scholarly journals AB0727 WORK OUTCOMES AND ASSOCIATED FACTORS IN ANKYLOSING SPONDYLITIS PATIENTS IN CHINA

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1658.1-1658
Author(s):  
L. Tu ◽  
Y. Xie ◽  
Q. Lv ◽  
M. Yang ◽  
Z. Liao ◽  
...  

Background:Poorer work productivity due to pain and functional impairment is commonly seen in ankylosing spondylitis (AS) patients, which may contribute to huge social economic burden. However, data about work outcomes and associated factors in Chinese AS patients were barely reported.Objectives:To assess work outcomes and identify factors associated with poor work productivity in patients with AS in China.Methods:A cross-sectional study was conducted in China. Adult patients (aged ≥ 18 years) fulfilled the 1984 New York modified criteria of AS were enrolled from rheumatology center from Jan 2017 to Aug 2017. All participants completed questionnaires about socio-demographic characteristics, disease characteristics, quality of life and the Work productivity and activity impairment questionnaire in AS (WPAI:SpA) to accesses the impact of chronic health conditions on job performance and productivity. Factors associated with work outcomes were evaluated.Results:A total of 91 patients with AS were included: 87.8% males, 78.02% employed, mean age and disease duration of 30 and 10 years respectively. The mean (SD) activity impairment of all patients was 48.57% (22.02%). For patients with employed work, mean (SD) absenteeism, presenteeism and work productivity loss were 10.22% (19.44%), 43.86% (22.48%) and 47.92% (25.81%) respectively. In multivariable analysis, activity impairment was associated with Bath Ankylosing Spondylitis Functional Index (BASFI) (P<0.01) and Ankylosing Spondylitis Quality of Life (ASQoL) (P<0.01). Absenteeism was associated with disease duration (P=0.03). Presenteeism was associated with disease duration (P=0.04), BASFI (P<0.01) and ASQoL (P<0.01). Work productivity loss was associated with BASFI (P<0.01) and ASQoL (P<0.01).Conclusion:Longer disease duration, reduced physical function and poorer quality of life are associated with reduced work productivity in Chinese AS patients.References:[1]Boonen A, van der Heijde D, Landewe R, Spoorenberg A, Schouten H, Rutten-van Molken M, et al. Work status and productivity costs due to ankylosing spondylitis: comparison of three European countries. Annals of the rheumatic diseases. 2002;61(5):429-37.[2]Martindale J, Shukla R, Goodacre J. The impact of ankylosing spondylitis/axial spondyloarthritis on work productivity. Best Pract Res Clin Rheumatol. 2015;29(3):512-23.[3]Castillo-Ortiz JD, Ramiro S, Landewe R, van der Heijde D, Dougados M, van den Bosch F, et al. Work Outcome in Patients With Ankylosing Spondylitis: Results From a 12-Year Followup of an International Study. Arthritis Care Res (Hoboken). 2016;68(4):544-52.[4]Sag S, Nas K, Sag MS, Tekeoglu I, Kamanli A. Relationship of work disability between the disease activity, depression and quality of life in patients with ankylosing spondylitis. J Back Musculoskelet Rehabil. 2018;31(3):499-505.[5]Goh Y, Kwan YH, Leung YY, Fong W, Cheung PP. A cross-sectional study on factors associated with poor work outcomes in patients with axial spondyloarthritis in Singapore. Int J Rheum Dis. 2019;22(11):2001-8.Disclosure of Interests:None declared

2020 ◽  
Vol 8 ◽  
Author(s):  
Liudan Tu ◽  
Ya Xie ◽  
Zetao Liao ◽  
Yutong Jiang ◽  
Qing Lv ◽  
...  

