Table 4.
Linear regression coefficients for the relation between air traffic noise exposure and morning saliva cortisol levels with regard to employment status among 230 women in six European countries.a
| Aircraft noise (dB) |
||||||
|---|---|---|---|---|---|---|
| < 50 |
50–60 |
> 60 |
||||
| Employment statusb | No. | Coefficientc (95% CI) | No. | Coefficientc (95% CI) | No. | Coefficientc (95% CI) |
| Retired | 33 | — | 24 | 0.62 (−5.18 to 6.41) | 24 | 5.38 (−0.57 to 11.33) |
| Other | 17 | 1.62 (−4.94 to 8.18) | 25 | 5.36 (−0.91 to 11.63) | 15 | 3.90 (−3.27 to 11.07) |
| Employed | 47 | 3.93 (−1.64 to 9.49) | 28 | 7.87 (1.63 to 14.11) | 17 | 16.23 (9.29 to 23.2) |
All analyses adjusted for road traffic, country, age, sex, occupational status, medication use, BMI, alcohol, diet, remedy during night, and other noise sources in living environment.
Employment status is classified categorically. “Retired” includes retired participants. “Other” includes participants on sick leave, unemployed subjects, housewives, and students. “Employed” included both full-time and part-time employment as well as self-employed working from home.
Linear regression coefficients for morning saliva cortisol level in nmol/L. Arithmetic mean cortisol level in the reference category = 19.67 nmol/L.