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. 2016 Jul 13;11(7):e0159129. doi: 10.1371/journal.pone.0159129

Table 2. Summary of each of the 29 studies included in the analysis of comparing costs.

Reference Study population Cost-of-illness methodology Cost estimates
First author, Year, Country Source population Definition of MS Method of calculation Data sources Specification of costs Direct costs Indirect cost Total costs
Auty [33] 1998, Canada MS patients recruited from MS centers (n = 198; response rate not given) MS diagnosis according to Poser criteria Bottom up, Prevalence Patients and family via Case Report Form; Clinical charts and summaries on medical history; Price lists; Market prices; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild $2,250; Moderate $1,969; Severe $7,233 Mean annual cost per patient: Mean annual cost per patient $29,109
EDSS ≤2.5 (n = 62); EDSS 3–6 (n = 68); EDSS ≥6.5 (n = 68) Direct non-medical Mild $912; Moderate $1,663; Severe $7,787 Mild $11,360; Moderate $18,068; Severe $22,002 Mild $14,522; Moderate $21,698; Severe $37,024
Berg [25] 2006, Sweden MS patients recruited from patients´ organization register (n = 1,339, 64% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists; Personal communication; Statistics on wages Direct health care costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €15,186 Mean annual cost per patient €17,151 Mean annual cost per patient €53,601
EDSS 0–3 (29%); EDSS 4–6.5 (45.5%); EDSS 7–9 (25.2%) RRMS Progressive MS Direct non-medical €21,264
Casado [34] 2006, Spain MS patients recruited from one MS center (n = 200, 44% response rate) n/a Bottom up, Prevalence Patients via questionnaire; Inpatient records; Price lists from health care; Statistics on wages; Market prices for pharmaceuticals Direct costs, indirect costs, informal care costs Mean annual cost per patient €15,860 Mean annual cost per patient €8,412 Mean annual cost per patient €24,272
EDSS 0 (n = 23); EDSS 1–3 (n = 107); EDSS 3.5–5.5 (n = 42); EDSS 6–7 (n = 17); EDSS 7.5–9.5 (n = 11) RRMS, SPMS, PPMS Stage 1 €8,706; Stage 2 €12,221; Stage 3 €18,724; Stage 4 €24,037; Stage 5 €37,062 Stage 1 €5,621; Stage 2 €6,616; Stage 3 €9,596; Stage 4 €17,161; Stage 5 €15,779 Stage 1 €14,327; Stage 2 €18,837; Stage 3 €27,869; Stage 4 €41,198; Stage 5 €52,841
Blahova Dusankova [26] 2012, Czech Republic MS patients recruited from MS centers (n = 1,027, 89% response rate) Diagnosis of MS according to the 2005 revised McDonald criteria Bottom up, Prevalence Patients via questionnaire; Medical records; Price lists from health care Direct health care costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical €6,296 Mean annual cost per patient €5,519 Mean annual cost per patient €12,272
EDSS 0–3.5 (n = 579); EDSS 4–6.5 (n = 246); EDSS 7–9.5 (n = 87) RRMS, SPMS, PPMS/RPMS Direct non-medical €457
Henriksson [35] 2001, Sweden MS patients recruited from one MS center (n = 413, 76% response rate) Definite clinical MS according to Poser criteria Bottom up, Prevalence Patients via questionnaire; Medical records; Price lists from health care; Community price lists; Personal communication; Statistics on wages Direct costs, indirect costs, intangible costs Annual cost per patient €35,728 Annual cost per patient €17,518 Annual cost per patient €53,246
EDSS ≤3 (n = 126); EDSS 3.5–6 (n = 121); EDSS ≥6.5 (n = 162) RRMS, SPMS, PPMS
Johansson [37] 2012, France MS patients recruited from MS centers (n = 248, 61% response rate) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists from health care and insurance payer; Published literature; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical €15,445; Mild €13,242; Moderate €19,845; Severe €19,491 Mean annual cost per patient €3,022 Mean annual cost per patient €20,738