Objectives: To access the cost of illness, quality of life and work limitation in active ankylosing spondylitis (AS) patients using adalimumab in China.Methods: A prospective study was performed in 91 patients with active AS in China. Adult patients (aged ≥ 18 years) fulfilled the 1984 New York modified criteria of AS with the Bath Ankylosing Spondylitis Disease Activity Index ≥ 4 were enrolled. All participants received adalimumab (40 mg per 2 weeks) therapy and completed questionnaires about disease characteristics, quality of life and cost. Only patients with pay-work completed the Work Limitation Questionnaire and Work productivity and activity impairment questionnaire in AS. Factors associated with work outcomes were evaluated.Results: A total of 91 patients with mean age of 30 years old (87.8% males) and mean disease duration of 10 years received adalimumab treatment for 24 weeks. The annual estimated cost of each patient was $37581.41 while the direct cost accounted for 84.6%. Seventy-eight percent of patients have a paid job with average work productivity loss of 0.28 measured by work limitation questionnaire, absenteeism and presenteeism were 10.22 and 43.86%, respectively, with a mean work productivity loss of 47.92% measured by Work productivity and activity impairment questionnaire in AS. Patients experienced significantly greater improvements after adalimumab treatment in presenteeism, absenteeism, work productivity, and quality of life.Conclusions: The cost of AS patients with adalimumab therapy was high in China. Disease activity, physical function, quality of life, and work outcomes improved significantly after therapy.


2009 ◽  
Vol 37 (2) ◽  
pp. 385-392 ◽  
Author(s):  
WALTER P. MAKSYMOWYCH ◽  
KATHERINE L. GOOCH ◽  
ROBERT L. WONG ◽  
HARTMUT KUPPER ◽  
DÉSIRÉE VAN DER HEIJDE

Objective. To determine factors associated with work in patients with ankylosing spondylitis (AS).Methods. Three hundred fifteen patients with AS were enrolled in a 24-week, randomized controlled study of adalimumab with a longterm, open-label, adalimumab extension phase. Patient-reported outcome (PRO) measures included the Medical Outcome Study Short Form 36 Health Survey (SF-36), AS Quality of Life Questionnaire (ASQOL), Health Utilities Index Mark 3 (HUI-3), and Work Productivity and Activity Impairment-Specific Health Problem Questionnaire (WPAI-SHP). Multivariate logistic regression was used to analyze differences between working and nonworking patients. The relationships between PRO and WPAI-SHP scores were assessed using Pearson correlation coefficients. Multivariate modeling was applied to determine factors associated with productivity while at work. WPAI-SHP was assessed through 3 years of adalimumab exposure.Results. Younger age (p = 0.002) and male sex (p < 0.001) were significantly and independently associated with working patients with AS. The SF-36 Physical Component Summary score (p < 0.001), ASQOL score (p < 0.001), HUI-3 scores (p < 0.001), and both patient’s global assessment of disease activity (p < 0.001) and nocturnal pain (p < 0.001) scores were independently associated with working status. Work absenteeism due to AS was weakly correlated with all PRO scores. WPAI-SHP components of work presenteeism (lack of productivity at work), activity impairment, and overall work productivity loss due to AS were moderately correlated with quality of life as measured by the ASQOL, the SF-36 Physical Component Summary score, and the SF-36 Bodily Pain domain. Linear multivariate analyses indicated that work presenteeism was significantly associated with pain, functioning, and disease activity. Longterm adalimumab treatment was associated with sustained improvements in WPAI-SHP scores.Conclusions. Quality of life and the physical consequences associated with AS have a direct relationship with a patient’s ability to work. Adalimumab sustains improvements in work outcomes in patients with AS.


2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
H. Kalboussi ◽  
I. Kacem ◽  
H. Aroui ◽  
O. El Maalel ◽  
M. Maoua ◽  
...  

Background. Allergic contact dermatitis (ACD) is a common chronic skin disease that generates considerable public-health and socioeconomic costs. This disease affects the quality of life and the occupational activity of patients. Aims. To assess the quality of life (QOL) of patients with ACD and study the impact of this disease on their work productivity. Methods. This is a cross-sectional study carried out from January 2012 to December 2014. All patients diagnosed with ACD in the Dermato-Allergology Unit of the Occupational Medicine Department at Farhat Hached University Hospital, in Sousse, were included. The impact of skin disease on the QOL of affected persons was assessed using the Dermatology Life Quality Index (DLQI). The work productivity was measured using the Work Productivity and Activity Impairment Allergic Specific questionnaire (WPAI: AS). Results. The study population consisted of 150 patients. The average score of DLQI was 6.5. Over the previous 7 days, absenteeism rate was 25.9 ± 15.3%, presenteeism rate was 50.2 ± 32%, overall work productivity loss was 29.6 ± 19.4%, and daily activity impairment was 50.4 ± 32.3%. The DLQI score was significantly associated with atopy (p = 0.03), relapses strictly greater than 10 (p = 0.02), presenteeism (p <10−3), overall work productivity loss (p = 0.01), and daily activity impairment (p = 0.03). Conclusion. The impact of ACD on QOL and occupational activity seems important and requires specific attention from the occupational physician.


