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Table 3 Associations between five-year job tenure prior to age 45, parity and prevalence of breast cancer among female flight attendantsa

From: Cancer prevalence among flight attendants compared to the general population

 

N Cases

N Non-Cases

Odds Ratio (95% CI)

Lifetime job tenure

108

2620

0.99 (0.91, 1.10)

Job tenure prior to age 45)b

90

1151

1.09 (0.91, 1.29)

Parity (lifetime job tenure)

 Nulliparous

26

1020

1.27 (0.94, 1.71)

 1 to 2

68

1376

0.95 (0.84, 1.06)

 3+

68

1161

1.22 (1.05, 1.42)

Parity (tenure prior to age 45)b

 Nulliparous

19

484

1.44 (0.83, 2.49)

 1 to 2

50

896

0.95 (0.78, 1.17)

 3+

58

848

1.39 (1.06, 1.81)

  1. aAll models are adjusted for age, overweight, education, parity and smoking history
  2. bModels for tenure prior to age 45 are restricted to participants age 45 or over