EDSS 0–3 (n = 164); EDSS 4–6.5 (n = 69); EDSS 7–9 (n = 11) RRMS, SPMS, PPMS Direct non-medical €2,271; Mild €1,051; Moderate €3,967; Severe €16,049 Mild €1,715; Moderate €5,440; Severe €8,448 Mild €16,009; Moderate €29,252; Severe €43,988
Karampampa [38] 2012, Canada MS patients recruited from MS centers (n = 241, response rate not given) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists from public sources; Price lists from private providers; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild $19,837; Moderate $14,058; Severe $9,478 Mean annual cost per patient Mean annual cost per patient $37,672
EDSS 0–3 (n = 146); EDSS 4–6.5 (n = 89); EDSS 7–9 (n = 5) RRMS, SPMS, PPMS Direct non-medical Mild $3,848; Moderate $12,712; Severe $44,022 Mild $7,151; Moderate $19,853; Severe $24,480 Mild $30,836; Moderate $46,622; Severe $77,981
Karampampa [39] 2012, Spain MS patients recruited from MS centers (n = 324, 99% response rate) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Published literature; Price lists from public sources; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild €14,594; Moderate €18,924; Severe €15,845 Mean annual cost per patient Mean annual cost per patient €29,401
EDSS 0–3 (n = 209); EDSS 4–6.5 (n = 105); EDSS 7–9 (n = 10) RRMS, SPMS, PPMS Direct non-medical Mild €1,386; Moderate €12,441; Severe €22,910 Mild €4,680; Moderate €12,583; Severe €20,592 Mild €20,659; Moderate €43,948; Severe €59,347
Karampampa [40] 2012, Germany MS patients recruited from MS centers (n = 244, 63% response rate) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists from public sources; Published literature; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild €16,954; Moderate; €17,841; Severe €30,348 Mean annual cost per patient Mean annual cost per patient
EDSS 0–3 (n = 164); EDSS 4–6.5 (n = 69); EDSS 7–9 (n = 11) RRMS, SPMS, PPMS Direct non-medical Mild €1,163; Moderate €12,373; Severe €22,926 Mild €3,057; Moderate €9,710; Severe €10,996 Mild €21,174; Moderate €39,923; Severe €64,270
Karampampa [41] 2012, Italy MS patients recruited from MS centers (n = 251, 83% response rate) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists from public sources; Regional tariffs; Published literature; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild €21,418; Moderate €30,507; Severe €13,646 Mean annual cost per patient Mean annual cost per patient €26,041
EDSS 0–3 (n = 203); EDSS 4–6.5 (n = 44); EDSS 7–9 (n = 4) RRMS, SPMS, PPMS Direct non-medical Mild €447; Moderate €5,634; Severe €15,826 Mild €596; Moderate €5,185; Severe €10,120 Mild €22,461; Moderate €41,327; Severe €39,592
Karampampa [42] 2012, UK MS patients recruited from MS centers (n = 194, 33% response rate) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists from public sources; Published literature; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical Mild £6,714; Moderate £8,101; Severe £6,059 Mean annual cost per patient Mean annual cost per patient £21,512
EDSS 0–3 (n = 77); EDSS 4–6.5 (n = 110); EDSS 7–9 (n = 7) RRMS, SPMS, PPMS Direct non-medical Mild £1,913; Moderate £10,299; Severe £41,242 Mild £3,214; Moderate £7,494; Severe £11,717 Mild £11,841; Moderate £25,894; Severe £59,018
Karampampa [43] 2013, The Netherlands MS patients recruited from MS centers (n = 263, response rate not given) MS diagnosis (ICD-10; G35, ICD-9; 340) Bottom up, Prevalence Patients via questionnaire; Price lists; Published literature; Statistics on wages Direct medical costs, direct non-medical costs, indirect costs Mean annual cost per patient: Direct medical €12,265; Mild €11,274; Moderate €13,668; Severe €13,978 Mean annual cost per patient €20,284 Mean annual cost per patient €47,173
EDSS 0–3 (n = 122); EDSS 4–6.5 (n = 112); EDSS 7–9 (n = 29) RRMS, SPMS, PPMS Direct non-medical €14,624; Mild €4,951; Moderate €14,967; Severe €52,303 Mild €14,714; Moderate €22,421; Severe €34,188 Mild €30,938; Moderate €51,056; Severe €100,469
