Review Article

Epidemiology of Neuromyelitis Optica in the World: A Systematic Review and Meta-Analysis

Table 1

Quality assessment scores of multiple sclerosis incidence and prevalence studies.

Study (year)Q1: target population described?Q2: cases from entire population/probability sampling?Q3: response rate >70%?Q4: nonresponders clearly described?Q5: sample representative of population?Q6: data collection methods standardized?Q7: validated criteria to assess disease?Q8: were estimates given with confidence intervals?Total score

Etemadifar et al. (2014) [9]YesYesYesYesYesYesYesYes8/8
Pandit and Kundapur (2014) [13]YesYesNRYesYesNoYesNo5/8
Jacob et al. (2013) [10]YesYesYesYesYesYesYesYes8/8
Houzen et al. (2012) [14]YesYesYesYesYesYesYesYes8/8
Cossburn et al. (2012) [8]YesYesNRNAYesYesYesYes6/7
Asgari et al. (2011) [7]YesYesNRNAYesYesYesYes6/7
Cabrera-Gómez et al. (2009) [12]YesYesNRNAYesYesYesYes6/7
Cabre et al. (2009) [11]YesYesNRNAYesYesYesYes6/7
Rivera et al. (2008) [15]YesNRNRNRNRNoYesNo2/8

NR: not reported; NA: not applicable; NC: not clear.