Table I.
Study flowchart
| Study components | Patients with PAD | Controls |
|---|---|---|
| Screened, n | 68 | 42 |
| Declined or excluded, n (% screened) | 24 (of 68 = 35%) | 0 |
| Enrolled, n (% screened) | 44 (of 68 = 65%) | 42 |
| Household pairs enrolled, n (% group) | 34 (68 of 86 = 79%) | |
| Baseline questionnaire completion (% total expected) | ||
| 22-item Sino-Nasal Outcome Test | 43 (of 44 = 98%) | 39 (of 42 = 93%) |
| St George's Respiratory Questionnaires | 43 (of 44 = 98%) | 39 (of 42 = 93%) |
| Pulmonary function testing | 42 (of 44 = 95%) | 41 (of 42 = 98%) |
| Study dropout | 7 (of 44 = 16%) | 4 (of 42 = 10%) |
| Total swabs returned, n | 870 | 626 |
| Nasal swabs (2-weekly) compliance (% of total expected) | 72% (of 1144 expected) | 78% (of 745 expected) |
| Total daily symptom score data (d) | 11,397 | 11,192 |
| Daily questionnaire compliance (% of total expected) | 71% (of 16,016 expected) | 73% (of 15,288 expected) |
Compliance is shown in parentheses, represented as a % of total expected. For nasal swabs received from controls, this was calculated following protocol amendment.