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Dive into the research topics where Kjell I. Pettersen is active.

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Featured researches published by Kjell I. Pettersen.


Scandinavian Journal of Public Health | 2007

Patient experiences in relation to respondent and health service delivery characteristics: A survey of 26,938 patients attending 62 hospitals throughout Norway

Kirsten Danielsen; Andrew M. Garratt; Øyvind Andresen Bjertnæs; Kjell I. Pettersen

Aims: To assess the association between patient experiences, aspects of healthcare delivery, and patient characteristics for adult somatic inpatients attending hospitals throughout Norway. Methods: The Patient Experiences Questionnaire (PEQ) was mailed to 26,938 patients attending inpatient clinics at 62 Norwegian hospitals during 2002 and 2003 within a six-week period. Reminders were mailed at four weeks. Scores for the PEQ were regressed on whether the patient felt that he/she had received incorrect treatment, had spent the night in a corridor bed, had been an emergency or routine admission, his/her number of previous admissions, hospital teaching status, hospital size and location, health status, and sociodemographic variables. Results: A total of 13,700 (50.9%) patients responded. Patients who felt that they had received incorrect treatment had significantly poorer scores for all 10 PEQ dimensions. Those spending the night in a corridor bed had significantly poorer scores for six dimensions. Emergency admissions and the previous number of inpatient stays were significantly associated with poorer experiences for 10 and 7 dimensions respectively. Hospital size and university status had negative relationships with scores for six and four dimensions respectively. Conclusions: Whether the patient felt that he/she had received the incorrect treatment had by far the strongest association with patient experiences. Future studies of patient experiences and satisfaction should include this variable. As found in previous research, patient experiences were significantly associated with age and health status.


International Journal of Cardiology | 2008

Understanding sex differences in health-related quality of life following myocardial infarction

Kjell I. Pettersen; Aasmund Reikvam; Arnfinn Rollag; Knut Stavem

BACKGROUND The role of sex differences in health-related quality of life (HRQoL) after myocardial infarction (MI) remains controversial. METHODS In total 408 Norwegian patients completed the Short Form 36 (SF-36) questionnaire 2.5 years after MI. We compared HRQoL between sexes and with national norms. Multiple linear regression analysis was used to explore the association of scores on the Physical (PCS) and Mental (MCS) component summary scales with clinical and sociodemographic variables. RESULTS Women scored lower than norms on the Physical functioning, Role functioning-physical, General health, and Role functioning-emotional scales. Men scored higher on Bodily pain, and lower on the other 7 scales compared to norms. Women <70 years scored lower than men on 3 out of 8 scales and on PCS. Women >/=70 scored lower than men on 5 out of 8 scales and on PCS. Relative to sex- and age-specific norms, there were no sex-differences in SF-36 scores. Age, time since the index MI, chronic obstructive pulmonary disease (COPD), previous MI, and stroke predicted PCS scores in women. Education, COPD, infarct localization, number of indications for cardiovascular medication at discharge, medication for heart failure, and subsequent MI predicted PCS scores in men. Smoking status, education, and Q-wave MI were determinants for MCS scores in men. CONCLUSION Patients had impaired HRQoL compared to sex- and age-specific norms 2.5 years after MI. Women had lower HRQoL scores than men, but relative to norms HRQoL was equally affected in both sexes. Men and women had different determinants of HRQoL.


European Journal of Heart Failure | 2005

Reliability and validity of the Kansas City Cardiomyopathy Questionnaire in patients with previous myocardial infarction

Kjell I. Pettersen; Aasmund Reikvam; Arnfinn Rollag; Knut Stavem

The Kansas City Cardiomyopathy Questionnaire (KCCQ) is a recently developed disease‐specific instrument for measuring health‐related quality of life (HRQoL) in patients with chronic heart failure (CHF) regardless of aetiology.