Kobelt [44] 2006, The Netherlands MS patients recruited from MS centers (n = 1,549, 52% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs including friction costs, intangible costs Mean annual cost per patient: Direct medical €8,371 Mean annual cost per patient €13,476 Mean annual cost per patient €29,423
EDSS 0–3 (47.9%); EDSS 4–6.5 (39.6%); EDSS 7–9.5 (11.2%) RRMS, Progressive MS Direct non—medical €7,576 Friction cost €611 Friction cost €16,600
Kobelt [45] 2006, Switzerland MS patients recruited from patients´ organization register (n = 1,101, 44% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Personal communication; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €11,237 Mean annual cost per patient €15,928 Mean annual cost per patient €41,873
EDSS 0–3 (38.3%); EDSS 4–6.5 (35.8%); EDSS 7–9 (22.8%); EDSS 8–9 (14.3%) RRMS, Progressive MS Direct non-medical €14,708
Kobelt [46] 2006, UK MS patients recruited from patients´ organization register (n = 2,048, 16% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Published literature; Market prices; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical £6,810 Mean annual cost per patient £11,174 Mean annual cost per patient £30,263
EDSS 0–3 (21.3%); EDSS 4–6.5 (59.6%); EDSS 7–9 (19.1%) RRMS, Progressive MS Direct non-medical £12,298
Kobelt [47] 2006, Austria MS patients recruited from patients´ organization register (n = 1,019, 34% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Personal communication; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €17,302 Mean annual cost per patient €14,657 Mean annual cost per patient €40,309
EDSS 0–3 (40.6%); EDSS 4–6.5 (35.6%); EDSS 7–9.5 (22.2%) RRMS, Progressive MS Direct non-medical €8,351
Kobelt [48] 2006, Germany MS patients recruited from MS centers (53%) and from one database (47%) (n = 2,793, 38% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Personal communication; Market prices; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €17,165 Mean annual cost per patient €16,911 Mean annual cost per patient €39,998
EDSS 0–3 (47.4%); EDSS 4–6.5 (35.6%); EDSS 7–9.5 (12%) RRMS, Progressive MS Direct non-medical €5,922
Kobelt [49] 2006, Italy MS patients recruited from patients´ organization register (n = 921, 52% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Personal communication; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €11,111 Mean annual cost per patient €11,310 Mean annual cost per patient €38,845
EDSS 0–3 (31.3%); EDSS 4–6.5 (47.2%); EDSS 7–9.5 (19.6%) RRMS, Progressive MS Direct non-medical €16,424
Kobelt [50] 2006, Belgium MS patients recruited from MS centers (n = 799, 38% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €12,020 Mean annual cost per patient €11,604 Mean annual cost per patient €32,466
EDSS 0–3.5 (45.5%); EDSS 4–6.5 (32.2%); EDSS 7–9.5 (19.7%) RRMS; Progressive MS Direct non-medical €8,842
Kobelt [51] 2006, Spain MS patients recruited from patients´ organization register (n = 1,848, 32% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient: Direct medical €12,142 Mean annual cost per patient €8,775 Mean annual cost per patient €33,456
EDSS 0–3 (36.1%); EDSS 4–6.5 (44.8%); EDSS 7–9 (17.7%) RRMS, Progressive MS Direct non-medical €12,540
Kobelt [52] 2006, US MS patients randomly selected from one register (n = 1,909, 48% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from public sources; Personal communication; Statistics on wages; WTP/QALY Direct medical costs, direct non-medical costs, indirect costs, intangible costs Mean annual cost per patient $29,634 Mean annual cost per patient $17,581 Mean annual cost per patient $47,215
EDSS ≤3.5 (34.8%); EDSS 4–6 (42.7%); EDSS ≥6.5 (22.1%) PPMS, RRMS, SPMS
Kobelt [53] 2009, France MS patients recruited from patients´ organization register (n = 1,355, 34% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Statistics on wages Direct costs, indirect costs Mean annual cost per patient €23,654 Mean annual cost per patient €20,730 Mean annual cost per patient €44,384