2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1272.1-1272
Author(s):  
M. Ben Majdouba ◽  
S. Boussaid ◽  
S. Rekik ◽  
S. Jemmali ◽  
H. Ajlani ◽  
...  

Background:Work productivity of patients with spondyloarthritis is frequently affected by their disease.Objectives:We aim to identify disease-related factors associated with poor work productivity in patients with spondyloarthritis.Methods:A cross-sectional study was performed in patients with spondyloarthritis. Data on disease characteristics were collected as well as specific indices: Visual analogue scale (VAS) for fatigue and pain, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Ankylosing Spondylitis Disease Activity Score with CRP (ASDAS-CRP), Bath Ankylosing Spondylitis Functionnel Index (BASFI) and Bath Ankylosing Spondylitis Metrology Index (BASMI). EuroQol-5D (EQ5D) was used to assess health-related quality of life. Work productivity was assessed by the Work Productivity and Activity Impairment scale (WPAI:SpA). Factors associated with presenteeism, absenteeism and work productivity loss were evaluated.Results:One hundred patients were enrolled (73 men and 27 women); mean age was 43.68 ± 10.3 years. Fifty nine percent of patients were employed, 26% were off work and 15% were retired of which 8% were in early retirement. Sixty seven percent of patients had ankylosing spondylitis, 17% had rheumatism associated with inflammatory bowel disease and 16% had psoriatic rheumatism. The average disease duration was 12.24 ± 8.73 years. Mean age at onset was 33.2 ± 10 years [18-59]. The average diagnostic delay was 2.41 ± 3 years; it was more than five years in 17% of cases. Sacroiliac pain has been noted in 69 patients, lumbar or cervical stiffness in 78 patients and peripheral joint involvement in 18 cases. Thirty one percent of patients had hip joint involvement and 49% had extra-articular manifestation. Fifty percent had inflammatory biological syndrome, 63% were treated with anti-TNFα and 58% needed symptomatic treatment regularly. The mean fatigue and pain VAS was respectively 5.58 ± 2.5 and 5.56 ± 2.9. The mean BASDAI was 4.4 ± 2.4, the average BASFI was 4.6 ± 2.7 and the average ASDAS-CRP was 2.77 ± 1.18. The mean BASMI was 4.4 ± 2.8. The mean EQ5D score was 0.485 ± 0.378. Among employed patients, mean absenteeism, presenteeism and work productivity loss was 21.8 ± 33.13%, 42 ± 32% and 46.5 ± 35.31%, respectively. These work outcomes were correlated to diagnostic delay ≥ 2 years (p<0.03), peripheral joint involvement (p=0.006), psoriasis (p=0.02), inflammatory biological syndrome (p<0.001), need of symptomatic treatment (p=0.001), fatigue and pain VAS ≥ 4 (p<0.001), BASDAI ≥ 4 (p<0.001), ASDAS-CRP ≥ 2.1 (p<0.001), BASFI ≥ 4 (p<0.001), BASMI ≥ 4 (p=0.002) and low EQ5D score (p<0.001). Work productivity loss was in addition correlated to age at onset < 25 years (p=0.03).Conclusion:Active disease, reduced physical function and poorer quality of life are associated with reduced work productivity. Early diagnosis and good disease management especially fatigue and pain can potentially improve work outcomes in patients with spondyloarthritis.Disclosure of Interests:None declared.


2015 ◽  
Vol 19 (6) ◽  
pp. 546-554 ◽  
Author(s):  
K. Heelan ◽  
S. L. Hitzig ◽  
S. Knowles ◽  
A. M. Drucker ◽  
N. Mittmann ◽  
...  

