TABLE 1

Relationship between job category and lung function for those beginning their employment pre-2003 (cohort 1) by sex and racial group

VariableNon-Asian males (n=302)Asian males (n=47)Non-Asian females (n=181)
Estimated change in % predicted FEV1 (p-value)Estimated change in % predicted FVC (p-value)Estimated change in % predicted FEV1 (p-value)Estimated change in % predicted FVC (p-value)Estimated change in % predicted FEV1 (p-value)Estimated change in % predicted FVC (p-value)
Pack-years of smoking−0.30 (<0.01)−0.13 (<0.01)−0.13 (0.27)−0.03 (0.76)−0.31 (<0.01)−0.16 (0.05)
Current smoker#−0.37 (0.56)−0.08 (0.88)−0.91 (0.70)2.9 (0.21)−0.90 (0.32)0.15 (0.86)
BMI at first PFT−0.38 (<0.01)−0.62 (<0.01)−0.66 (0.12)−1.13 (<0.01)−0.14 (0.35)−0.38 (<0.01)
BMI change since first PFT−0.45 (<0.01)−0.43 (<0.01)−0.39 (0.36)−0.38 (0.35)−0.2 (0.01)−0.27 (<0.01)
Time since first PFT−0.57 (<0.01)−0.55 (<0.01)−0.39 (0.51)0.75 (0.19)−0.30 (0.02)−0.23 (0.04)
Mixer−7.92 (<0.01)−1.78 (0.46)−13.7 (<0.01)−9.94 (0.02)4.13 (0.44)−0.70 (0.89)
Intermittent mixer2.74 (0.10)2.63 (0.07)6.19 (0.15)6.70 (0.12)2.47 (0.65)2.03 (0.69)
QA2.05 (0.79)4.06 (0.55)NANA−1.38 (0.70)−2.12 (0.52)
Interaction mixer×time since first PFT0.02 (0.96)−0.16 (0.64)0.68 (0.62)0.72 (0.59)0.00 (0.99)0.40 (0.43)
Interaction intermittent mixer×time since first PFT0.41 (0.06)0.27 (0.17)0.88 (0.34)−0.12 (0.90)−0.77 (0.12)−0.61 (0.18)
Interaction QA×time since first PFT1.3 (0.29)1.3 (0.26)NANA−0.71 (0.06)−0.75 (0.04)

Non-Asian males: mixers (n=27), intermittent mixers (n=111), quality assurance operators (QA) (n=3), other (n=161); Asian males: mixers (n=7), intermittent mixers (n=6), QA (n=0), other (n=34); non-Asian females: mixers (n=8), intermittent mixers (n=8), QA (n=20), other (n=145). FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; BMI: body mass index; PFT: pulmonary function test; NA: not applicable.#: compared with never- and ex-smokers. : compared to “others” defined as employees without employment as pre-2003 mixer, pre-2003 intermittent mixer (maintenance and supervisors) or pre-2003 QA operator.