There was an inconsistency between the model coefficients for cotinine in table 5 and the adjusted cotinine concentrations reported in table 6. This is because the data in table 6 had been converted to SI units but the coefficients had not been changed in table 5. The correct coefficients are shown in this revised table. The authors state that they do not affect the conclusions of the paper.
Revised Table 5 Modelled changes in non-smokers. Figures are regression coefficients (95% confidence intervals) for cotinine concentrations and rate ratios (95% confidence intervals) for respiratory and sensory symptoms
|
|
Regression coefficient or rate ratio (95% CI) |
P value |
|
Cotinine concentrations (nmol/l) (n=131) |
||
|
Region (Republic: |
0.12 (-8.9 to 9.2) |
0.978 |
|
Time period (follow-up: baseline) |
-11.3 (-20.6 to -2.0) |
0.017 |
|
Live with smoker (yes: no) |
9.2 (3.5 to 14.9) |
0.002 |
|
Hours worked in past 2 days |
0.41 (0.09 to 0.74) |
0.011 |
|
Age (years) |
-0.20 (-0.40 to 0.00) |
0.053 |
|
Sex (female: male) |
5.3 (-1.6 to 12.2) |
0.134 |
|
Interaction between region and time period |
-13.6 (-23.7 to -3.5) |
0.008 |
|
Constant |
35.1 (24.1 to 46.1) |
<0.001 |
|
Respiratory symptoms (n=158) |
||
|
Region (Republic: |
1.96 (1.11 to 3.48) |
0.021 |
|
Time period (follow-up: baseline) |
1.22 (0.72 to 2.08) |
0.447 |
|
Age (years) |
1.00 (0.99 to 1.01) |
0.487 |
|
Sex (female: male) |
0.44 (0.28 to 0.69) |
<0.001 |
|
Interaction between region and time period |
0.60 (0.35 to 1.04) |
0.070 |
|
Sensory symptoms (n=158) |
||
|
Region (Republic: |
1.14 (0.77 to 1.70) |
0.507 |
|
Time period (follow-up: baseline) |
0.57 (0 .47 to 0.71) |
<0.001 |
|
Age (years) |
0.99 (0.98 to 1.00) |
0.063 |
|
Sex (female: male) |
0.86 (0.60 to 1.22) |
0.398 |
|
Hours worked in past week |
0.99 (0.98 to 1.00) |
0.089 |
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