Health and Quality of Life Outcomes | 2004

Association of changes in health-related quality of life in coronary heart disease with coronary procedures and sociodemographic characteristics

Kjell I. Pettersen; Arnfinn Rollag; Knut Stavem

BackgroundFew studies have focused on the association between the sociodemographic characteristics of a patient with the change in health-related quality of life (HRQOL) following invasive coronary procedures, and the results remain inconclusive. The objective of the present study was to measure the temporal changes in HRQOL of patients with coronary heart disease, and assess how these changes are associated with invasive coronary procedures and sociodemographic characteristics.MethodsThis was a prospective study of 254 patients with angina pectoris and 90 patients with acute coronary syndrome. HRQOL was assessed with the multi-item scales and summary components of the SF-36, both 6 weeks and 2 years after baseline hospitalization in 1998. Paired t-tests and multiple regression analyses were used to assess temporal changes in HRQOL and to identify the associated factors.ResultsPhysical components of HRQOL had improved most during the 2 years following invasive coronary procedures. Our findings indicated that patients with angina pectoris who were younger, male, and more educated were most likely to increase their HRQOL following invasive coronary procedures. When adjusting for baseline HRQOL scores, invasive coronary procedures and sociodemographic characteristics did not explain temporal changes in patients with acute coronary syndrome, possibly due to higher comorbidity.ConclusionSociodemographic characteristics should be taken into account when comparing and interpreting changes in HRQOL scores in patients with and without invasive coronary procedures.


BMC Cardiovascular Disorders | 2008

Health-related quality of life after myocardial infarction is associated with level of left ventricular ejection fraction

Kjell I. Pettersen; Elena Kvan; Arnfinn Rollag; Knut Stavem; Aasmund Reikvam

BackgroundThe objective was to explore the relationship between left ventricular ejection fraction (LVEF) assessed during hospitalization for acute myocardial infarction (MI) and later health-related quality of life (HRQoL).MethodsWe used multivariable linear regression to assess the relationship between LVEF and HRQoL in 256 MI patients who responded to the Kansas City Cardiomyopathy Questionnaire (KCCQ), the EQ-5D Index, and the EuroQol Visual Analogue Scale (EQ-VAS) 2.5 years after the index MI.Results167 patients had normal LVEF (>50%), 56 intermediate (40%–50%), and 33 reduced (<40%). The mean (SD) KCCQ clinical summary scores were 85 (18), 75 (22), and 68 (21) (p <0.001) in the three groups, respectively. The corresponding EQ-5D Index scores were 0.83 (0.18), 0.72 (0.27), and 0.76 (0.14) (p = 0.005) and EQ-VAS scores were 72 (18), 65 (21), and 57 (20) (p = 0.001). In multivariable linear regression analysis age ≥ 70 years, known chronic obstructive pulmonary disease (COPD), subsequent MI, intermediate LVEF, and reduced LVEF were independent determinants for reduced KCCQ clinical summary score. Female sex, medication for angina pectoris at discharge, and intermediate LVEF were independent determinants for reduced EQ-5D Index score. Age ≥ 70 years, COPD, and reduced LVEF were associated with reduced EQ-VAS score.ConclusionLVEF measured during hospitalization for MI was a determinant for HRQoL 2.5 years later.


Quality of Life Research | 2005

Reliability and validity of the Norwegian translation of the Seattle Angina Questionnaire following myocardial infarction

Kjell I. Pettersen; Aasmund Reikvam; Knut Stavem

AbstractThe aim of this study was to validate the Norwegian version of the Seattle Angina Questionnaire (SAQ), a self-administered 19-item questionnaire designed to assess health-related quality of life in patients with chest pain or coronary artery disease. In 885 patients with prior myocardial infarction (MI), we abstracted clinical data from the patients’ medical records. Two to three years after the MI, we mailed a self-administered questionnaire including the SAQ, the Short Form 36 (SF-36), and questions about current medication, to the 548 patients still alive. The response rate was 74%. Internal consistency reliability of the SAQ, assessed with Cronbach’s α, ranged 0.75–0.92. Test–retest reliability, tested with an intraclass correlation coefficient, ranged 0.29–0.84. The pattern of association between similar and dissimilar scales of the SAQ and SF-36 mainly supported the construct validity of the SAQ. Four of the five SAQ scales discriminated between patients with different medication regimens as a proxy for severity of angina pectoris. We conclude that the Norwegian version of the SAQ showed acceptable reliability and cross-sectional validity following MI, with properties in line with the original US version.


