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Occup Environ Med 59:234-242 doi:10.1136/oem.59.4.234
  • Original article

Sperm count and chromatin structure in men exposed to inorganic lead: lowest adverse effect levels

Table 9

Subfecundity by participation in the United Kingdom sample

Questionnaire respondents Non-participants n (%) Participants n (%) p Value
Correlations are highly significant.
Infertile periods of at least 6 months 258 1 (0.8) 8 (6.3) 0,015
Urogenital disease impairing fecundity 258 3 (2.3) 4 (3.1) >0.05

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