TABLE I.
Mean (±standard error) use of handkerchiefs by cold and influenza sufferers by clock time*
|
Clock times |
|||||||
|---|---|---|---|---|---|---|---|
| Type of virus | No. of subjects | Study days | 8-11 am | 11 am-2 pm | 2-5 pm | 5-8 pm | 8-11 pm |
| Cold | 19 | 1 and 2 | 4.6 ± 0.7 | 3.6 ± 0.9 | 3.7 ± 1.0 | 3.6 ± 0.9 | 4.0 ± 0.6 |
| Cold | 19 | 3 and 4 | 4.8 ± 1.1 | 2.8 ± 0.8 | 2.8 ± 1.0 | 1.8 ± 1.0 | 1.8 ± 0.6 |
| Influenza | 3 | All | 7.1 ± 2.8 | 1.9 ± 0.6 | 2.2 ± 1.2 | 1.9 ± 1.2 | 3.7 ± 2.4 |
Data from Smith A, et al. Chronobiol Intern 1988;5:441.
*By analysis of variance, time-of-day differences in handkerchief use were statistically significant (p < 0.05) for symptomatic days 1 and 2 and 3 and 4 by cold and by influenza sufferers