Neurology Research International

Neurology Research International / 2013 / Article

Erratum | Open Access

Volume 2013 |Article ID 129417 | https://doi.org/10.1155/2013/129417

Emily J. Hadgkiss, George A. Jelinek, Tracey J. Weiland, Naresh G. Pereira, Claudia H. Marck, Dania M. van der Meer, "Erratum to “Methodology of an International Study of People with Multiple Sclerosis Recruited through Web 2.0 Platforms: Demographics, Lifestyle, and Disease Characteristics”", Neurology Research International, vol. 2013, Article ID 129417, 5 pages, 2013. https://doi.org/10.1155/2013/129417

Erratum to “Methodology of an International Study of People with Multiple Sclerosis Recruited through Web 2.0 Platforms: Demographics, Lifestyle, and Disease Characteristics”

Received07 Jun 2013
Accepted18 Jul 2013
Published27 Aug 2013

The authors would like to make a number of corrections. During reidentification of data to allow a scheduled email to participants, a coding anomaly was detected, such that the identification and filtering out of duplicates had been incorrectly undertaken. This meant that some participants were incorrectly removed from the dataset prior to analysis while some duplicate entries had been included in analysis. Many minor changes to the results in the published paper have occurred as a result of this error. The authors apologise for any inconvenience caused.

In the abstract, on the sixth line, the figure 2519 should be changed to 2469.

Figure 1 and Tables 310 were updated as provided.


CharacteristicsNumber (%)
(unless otherwise stated)

Gender
 Male407/2303 (17.7)
 Female1896/2303 (82.3)
Age in 2012 (years)
 18–29128/2398 (5.3)
 30–39619/2398 (25.8)
 40–49779/2398 (32.5)
 50–59634/2398 (26.4)
 60–69222/2398 (9.3)
 >7016/2398 (0.7)
Country of location
 USA807/2469 (32.7)
 Australia629/2469 (25.5)
 UK417/2469 (16.9)
 NZ210/2469 (8.5)
 Canada105/2469 (4.3)
 Other*301/2469 (12.2)
Country of birth
 USA772/2461 (31.4)
 Australia508/2461 (20.6)
 UK492/2461 (20.0)
 NZ172/2461 (7.0)
 Canada106/2461 (4.3)
 Other411/2461 (16.7)
Marital status
 Married1472/2431 (60.6)
 Single359/2431 (14.8)
 Cohabitating/partnered316/2431 (13.0)
 Separated/divorced257/2431 (10.6)
 Widowed27/2431 (1.1)
Family status
 No children766/2431 (31.5)
 One or more biological children1599/2431 (65.8)
 One or more stepchildren236/2431 (9.7)
 Number of children , median (IQR)2 (0–2)
Employment status
 Employed full time800/2459 (32.5)
 Employed part time524/2459 (21.3)
 Stay at home parent/carer184/2459 (7.5)
 Student full time60/2459 (2.4)
 Unemployed196/2459 (8.0)
 Retired due to age72/2459 (2.9)
 Retired due to medical reasons or disability570/2459 (23.2)
 Other53/2459 (2.2)
Education status
 No formal schooling3/2455 (0.1)
 Primary school52/2455 (2.1)
 Secondary school549/2455 (22.4)
 Vocational training395/2455 (16.1)
 Bachelor’s degree888/2455 (36.2)
 Postgraduate degree568/2455 (23.1)

Including 52 other countries.
Including 72 other countries.
Including biological children and stepchildren.
Collapsed from the unemployed: seeking work/not seeking work.

Number (%)

Number of years since diagnosis
 <1–51098/2420 (45.4)
 6–10568/2420 (23.5)
 11–15383/2420 (15.8)
 16–20182/2420 (7.5)
 21–2596/2420 (4.0)
 26–3047/2420 (1.9)
 >3046/2420 (1.9)
Disability (PDDS)
 Normal744/2300 (32.3)
 Mild disability351/2300 (15.3)
 Moderate disability172/2300 (7.5)
 Gait disability365/2300 (15.9)
 Early cane253/2300 (11.0)
 Late cane175/2300 (7.6)
 Bilateral support138/2300 (6.0)
 Wheelchair/scooter99/2300 (4.3)
 Bedridden3/2300 (0.1)
Currently experiencing symptoms due to a recent relapse
 Yes639/2394 (26.7)
 No1431/2394 (59.8)
 Unsure324/2394 (13.5)

Definition of relapse provided to participants.

