Breast cancer risk in relation to occupations with exposure to carcinogens and endocrine disruptors: a Canadian case–control study

Table 5 Breast cancer odds ratios (matched analysis) for duration (lagged) in minor sectors excluding terms for sectors likely to have low work-related risk (mass media, education, healthcare, entertainment)

Parameter	OR (95% CI)	Wald P
Duration in minor sectors, year (lagged 5 year)
Agriculture/plants	1.02 (0.99-1.05)	0.14
Agriculture/animals	1.02 (0.96-1.08)	0.54
Mining	0.82 (0.53-1.29)	0.39
Power Generation/distribution	1.02 (0.96-1.08)	0.59
Construction	1.01 (0.94-1.08)	0.84
Food manufacturing	1.02 (0.99-1.06)	0.24
Liquor/beer/wine	0.99 (0.95-1.03)	0.50
Tobacco manufacturing	0.91 (0.77-1.09)	0.30
Textile manufacturing	1.06 (0.97-1.16)	0.21
Wood manufacturing	0.77 (0.58-1.03)	0.075
Printing	1.05 (0.96-1.15)	0.27
Petroleum, petrochemical, chemical mfr	0.98 (0.93-1.03)	0.42
Plastics manufacturing (non auto)	0.86 (0.69-1.06)	0.16
Plastics manufacturing (auto)	1.09 (1.03-1.15)	0.0023
Glass, ceramic manufacturing	1.01 (0.91-1.12)	0.89
Metallurgical, metalworking and fabrication	1.01 (0.99-1.03)	0.25
Electrical and electronics manufacturing	1.03 (0.93-1.13)	0.61
Light manufacturing (jewelry, furniture	0.96 (0.84-1.09)	0.52
Retail	0.98 (0.97-1.00)	0.012
Transportation	0.98 (0.96-1.01)	0.29
Hotels and motels	0.96 (0.89-1.03)	0.23
Beauty salon/hair care	0.99 (0.95-1.02)	0.50
Drycleaning, laundry	1.02 (0.95-1.09)	0.64
Bars, gaming/gambling	1.00 (0.96-1.05)	0.91
Restaurants, food services	1.01 (0.98-1.03)	0.68
Total employment duration, year (lagged 5 year) ¹
Duration	0.97 (0.93-1.00)	0.063
Duration, squared	1.00 (1.00-1.00)	0.18

Excluded minor sectors: Media, culture; Administration: non educ.,non healthcare; Education; Healthcare; Entertainment.
Odds ratios (OR) from single model by conditional logistic regression with terms for demographic, reproductive risk factors as in Table 4 and terms for employment duration; matching on age in 3-year intervals.
OR evaluated at duration = 1year (lagged 5 year).
1. for including employment duration terms: χ2 (2df) =5.84, p=0.05.