Table 1 Country of origin and characteristics of included articles
From: Immunoglobulin G4-related diseases in the head and neck: a systematic review
N (Articles) | % | N (Individual Cases) | % | |||
|---|---|---|---|---|---|---|
Total number of studies | 43 | 484 | ||||
Case Reports | 21 | 48.8 | 21 | 4.3 | ||
Small Case Series | 17 | 39.5 | 107 | 22.1 | ||
Large Case Series | 5 | 11.6 | 356 | 73.6 | ||
Country of Origin | North America | 10 | 23.3 | 27 | 5.6 | |
Canada | 1 | 2.3 | 1 | 0.2 | ||
USA | 9 | 20.9 | 26 | 5.4 | ||
Asia | 22 | 51.2 | 429 | 88.6 | ||
Japan | 18 | 41.9 | 419 | 86.6 | ||
Hong Kong | 2 | 4.7 | 8 | 1.7 | ||
Taiwan | 1 | 2.3 | 1 | 0.2 | ||
Singapore | 1 | 2.3 | 1 | 0.2 | ||
Oceania | 6 | 14.0 | 7 | 1.4 | ||
Australia | 5 | 11.6 | 6 | 1.2 | ||
New Zealand | 1 | 2.3 | 1 | 0.2 | ||
Europe | 4 | 9.3 | 20 | 4.1 | ||
United Kingdom | 1 | 2.3 | 1 | 0.2 | ||
Netherlands | 1 | 2.3 | 12 | 2.5 | ||
Czech Republic | 1 | 2.3 | 6 | 1.2 | ||
Switzerland | 1 | 2.3 | 1 | 0.2 | ||
South America | 1 | 2.3 | 1 | 0.2 | ||
Brazil | 1 | 2.3 | 1 | 0.2 |