Background: Little is known about quality of life and work productivity in autoimmune bullous dermatoses (AIBDs). Objective: To determine the impact of AIBDs on quality of life and work productivity. Methods: An observational cross-sectional study took place between February and May 2013 at an AIBD tertiary referral centre. Ninety-four patients were included. All participants completed the Dermatology Life Quality Index and the Work Productivity and Activity Impairment–Specific Health Problem questionnaires. Results: Responders to treatment had less impairment ( P < .001) than nonresponders. Patients with severe AIBD had significantly more impairment that those with mild ( P < .001) and moderate ( P = .002) AIBD. Greater impairment was associated with higher percentage of work missed. Those with a higher Dermatology Life Quality Index score had greater work impairment and overall activity impairment ( P = .041, P = .024). Nonresponders had increased impairment while working ( P < .001), overall work impairment ( P < .001), and activity impairment ( P < .001). Severely affected patients had worse impairment in all Work Productivity and Activity Impairment Questionnaire domains. Conclusions: AIBD has the potential to be a large burden on ability to work and quality of life. Larger studies are needed to clarify how these domains change over time and whether or not they improve with treatment.


2015 ◽  
Vol 11 (4) ◽  
pp. 325 ◽  
Author(s):  
Shaloo Gupta, MS ◽  
Haridarshan Patel, PharmD ◽  
Justin Scopel, MD, MBA ◽  
Reema R. Mody, MBA, PhD

Objective: The authors sought to characterize health-related quality of life (HRQoL), medication adherence, productivity losses, and treatment satisfaction associated with modifications to opioid therapy due to opioid-induced constipation (OIC).Design: A cross-sectional, between-subjects design was used to examine health outcomes among US noncancer participants currently taking opioids.Patients, participants: Participants were adults in the 2012 US National Health and Wellness Survey, who reported currently using opioids (>30 days) and experiencing constipation. Respondents were categorized as making modifications to opioid therapy due to OIC (modifiers, n = 244) or making no modifications (nonmodifiers, n = 247).Main outcome measures: Patient Assessment of Constipation Quality of Life (PAC-QoL) and Symptoms (PAC-Sym), Morisky Medication Adherence Scale (MMAS-4), Work Productivity and Activity Impairment, and the Treatment Satisfaction Questionnaire for Medication (TSQM II) for OIC treatment were administered. Generalized linear models were adjusted to control for baseline characteristics (age, gender, comorbidities, opioid strength, etc). Results: Modifiers reported poorer HRQoL (PAC-QoL total: 1.74 vs 1.44, p < 0.001), worse constipation (PAC-Sym total: 1.56 vs 1.35, p = 0.003), more pain-related resource use (surgery: odds ratio (OR) = 3.72, p = 0.002; emergency room visits: OR = 1.88, p = 0.049; hospitalizations: OR = 2.47, p = 0.033), and lower adherence (MMAS-4 pain: OR = 0.12, p < 0.001; MMAS-4 OIC: OR = 0.39, p < 0.001) than nonmodifiers. Modifiers reported greater presenteeism (49.75 percent vs 38.28 percent, p = 0.038), but no significant differences were found for activity impairment or OIC treatment satisfaction.Conclusions: Treating OIC effectively may help prevent inadequate pain management secondary to opioid therapy modification, help increase HRQoL, lessen OIC symptoms, decrease productivity loss, and improve adherence to opioid and OIC treatments.


2019 ◽  
Author(s):  
Heleen van Haalen ◽  
James Jackson ◽  
Bruce Spinowitz ◽  
Gary Milligan ◽  
Rebecca Moon

