Table 4

Distribution of observations across levels of independent variables included in models of Methodological Standards Reporting and Regulatory Compliance Reporting indices in 490 amyotrophic lateral sclerosis studies

VariableLevelnPercentage
Year20057713.58
20078114.29
20098314.64
201110618.69
201311520.28
201510518.52
Study typeConcept46081.13
Preclinical10718.87
CountryAustralia142.47
Belgium142.47
Canada295.11
China284.94
France183.17
Germany254.41
Israel183.17
Italy508.82
Japan6511.46
Other437.58
South Korea254.41
Spain152.65
Sweden122.12
UK234.06
USA18833.16
Journal Brain 91.59
Brain Res 203.53
Eur J Neurosci 81.41
Exp Neurol 315.47
Front Cell Neurosci 122.12
Hum Mol Gen 244.23
J Biol Chem 193.35
J Neurochem 152.65
J Neuroinflamm 91.59
J Neurosci 203.53
J Neurosci Res 91.59
Mol Neurodegener 81.41
Neurobiol Dis 346.00
Neurosci 152.65
Other27147.80
PLOS One 457.94
Proc Natl Acad Sci USA 183.17
Severity1142.5
2203.5
3468.1
434660.8
56411.2
Inconclusive7913.9