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Table 1 Characteristics of included studies

From: Age at menarche and risk of multiple sclerosis (MS): a systematic review and meta-analysis

First author

Published year

Country

Type of study

No case/No control

OR(95% CI)

Ramagopalan [15]

2009

CANADA

case-control

4472/ 1101

0.89(0.83-0.94)

Salehi [12]

2018

Iran

case-control

399/541

0.92(0.84-0.99)

Rejali [16]

2016

Iran

case-control

200/ 200

0.78(67-0.89)

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BMC Neurology

ISSN: 1471-2377

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