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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: Environ Int. 2018 Sep 1;121(Pt 1):71–84. doi: 10.1016/j.envint.2018.08.051

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)