Table 1.
Select characteristics of cohort participants by follow-up study date, Seveso Women’s Health Study, Seveso, Italy, 1976–2016
| SWHS 1996–1998 | Follow-up 2008–2009 | Follow-up 2014–2016 | |
|---|---|---|---|
| Characteristic | n (%) | n (%) | n (%) |
| Total | 981 (100) | 833 (84.9)a,b | 705 (71.9)a,c |
| Characteristics at explosion | |||
| Zone of residence | |||
| A | 167 (17.0) | 142 (17.0) | 123 (17.4) |
| B | 814 (83.0) | 691 (83.0) | 582 (82.6) |
| Age (years) | |||
| 0–10 | 232 (23.7) | 200 (24.0) | 181 (25.7) |
| 11–20 | 279 (28.4) | 252 (30.3) | 226 (32.1) |
| 21–30 | 241 (24.6) | 206 (24.7) | 175 (24.8) |
| 31–40 | 229 (23.3) | 175 (21.0) | 123 (17.4) |
| Menarche status | |||
| Premenarche | 284 (29.0) | 247 (29.7) | 221 (31.3) |
| Postmenarche | 697 (71.0) | 586 (70.3) | 484 (68.7) |
| Characteristics at interview | |||
| Age (years) | |||
| mean (SD) | 40.8 (11.7) | 52.2 (11.1) | 57.7 (11.0) |
| Range | 21 – 63 | 32 – 73 | 38 – 80 |
| Marital status | |||
| Never | 76 (7.7) | 47 (5.6) | 40 (5.7) |
| Ever | 905 (92.3) | 786 (94.4) | 665 (94.3) |
| Maternal education | |||
| ≤ Required | 651 (66.4) | 550 (66.0) | 382 (55.4) |
| Secondary school | 288 (29.4) | 249 (29.9) | 277 (40.2) |
| > Secondary school | 42 (4.3) | 34 (4.1) | 30 (5.4) |
| Menopause status | |||
| Premenopause | 703 (71.7) | 394 (47.3) | 223 (31.6) |
| Postmenopause | 278 (28.3) | 439 (52.7) | 482 (68.4) |
| Primary wage earner educationd | |||
| ≤ Required | 627 (63.9) | 529 (32.3) | 376 (54.7) |
| ≥ Secondary school | 354 (36.1) | 252 (32.1) | 311 (45.3) |
a
Percent of initial cohort (n=981)
b
16 (1.6%) deceased, 36 (3.7%) could not be located or contacted, 96 (9.8%) refused
c
33 (3.3%) deceased, 64 (6.5%) could not be located or contacted, 179 (18.3%) refused
d
Required (8 years of school), Secondary School (9–13 years), >Secondary School (>13 years)