|  | 2003/04 | 2004/05 | ||
---|---|---|---|---|---|
 |  | Offspring of BEN patients, n = 102 (%) | Offspring of control patients, n = 99 (%) | Offspring of BEN patients, n = 93 (%) | Offspring of control patients, n = 96 (%) |
Gender | Men | 50.0 | 47.5 | 48.8 | 47.9 |
Age | 30–40 | 32.4 | 15.5 | 32.3 | 15.6 |
 | 41–55 | 43.1 | 57.6 | 43.0 | 58.3 |
 | 56 plus | 24.5 | 27.3 | 24.7 | 26.0 |
Place of birth | BEN village | 95.0 | 72.7 | 94.6 | 72.9 |
Smoking status | current smoker | 39.2 | 34.4 | 38.7 | 35.4 |
 | ex-smoker | 22.6 | 12.1 | 21.5 | 12.5 |
 | non-smoker | 38.2 | 53.5 | 39.8 | 52.1 |
Diabetes | Â | 7.8 | 6.1 | 5.4 | 7.3 |
Hypertension in the offspring ξ |  | 30.4 | 19.2 | 32.3 | 22.9 |
Other urinary tract diseases | kidney cancer | 2.0 | 0 | 2.2 | 0 |
 | kidney stones | 10.8 | 4.0 | 10.8 | 6.5 |
 | Pyelonephritis | 10.8 | 0 | 9.7 | 1 |
 | Hydronephrosis | 1 | 0 | 1 | 0 |
 | Cystitis | 3.9 | 5.1 | 5.4 | 5.2 |
BSA # mean (standard deviation) | 1.87 (0.22) | 1.82 (0.21) | 1.86 (0.18) | 1.81 (0.17) | Â |