Reference population | Assessment | Exposure source | Values |
Intensity of exposure | |||
Zakarian et al, 200429: mothers with children aged ≤4 years recruited in a randomised controlled trial. The time between questions was immediate and repeated at baseline, 3-month and 6-month follow-up. | CPD: asked to report their smoking on typical days during the past 7 days | Mother |
|
Emerson et al, 199518: 91 families with an asthmatic child 6–17 years old asked 2 months apart | CPD smoked at home: diary (2-week period) | Parents |
|
Zakarian et al, 200429: mothers with children aged ≤4 years recruited in a randomised controlled trial. The time between questions was immediate and repeated at baseline, 3-month and 6-month follow-up. | CPD smoked at home: in the past 7 days | Mother | r=0.97–0.98 |
Emerson et al, 199518: 91 families with an asthmatic child 6–17 years old asked 2 months apart | Average CPD to which the child is exposed at home: diary (2-week period) | Not specified | r=0.84 |
Matt et al, 200023: 22 mothers of children <2.5 years old from an ethnically diverse sample of low-income, low-education families asked 2 months apart | Weekly no. of cigarettes smoked at home: in the past 7 days | Mother | r=0.91 |
Father | r=0.87 | ||
Emerson et al, 199518: 91 families with an asthmatic child 6–17 years old asked 2 months apart | Weekly no. of cigarettes smoked at home | Parents | r=0.86 |
No. of cigarettes to which the child is exposed at home: diary (2-week period) | Parents |
| |
Weekly no. of cigarettes to which the child is exposed at home | Parents | r=0.76 | |
All smokers | r=0.81 | ||
Matt et al, 200023: 22 mothers of children <2.5 years old from an ethnically diverse sample of low-income, low-education families asked 2 months apart | Weekly no. of cigarettes to which the child is exposed at home | All sources | r=0.88 |
Mother | r=0.9 | ||
Father | r=0.81 | ||
Weekly no. of cigarettes to which the child is exposed at home and away from home | Parents and others | r=0.88 | |
Hovell et al, 200230: 204 children with asthma 3–17 years old asked 5 days apart | No. of cigarettes smoked while the child was in the same room or car | All smokers | r=0.69*** |
Zakarian et al, 200429: mothers with children aged ≤4 years recruited in a randomised controlled trial. The time between questions was immediate and repeated at baseline, 3-month and 6-month follow-up. | No. of cigarettes to which the child was exposed in the car | Mother | r=0.90–0.93 |
*p<0.05; **p<0.01; ***p<0.001.
†Percentage agreement.
CPD, cigarettes per day; κ, kappa; r, correlation coefficient.