Open Heart | 2017

Morbidity outcomes after surgical aortic valve replacement

Andreas Auensen; Amjad Iqbal Hussain; Bjørn Bendz; Lars Aaberge; Ragnhild Sørum Falk; Marte Meyer Walle-Hansen; Jorun Bye; Johanna Andreassen; Jan Otto Beitnes; Kjell Arne Rein; Kjell I. Pettersen; Lars Gullestad

Objective In patients with mild to moderate operative risk, surgical aortic valve replacement (SAVR) is still the preferred treatment for patients with severe symptomatic aortic stenosis (AS). Aiming to broaden the knowledge of postsurgical outcomes, this study reports a broad set of morbidity outcomes following surgical intervention. Methods Our cohort comprised 442 patients referred for severe AS; 351 had undergone SAVR, with the remainder (91) not operated on. All patients were evaluated using the 6-minute walk test (6MWT), were assigned a New York Heart Association class (NYHA) and Canadian Cardiovascular Society class (CCS), with additional scores for health-related quality of life (HRQoL), cognitive function (Mini-Mental State Examination (MMSE)) and myocardial remodelling (at inclusion and at 1-year follow-up). Adverse events and mortality were recorded. Results Three-year survival after SAVR was 90.0%. SAVR was associated with an improved NYHA class, CCS score and HRQoL, and provoked reverse ventricular remodelling. The 6MWT decreased, while the risks of major adverse cardiovascular events (death, non-fatal stroke/transient ischaemic attack or myocardial infarction) and all-cause hospitalisation (incidence rate per 100 patient-years) were 13.5 and 62.4, respectively. The proportion of cognitive disability measured by MMSE increased after SAVR from 3.2% to 8.8% (p=0.005). Proportion of patients living independently at home, having attained NYHA class I, was met by 49.1% at 1 year. Unoperated individuals had a poor prognosis in terms of any outcome. Conclusion This study provides knowledge of outcomes beyond what is known about the mortality benefit after SAVR to provide insight into the morbidity burden of modern-day SAVR.


Journal of the American Heart Association | 2016

Eliciting Patient Risk Willingness in Clinical Consultations as a Means of Improving Decision‐Making of Aortic Valve Replacement

Amjad Iqbal Hussain; Andrew M. Garratt; Cathrine Brunborg; Svend Aakhus; Lars Gullestad; Kjell I. Pettersen

Background Treatment decisions for aortic valve replacement (AVR) should be sensitive to patient preferences. However, we lack knowledge of patient preferences and how to obtain them. Methods and Results We assessed the mortality risk patients were willing to accept when undergoing AVR by using the Standard Gamble method and aimed to show how this risk willingness was affected by level of disease burden. We report findings from 439 patients, aged >18 years with severe aortic stenosis who were referred for evaluation of AVR to our institution. The vast majority of patients accepted a mortality risk regarded as high or prohibitive according to current guidelines. Of the 439 patients, 51% patients were willing to forego surgery with high mortality risk (8–50%) and 19% were willing accept a prohibitive mortality risk (>50%) as defined in current guidelines. However, the risk willingness varied considerably. Acceptance of prohibitive risk willingness (>50%) was associated with reporting of 3 to 5 different restricting symptoms, with an odds ratio of 4.07 (95% CI 1.56–10.59) opposed by increasing score on EuroQol–Visual Analog Scale, with an odds ratio of 0.99 (95% CI 0.97–1.00). The poor ability to predict risk willingness based on available clinical variables and health status suggests that other factors may be important advocating the need for tools for soliciting patients preferences individually. Conclusion When undergoing AVR, patients were willing to accept considerably higher perioperative risk than what is considered acceptable in current guidelines and practice. Patient preferences varied considerably, and they should be directly assessed and taken into account in decision‐making and guidelines. Clinical Trial Registration URL: https://clinicaltrials.gov/. Unique identifier: NCT01794832.