Abstract Background. Reductions in health-related quality of life (HRQoL) in patients with chronic kidney disease (CKD) are thought to be exacerbated by the low hemoglobin (Hb) levels that define anemia, a common complication of CKD. The current analysis evaluated the impact of anemia on HRQoL and work productivity in patients with non-dialysis dependent and dialysis dependent CKD using real‑world data.Methods. Data were collected in France, Germany, Italy, Spain, the UK, the USA and China in 2012–2018 in the Adelphi Real World Disease Specific Programme™ (DSP) for CKD, a large, cross-sectional, survey of physicians and their patients. Patients completed three patient-reported outcomes (PRO) instruments: the EuroQol 5-Dimension 3-level (EQ-5D-3L), the Kidney Disease Quality of Life (KDQOL-36) instrument and the Work Productivity and Activity Impairment (WPAI) questionnaire. PROs were assessed by CKD stage and Hb levels, and regression analyses were performed with CKD stage and Hb level as independent variables and PROs as outcome variables, while adjusting for age, sex, CKD stage, comorbidities and CV risk.Results. Overall, 5276 patients participated in the survey, including 28% stage 4 and 36% dialysis patients. Patients with lower Hb levels more often reported problems/issues on all EQ-5D-3L domains (p<0.0001). Regression analyses showed significant associations between lower Hb levels and the probability of low (<0.8) EQ-5D-3L utility scores (p<0.0001) and low visual analog scale (VAS) scores (p<0.05), indicating poorer health status. Associations were seen even when adjusting for CKD stage and other potential confounding factors. Significant associations were observed between Hb level and the 12-Item Short-Form Health Survey (SF‑12) Physical Component Summary (PCS), SF-12 Mental Component Summary (MCS) and the three KDQOL-36 subscales (all p<0.0001), and were confirmed using linear regression analyses adjusting for CKD stage and other potential confounders. Numerically greater work productivity losses and greater activity impairment were observed with lower Hb levels.Conclusions. Lower Hb levels worsen the impact of CKD on HRQoL, and are associated with lower work productivity in patients with CKD. Assessment and treatment of anemia should be recognized as a key component of integral CKD management throughout all stages of the disease.


2019 ◽  
Vol 13 (4) ◽  
pp. 36-40
Author(s):  
A. I. Akulova ◽  
K. D. Dorogoikina ◽  
I. Z. Gaydukova ◽  
A. P. Rebrov

Spondyloarthritides (SpAs) is a group of chronic inflammatory diseases of the spine, joints, and entheses characterized by common clinical, radiological, and genetic features. According to international guidelines, one of the main goals of SpA treatment is to ensure the longest possible preservation of the patient's quality of life (QOL). The use of biological agents (BAs) allows rapid clinical improvement and positively affects QOL in patients.Objective: to evaluate the efficacy of BAs on QOL in patients with SpA in real clinical practice.Patients and methods. A total of 280 patients with SpA were examined. The inclusion criteria were ≥18 years of age; compliance of the clinical picture of the disease with the ASAS criteria for axial SpA (2009) or peripheral SpA (2011); and signing the informed consent form. Disease activity was assessed using the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) and the Ankylosing Spondylitis Disease Activity Score (ASDAS); the functional status of the patients was estimated by the Bath Ankylosing Spondylitis Functional Index (BASFI), and their spinal mobility was evaluated by the Bath Ankylosing Spondylitis Metrology Index (BASMI); ASAS HI was used to comprehensively evaluate the impact of SpA on the patient's health. The European QL EQ-5D-5L and the SF-36 questionnaire were applied to determine quality of life in the patients.Results and discussion. The patients' mean age was 40.19±11.9 years; there was a male preponderance (64%); the HLA-B7-pisitive patients were 78%. The median scores were 5.40 [3.12; 6.80] for BASDAI, 3.37 [2.58; 4.15] for ASDAS, 5.30 [2.60; 7.50] for BASFI, 4.00 [2.60; 6.15] for BASMI, and 9.00 [7.00; 12.00] for ASAS HI. Forty-four patients received a variety of BAs. Patients receiving and not receiving BAs were matched for age and gender; however, the patients on biological therapy (BT) had longer disease duration and lower disease activity according to the ASDAS. There were no statistically significantly difference between the two groups in disease activity according to the BASDAI and in functional disorders according to the BASFI; but there was a tendency towards lower values in the patients on BT. Comparison of QOL in the patients of the two groups revealed statistically significant differences in SF-36 pain scale scores (p=0.02) and EQ-5D-5L indicators (p<0.01).Conclusion. BT makes it possible to successfully achieve one of the main goals of treating patients with SpA, namely to preserve QOL. The patients receiving BAs had longer disease duration, while they were comparable to those not receiving this treatment in terms of the degree of functional disorders.


