveness analyses. Therefore, we sum up the costs of micro interventions and compare the averages of treatment and control group using g-ANCOVA (see above).
Description of risks
Showing 6- month mortality of more than 30% , severe sepsis ranks among critical long-term conditions. Serious risks or undesired effects of completing questionnaires have not been reported by clinical expertise of the scientific experts in the advisory board of the study (see Additional file 1). There are no specific risks related to the intervention. Thus, there are no rules for stopping the intervention.
The study is planned and conducted in accordance with medical professional codex and the Helsinki Declaration of 1996 as well as the Federal Data Protection Act (BDSG).
Patients participate in the study voluntarily and give written informed consent. Patients are informed that they can cancel their participation at any time without disclosing reasons for their cancellation and without negative consequences for their future medical care. The study protocol was approved by the institutional review board of the University of Jena, 26 January 2011 (No.3001/111).
The patient names and other confidential information are secured by the medical confidentiality rules and are treated according to Federal Data Protection Act (BDSG).
All study-related data and documents are stored on a protected central server at Jena University Hospital. Only members of the study team have access to the study files.
Intermediate and final reports are stored in the office of the Institute of General Practice and Family Medicine at the Jena University Hospital.
Contacting control patients via phone calls for data collection may create a small intervention (Hawthorne) effect in the control group. Therefore, the intervention effect is likely to be underestimated. This might be acceptable because we would not overuse any effect of the trial.
In addition, contamination by information flow between the intervention and control group cannot be excluded. However, this risk seems to be minimized by the allocation of one GP to one patient of either intervention or control group. Most GPs in Germany practice alone.
To our knowledge, SMOOTH is the first study evaluating the effects of a primary care-based intervention for patients after a critical illness, that is sepsis . Using established primary care structures, SMOOTH may provide a cost-effective addition to sepsis aftercare. Furthermore, considering the long-term impact of sepsis sequelae, 24-month follow-up data will be provided, which are rarely published and allow analysis of intervention sustainability. As a further innovative element, an external medical consultant in primary care (the liaison physician) might help to support quality of care in primary care settings - strengthening the GP as a reliable clinical partner for patients after critical illness.
The first patient was included on 28 February 2011. Patient recruitment is ongoing but not completed.
Center of Sepsis Control and Care
generalized analysis of covariance
graded chronic pain scale
German Sepsis Society
instrumental activities of daily life
international statistical classification of diseases and related health problems
intensive care unit)
short form for medication use
major depression inventory
malnutrition universal screening tool
neuropathic symptom score
modified overall disability sum score
patient assessment of care for chronic conditions
patient health questionnaire
post-traumatic stress disorder
post-traumatic stress syndrome 10-questions inventory
Regensburg insomnia scale
short form 36 health survey
systemic inflammatory response syndrome
Sepsis Survivors Monitoring and Coordination in Outpatient Health care
Thuringian Foundation for Technology, Innovation and Research
modified telephone interview for cognitive status
short musculoskeletal function.
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Members of the SMOOTH-study group
Kerth S, Kuhnsch H and Reinhart K, Jena University Hospital, Geist A and Schreiber T, Zentralklinik Bad Berka, Berhold C, Corea M, Freitag A, Gerlach H, Kuehnemund R, Lehmke J, Lehmkuhl P, Reil L, Tiedemann G, Toissaint S and Veit S, Vivantes Clinics Berlin, Goldmann A, Heintze Ch, Oppert M, Keh D, Rademacher S, Spiess C and Toepfer L, Charite University Medicine Berlin, Klefisch F, Paulinen Hospital Berlin, Rohr U and Kern H, DRK Clinics Berlin, Sablotzki A, St. Georgs Hospital Leipzig, Oehmichen F and Pohl M, Bavaria Clinic Kreischa, Meier-Hellmann A, Helios Clinic Erfurt, and Hamzei F, Moritzclinic Bad Klosterlausnitz, who participated in data collection, Bak P, Hartmann M, Hartog C, Reinhart K, Strauss B, Jena University Hospital, Ehlert U, Institute of Psychology, University of Zurich, Gauder H, German Sepsis Aid, Graf J, Clinic Stuttgart, Koenig HH, University Hospital Hamburg-Eppendorf, von Korff M, Group Health Research Institute Seattle WA, Ollenschläger G, AQuMED Berlin, and Schelling G, University Clinic LMU Munich provide consulting advice.
The study was supported by the Center of Sepsis Control & Care (CSCC), funded by the German Federal Ministry of Education and Research (BMBF; grant no. 01 E0 1002); by the Paul Martini Sepsis Research Group, funded by the Thuringian Ministry of Education, Science and Culture (ProExcellence; grant no. PE 108- 2); the publically funded Thuringian Foundation for Technology, Innovation and Research (STIFT); and the German Sepsis Society (GSS).
The authors declare that they have no competing interests.
FM, JG, KS, JM and PT participated in the study design, study conduct/data collection and in writing the final manuscript; KBF, KSc, NS and SW participated in the study design and study conduct/data collection. AF, ChE, DD, FMB and MW participated in study design and the critical revision of the manuscript. ABK, StK and UJ participated in the study conduct and data collection. All authors approved the final version of the manuscript.
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Schmidt, K., Thiel, P., Mueller, F. et al. Sepsis survivors monitoring and coordination in outpatient health care (SMOOTH): study protocol for a randomized controlled trial. Trials 15, 283 (2014). https://doi.org/10.1186/1745-6215-15-283
- Severe sepsis
- Critical illness
- Primary health care