Interactive Cardiovascular and Thoracic Surgery | 2018

Age-dependent morbidity and mortality outcomes after surgical aortic valve replacement

Amjad Iqbal Hussain; Andreas Auensen; Cathrine Brunborg; Jan Otto Beitnes; Lars Gullestad; Kjell I. Pettersen

OBJECTIVES This study addressed the assumption of increased morbidity and mortality after surgical aortic valve replacement in patients older than 80 years with severe aortic stenosis. METHODS This prospective study was performed in consecutive patients referred for aortic valve replacement. The age-dependent change in cognitive and physical function, quality of life and rehospitalization and complication rates during the following year and 5-year all-cause mortality were documented. RESULTS A total of 351 patients underwent surgical aortic valve replacement. The death risk at 5 years was 10%, 20% and 34% in patients aged <70 years, 70-79 years and ≥80 years, respectively. Patients aged 70-79 years and ≥80 years had a hazard ratio of 1.88 [95% confidence interval (95% CI) 0.92-3.83, P = 0.08] and 2.90 [95% CI 1.42-5.92, P = 0.003] for mortality, respectively, when compared with patients aged <70 years. The length of stay and rehospitalization rate during the following year were similar between the groups. Patients ≥80 years of age experienced more delirium and infections, whereas the risks of new pacemaker, transient ischaemic attack (TIA) or stroke, myocardial infarction and heart failure were comparable between the age groups. All groups exhibited reduced New York Heart Association class, improved physical quality of life and unchanged mental scores without any clinically significant Mini Mental Status reduction. CONCLUSIONS Elderly patients (≥80 years of age) have important gains in health measures and satisfactory 5-year survival with an acceptable complications rate during the year following surgery. Active respiratory mobilization and the removal of an indwelling urethra catheter can prevent adverse effects, and measures should be taken to prevent delirium and confusion in elderly patients. Clinical trial registration clinicaltrials.gov (NCT 01794832).


European Journal of Cardio-Thoracic Surgery | 2018

Patient-reported outcomes after referral for possible valve replacement in patients with severe aortic stenosis

Andreas Auensen; Amjad Iqbal Hussain; Andrew M. Garratt; Lars Gullestad; Kjell I. Pettersen

OBJECTIVES Health-related quality of life (HRQoL) is an important outcome after surgical aortic valve replacement (SAVR). To improve interpretation of HRQoL, mean score change and change in terms of minimal important difference (MID) were assessed using validated instruments for measuring patient-reported outcomes in patients with severe aortic stenosis referred for possible SAVR. METHODS Of the 442 included patients with severe aortic stenosis evaluated for possible SAVR, 351 were referred to SAVR (operated) and 91 to medical treatment (unoperated). At presurgical evaluation and 1 year postoperatively, HRQoL was assessed using SF-36v2 and EQ-5D. Results were compared with outcomes reported in unoperated patients. We explored the association of clinical factors and improvements corresponding to MID. RESULTS Among the operated patients, statistically significant change was found for EQ-5D scores and SF-36 scale scores for physical functioning, role-physical, bodily pain, general health, vitality and physical summary score. The largest proportion of operated patients achieving change corresponding to at least MID was 61.5% for physical summary score. Change in unoperated patients also related largely to physical scales of the SF-36. However, smaller proportions of unoperated patients reported improvements, and larger proportions reported decline reaching MID. Baseline scores, but no clinical covariates, were consistently associated with improved HRQoL reaching MID across instruments for those referred to SAVR. CONCLUSIONS This study found improvement in HRQoL 1 year after SAVR for patients with severe aortic stenosis. Results in unoperated patients suggest that HRQoL deteriorates 1 year after evaluation of possible SAVR. CLINICAL TRIAL REGISTRATION www.clinicaltrials.gov (NCT01794832).

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Lars Gullestad

Oslo University Hospital

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Knut Stavem

Akershus University Hospital

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Arnfinn Rollag

Akershus University Hospital

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