BenignRelapsing and remittingPrimary progressiveSecondary progressiveProgressive relapsingUnsure/other

Type of MS first diagnosed, number (%)99/2418 (4.1)1864/2418 (77.1)151/2418 (6.2)43/2418 (1.8)14/2418 (0.6)247/2418 (10.2)
Type of MS currently diagnosed, number (%)100/2421 (4.1)1493/2421 (61.7)175/2421 (7.2)275/2421 (11.4)48/2421 (2.0)330/2421 (13.6)


Self-diagnosed relapse rateDoctor-diagnosed relapse rate
nMean (95% CI)Median (IQR)nMean (95% CI)Median (IQR)

Number of relapses over the last 12 months*1469/14931.09 (1.01–1.17)1 (0.0–2.0)1452/14930.73 (0.67–0.78)0 (0.0–1.0)
Number of relapses over the last 5 years, annualised*1401/14930.98 (0.93–1.03)0.67 (0.4–1.2)1388/14930.66 (0.62–0.70)0.5 (0.2–1.0)

Participants with relapsing-remitting MS.

Summary score (missing)Distribution (Kolmogorov)Mean (95% CI)Median (IQR)

Overall quality of life subscore2259 (210)0.0066.9 (66.1–67.7)68.4 (55.0–81.7)
Physical health composite1937 (532)0.0059.2 (58.2–60.1)59.1 (42.5–77.4)
Mental health composite2210 (259)0.0066.7 (65.8–67.6)72.1 (51.1–84.1)


CutoffPositive, number (%, 95% CI)Negative, number (%, 95% CI)

Depression screen (PHQ-2)Negative < 3; positive ≥ 3429/2225 (19.3, 17.7–21.0)1796/2225 (80.7, 79.0–82.3)
Fatigue (FSS) mean scoreNegative < 4; positive ≥ 41402/2138 (65.6, 63.5–67.6)736/2138 (34.4, 32.4–36.5)


HOLISMNARCOMS MSBase

Female (%)82.374.971.5
Age at diagnosis (years)37.0 (median)36.9 (mean)32.2 (mean)
Age at symptom onset (years)31.0 (median)32.4 (mean)Data not provided
Age at enrolment (years)45.0 (median)42.8 (mean)42.7 (mean)
Disease duration at enrolment (years)6.0 (median)Data not provided10.4 (mean)


Country

Armenia 1
Australia 629
Austria2
Belgium5
Brazil7
Bulgaria1
Canada105
China1
Croatia7
Cyprus1
Czech Republic2
Denmark10
Estonia2
Finland4
France11
Gibraltar 2
Guam1
Germany29
Greece12
Iceland2
India3
Indonesia1
Iran1
Ireland 36
Israel2
Italy6
Kuwait1
Lebanon1
Luxembourg1
Malta2
Mexico3
Namibia1
The Netherlands27
New Zealand210
Norway13
Philippines2
Poland3
Portugal6
Puerto Rico3
Qatar1
Romania4
Russian Federation2
Saudi Arabia2
Serbia2
Singapore2
Slovakia4
Slovenia2
South Africa30
Spain9
Sweden16
Switzerland8
Syria1
Trinidad and Tobago1
Turkey1
United Arab Emirates4
United Kingdom417
United States807

There were also corrections to the Section  3 on page 5

– In the first paragraph,(i)the first sentence beginning with “A total of 3053 participants” should now read: “Following the removal of duplicate records, a total of 2996 participants;”(ii)2519 should be changed to 2469;(iii)2518 should be changed to 2468;(iv)89% should be changed to 90.4%;– In the second paragraph,(i)82.2% should be changed to 82.3%;(ii)46 should be changed to 45;(iii)38 should be changed to 37;(iv)88% should be changed to 87.8%;(v)61.1% should be changed to 60.6%;(vi)23.4% should be changed to 23.2%;(vii)64.0% should be changed to 39.0%.– In the third paragraph,(i)13 should be changed to 12;(ii)45.0% should be changed to 45.4%;(iii)61.0% should be changed to 61.7%;(iv)76.7% should be changed to 77.1%.

– In the fourth paragraph,31.7% should be changed to 32.3%.

– In the fifth paragraph(i)0.97 should be changed to 0.98;(ii)1382 should be changed to 1372;(iii)42.0% should be changed to 42.1%;(iv)31.0% should be changed to 30.8%;(v)27.0% should be changed to 27.2%.– In the sixth paragraph,(i)81.65 should be changed to 81.7;(ii)59.2 should be changed to 59.1;(iii)42.3 should be changed to 42.5;(iv)77.2 should be changed to 77.4;(v)72.0 should be changed to 72.1;(vi)51.2 should be changed to 51.1.

Corrections to the Section  3 on page 6

– In the first paragraph,(i)65.7% should be changed to 65.6%;(ii)63.7 should be changed to 63.5;(iii)67.7 should be changed to 67.6.– In the second paragraph,(i)68.4% should be changed to 67.2%;(ii)51.4% should be changed to 50.1%.

Corrections to the Section  3 on page 7

– In the first paragraph,(i)59.5% should be changed to 59.7%;(ii)38.0% should be changed to 37.8%;(iii)21.5% should be changed to 21.4%;(iv)67.0% should be changed to 66.8%;(v)82.3% should be changed to 82.4%;(vi)64.3% should be changed to 64.2%;(vii)676 should be changed to 675;(viii)30.0% should be changed to 30.1%.

Copyright © 2013 Emily J. Hadgkiss et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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