Author(s):  
Heleen van Haalen ◽  
James Jackson ◽  
Bruce Spinowitz ◽  
Gary Milligan ◽  
Rebecca Moon

Abstract Background Reductions in health-related quality of life (HRQoL) in patients with chronic kidney disease (CKD) are thought to be exacerbated by the low hemoglobin (Hb) levels that define anemia, a common complication of CKD. The current analysis evaluated the impact of anemia on HRQoL and work productivity in patients with non-dialysis dependent and dialysis-dependent CKD using real-world data. Methods Data were collected in France, Germany, Italy, Spain, the UK, the USA and China in 2012–2018 in the Adelphi Real World Disease Specific Programme™ for CKD, a large, cross-sectional, survey of physicians and their patients. Patients completed three patient-reported outcomes (PRO) instruments: the EuroQol 5-Dimension 3-level (EQ-5D-3L), the Kidney Disease Quality of Life (KDQOL-36) instrument and the Work Productivity and Activity Impairment questionnaire. PROs were assessed by CKD stage and Hb levels, and regression analyses were performed with CKD stage and Hb level as independent variables and PROs as outcome variables, while adjusting for age, sex, CKD stage, comorbidities and cardiovascular risk. Results Overall, 5276 patients participated in the survey, including 28% stage 4 and 36% dialysis patients. Patients with lower Hb levels more often reported problems/issues on all EQ-5D-3L domains (p<0.0001). Regression analyses showed significant associations between lower Hb levels and the probability of low (<0.8) EQ-5D-3L utility scores (p<0.0001) and low visual analog scale scores (p<0.05), indicating poorer health status. Associations were seen even when adjusting for CKD stage and other potential confounding factors. Significant associations were observed between Hb level and the 12-Item Short-Form Health Survey (SF-12) Physical Component Summary, SF-12 Mental Component Summary and the three KDQOL-36 subscales (all p<0.0001), and were confirmed using linear regression analyses adjusting for CKD stage and other potential confounders. Numerically greater work productivity losses and greater activity impairment were observed with lower Hb levels. Conclusions Lower Hb levels worsen the impact of CKD on HRQoL, and are associated with lower work productivity in patients with CKD. Assessment and treatment of anemia should be recognized as a key component of integral CKD management throughout all stages of the disease.


2020 ◽  
Author(s):  
Heleen van Haalen ◽  
James Jackson ◽  
Bruce Spinowitz ◽  
Gary Milligan ◽  
Rebecca Moon

Abstract Background Reductions in health-related quality of life (HRQoL) in patients with chronic kidney disease (CKD) are thought to be exacerbated by the low hemoglobin (Hb) levels that define anemia, a common complication of CKD. The current analysis evaluated the impact of anemia on HRQoL and work productivity in patients with non-dialysis dependent and dialysis-dependent CKD using real-world data. Methods Data were collected in France, Germany, Italy, Spain, the UK, the USA and China in 2012–2018 in the Adelphi Real World Disease Specific Programme™ for CKD, a large, cross-sectional, survey of physicians and their patients. Patients completed three patient-reported outcomes (PRO) instruments: the EuroQol 5-Dimension 3-level (EQ-5D-3L), the Kidney Disease Quality of Life (KDQOL-36) instrument and the Work Productivity and Activity Impairment questionnaire. PROs were assessed by CKD stage and Hb levels, and regression analyses were performed with CKD stage and Hb level as independent variables and PROs as outcome variables, while adjusting for age, sex, CKD stage, comorbidities and cardiovascular risk. Results Overall, 5276 patients participated in the survey, including 28% stage 4 and 36% dialysis patients. Patients with lower Hb levels more often reported problems/issues on all EQ-5D-3L domains (p<0.0001). Regression analyses showed significant associations between lower Hb levels and the probability of low (<0.8) EQ-5D-3L utility scores (p<0.0001) and low visual analog scale scores (p<0.05), indicating poorer health status. Associations were seen even when adjusting for CKD stage and other potential confounding factors. Significant associations were observed between Hb level and the 12-Item Short-Form Health Survey (SF-12) Physical Component Summary, SF-12 Mental Component Summary and the three KDQOL-36 subscales (all p<0.0001), and were confirmed using linear regression analyses adjusting for CKD stage and other potential confounders. Numerically greater work productivity losses and greater activity impairment were observed with lower Hb levels. Conclusions Lower Hb levels worsen the impact of CKD on HRQoL, and are associated with lower work productivity in patients with CKD. Assessment and treatment of anemia should be recognized as a key component of integral CKD management throughout all stages of the disease.


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