Table 1. Demographic characteristics of respondents.
| ALS | Number (%) | Control | Number (%) | |
|---|---|---|---|---|
| Country of birth | ||||
| United States | 170 (43%) | Australia | 276 (62%) | |
| Australia | 94 (24%) | Other (<2% each) | 73 (16%) | |
| Canada | 49 (12%) | United States | 42 (9%) | |
| Other (<1% each) | 57 (14%) | United Kingdom | 28 (6%) | |
| United Kingdom | 18 (5%) | New Zealand | 15 (3%) | |
| Spain | 10 (3%) | Spain | 14 (3%) | |
| Country of residence | ||||
| United States | 179 (45%) | Australia | 338 (75%) | |
| Australia | 116 (29%) | United States | 48 (11%) | |
| Canada | 57 (14%) | Other* (<2% each) | 36 (8%) | |
| *Other (<2% each) | 37 (9%) | Spain | 14 (3%) | |
| Spain | 9 (2%) | New Zealand | 12 (3%) | |
| Ancestry | ||||
| Other (<6% each) | 184 (47%) | Other (<4% each) | 153 (34%) | |
| Australian | 60 (15%) | Australian | 130 (29%) | |
| English | 57 (15%) | English | 77 (17%) | |
| American | 36 (9%) | Irish | 40 (9%) | |
| German | 32 (8%) | British | 25 (6%) | |
| Irish | 23 (6%) | Scottish | 19 (4%) | |
| Cultural group | ||||
| American | 111 (29%) | Australian | 285 (64%) | |
| Australian | 98 (26%) | Other (<2% each) | 76 (17%) | |
| Other (<3% each) | 93 (24%) | American | 32 (7%) | |
| Canadian | 40 (10%) | English | 27 (6%) | |
| English | 28 (7%) | Spanish | 14 (3%) | |
| German | 13 (3%) | New Zealander | 11 (2%) | |
Other* (countries of residence): Argentina, Belgium, Brazil, Cape Verde, China, Colombia, Czech Republic, Denmark, Ecuador, Egypt, Finland, Germany, Iran, Ireland, Italy, Luxembourg, Mexico, Netherlands, Portugal, Russia, Slovakia, South Africa, South Korea, Sweden, Switzerland, Turkey, United Kingdom.