EDSS 0–3 (n = 529); EDSS 4–5 (n = 315); EDSS 6–7 (n = 354); EDSS 8–9 (n = 136) RRMS, Progressive MS
McCrone [54] 2008, UK MS patients recruited from patients´ organization register (n = 1,942, 49% response rate) MS according to patients’ own estimates Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Published literature; Statistics on wages Direct costs (service costs), indirect costs (lost employment) Mean 6.monthly cost £8,397 Mean 6.monthly cost £4,240 Mean 6.monthly cost £12,655
GNDS 0–9 (n = 192); GNDS 10–19 (n = 694); GNDS 20–29 (n = 734); GNDS 30–39 (n = 265); GNDS ≥40 (n = 43) RRMS, SPMS, PPMS, Benign MS
Orlewska [57] 2005, Poland MS patients recruited from MS centers (n = 148, response rate not given) Definite MS according to Poser criteria Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Market prices; Statistics on wages Direct costs, indirect costs Mean cost per patient per 5 months Mean cost per patient per 5 months Mean cost per patient per 5 months
EDSS <3.5 (n = 57); EDSS 4–6 (n = 56); EDSS >6.5 (n = 35) RRMS, SPMS Mild 4,069 PLN; Moderate 5,399 PLN; Severe 6,010 PLN Mild 6,886 PLN; Moderate 10,204 PLN; Severe 12,454 PLN Mild 10,954 PLN; Moderate 15,603 PLN; Severe 18,464 PLN
Palmer [58] 2013, Australia MS patients recruited from register (n = 712, 28% response rate) Self-reported MS Bottom up, Prevalence Patients via questionnaire and diary; Price lists from health care; Statistics on wages Direct personal costs, direct community/ governmental costs, nursing home and equivalent costs, informal care, indirect costs Mean annual cost per patient: Personal AUD 3,697; Community AUD 10,721; Nursing home AUD 4,384; Informal care AUD 6,857 Mean annual cost per patient AUD 23,286 Mean annual cost per patient AUD 48,945
EDSS 1–3; EDSS 4–6; EDSS 6.5–9
Reese [59] 2011, Germany MS patients recruited from one MS center (n = 144, 77% response rate) Definite MS according to McDonald diagnostic criteria Bottom up, Prevalence Patients via questionnaire; Price lists from health care; Price lists from companies; Published literature; Statistics on wages Direct medical costs, indirect costs Mean cost per patient per 3 months €5,483 Mean cost per patient per 3 months €4,846 Mean cost per patient per 3 months €10, 329
EDSS 0–1.5; EDSS 2–3.5; EDSS 4–5.5; ESSS 6–8.5 RRMS, SPMS, PPMS
Svendsen [27] 2012, Norway MS patients from one patient organization register and data from national registers (n = 423, 80% response rate) Definite MS according to Poser criteria Bottom up/Top down, Prevalence Patients via questionnaires; Price lists from health care; Medical records; Registers; Statistics on cost of labor Direct costs, indirect costs Annual cost to the society €171,387,000 Annual cost to the society €,267,588,000 Mean annual cost per patient €65,037
EDSS 0–3 (43.5%); EDSS 4–6.5 (43%); EDSS 7–9 (13.5%) RRMS, PPMS/SPMS Annual cost to the society €438,975,000
Taylor [61] 2007, Australia MS patients recruited from one MS center (n = 100, response rate not given) Definite MS according to Poser and Rose criteria, and reclassified according to McDonald criteria Bottom up, Prevalence Patients via questionnaire; Data sources for costs not given Direct costs, indirect costs Mean annual cost per patient AU$20,396 Mean annual cost per patient AU$15,085 Mean annual cost per patient AU$35,481
EDSS 0–2.5 (n = 30); EDSS 3–4.5 (n = 29); EDSS 5–6.5 (n = 22); EDSS ≥7 (n = 19) RRMS, SPMS, PPMS EDSS 0–2.5 AU$18,568; EDSS 3–4.5 AU$15,504; EDSS 5–6.5 AU$20,159; EDSS ≥ 7 AU$31,025
Jennum [24] 2012, Denmark MS patients from a national database (n = 10,849) MS diagnosis (ICD-10) Top down, Prevalence Registers on use and costs of health care; Social statistics data Direct costs, indirect costs, social transfers Mean annual cost per patient €3,465 Mean annual cost per patient €11,110 Mean annual cost per patient €14,575