Table 1.
Descriptive statistics of ALS cases and controls, Denmark January 1 1982 – December 31 2009.* Characteristics describe the cases and controls on the case (index) date.
| Cases | Controls | |
|---|---|---|
| Male sex, n (%) | 1954 (54) | 7816 (54) |
| Year of birth, mean (sd) | 1932 (14) | 1932 (14) |
| Age, mean (sd) | 65 (12) | 65 (12) |
| Residence | ||
| Copenhagen | 525 (14) | 1756 (12) |
| Copenhagen suburbs | 787 (22) | 3164 (22) |
| Aarhus/Odense | 405 (11) | 1603 (11) |
| Provincial towns | 1350 (37) | 5785 (40) |
| Rural areas | 525 (14) | 2170 (15) |
| Greenland | 6 (0.16) | 66 (0.45) |
| Unknown | 52 (1.4) | 56 (0.38) |
| SES | ||
| 1 – High | 390 (11) | 1417 (10) |
| 2 | 426 (12) | 1594 (11) |
| 3 | 710 (20) | 2764 (19) |
| 4 | 944 (26) | 3897 (27) |
| 5 – Low | 678 (19) | 2872 (20) |
| Unknown | 502 (14) | 2056 (14) |
| Marriage Status | ||
| Married | 2222 (61) | 7107 (49) |
| Unmarried | 274 (7.5) | 1203 (8.2) |
| Divorced | 359 (10) | 1519 (10) |
| Widower | 795 (22) | 4771 (33) |
*
N = 3,650 cases and 14,600 controls.