Table 1—

Number of cases and incidence of asthma by age in female cleaners and administrative workers

Age yrs<Cleaners><Administrative workers>
CasesPopulation#Incidence·1000·yr−1CasesPopulation#Incidence·1000·yr−1
25–39562 (23)18134 (34)2.26 (2.08–2.46)2141 (41)104250 (51)1.53 (1.47–1.60)
40–49868 (36)18977 (35)3.48 (3.25–3.71)1837 (35)66857 (33)2.16 (2.06–2.26)
50–59984 (41)16597 (31)4.44 (4.17–4.73)1257 (24)31644 (16)3.15 (2.98–3.33)
All2414 (100)53708 (100)3.35 (3.22–3.49)5235 (100)202751 (100)1.98 (1.92–2.03)
  • Data are presented as n (%) or incidence (95% confidence interval)

  • #: population refers to the arithmetic mean of the population under follow-up in the 1985, 1990 and 1995 censuses