TABLE 3.
Factors associated with response to follow-up surveys a three to 6 months after inclusion in the CI-DFU eCohort for sites with enrolment during CI study phase 2 (June to October 2020, total follow-up duration by February 2021 ranges between 5 and 8 months, depending on site). Corona Immunitas, Switzerland 2020.
| Missed/no assessment | Completed ≥1 assessment | Adjusted odds Ratio | |
|---|---|---|---|
| 530 (11.4%) | 4106 (88.6%) | [95% CI] | |
| Canton | |||
| Basel (City/Land) | 163, 7.2% | 2106, 92.8% | Ref. |
| Fribourg | 77, 25.1% | 231, 75.0% | 0.21 [0.15; 0.29] |
| Neuchâtel | 54, 19.0% | 230, 81.0% | 0.31 [0.21; 0.43] |
| Ticino | 145, 14.9% | 833, 85.2% | 0.61 [0.47; 0.80] |
| Zurich | 91, 11.4% | 706, 88.6% | 0.57 [0.43; 0.75] |
| Age categories | |||
| 20–64 years | 458, 13.4% | 2954, 86.6% | Ref. |
| 65+ years | 72, 5.9% | 1152, 94.1% | 2.73 [1.94; 3.84] |
| Sex | |||
| Female | 262, 10.4% | 2247, 89.6% | Ref. |
| Male | 268, 12.6% | 1853, 87.4% | 0.65 [0.54; 0.79] |
| Other/Missing (not included because of model convergence problems) | n.d. | n.d. | n.d. |
| Citizenship | |||
| Swiss | 346, 10.2% | 3059, 89.8% | Ref. |
| Swiss and other | 64, 11.9% | 477, 88.2% | 0.90 [0.67; 1.20] |
| Other | 120, 17.4% | 570, 82.6% | 0.62 [0.48; 0.80] |
| Has at least one child aged 18 or younger at home | 206, 15.5% | 1126, 84.5% | 0.73 [0.59; 0.90] |
| Highest school certificate | |||
| No school certificate or mandatory school | 35, 24.6% | 107, 75.4% | Ref. |
| Professional training | 163, 10.3% | 1422, 89.7% | 2.21 [1.41; 3.46] |
| Matura, baccalaureate, vocational baccalaureate | 66, 14.0% | 407, 86.0% | 2.00 [1.22; 3.28] |
| Higher technical college or university of applied sciences | 104, 10.4% | 898, 89.6% | 1.95 [1.21; 3.12] |
| University | 157, 11.2% | 1248, 88.8% | 1.93 [1.22; 3.06] |
| Does not want to answer (Ticino only) | 5, 17.2% | 24, 82.8% | 1.57 [0.53; 4.63] |
| Current monthly (gross) household income (CHF) | |||
| 0–3000 | 54, 15.9% | 285, 84.1% | Ref. |
| 3001–6000 | 128, 12.2% | 924, 87.8% | 1.34 [0.93; 1.94] |
| 6001–9000 | 135, 11.5% | 1048, 88.6% | 1.53 [1.05; 2.22] |
| 9001–12000 | 65, 8.3% | 714, 91.7% | 2.42 [1.59; 3.68] |
| 12001–15000 | 38, 9.7% | 355, 90.3% | 2.14 [1.32; 3.47] |
| 15001–18000 | 19, 8.4% | 207, 91.6% | 2.62 [1.45; 4.74] |
| 18001–21000 | 15, 16.1% | 78, 83.9% | 1.56 [0.79; 3.07] |
| 21001+ | 17, 8.3% | 188, 91.7% | 2.59 [1.41; 4.76] |
| does not want to answer (Ticino only) | 59, 16.1% | 307, 83.9% | 1.18 [0.76; 1.83] |
| Work situation | |||
| Working full- or part-time (Not working/retired as References) | 356, 12.4% | 2521, 87.6% | 1.23 [0.96; 1.58] |
| Smoking status | |||
| Smoking daily | 93, 16.5% | 472, 83.5% | Ref. |
| Smoking occasionally (i.e., not daily) | 39, 15.2% | 219, 84.9% | 1.03 [0.67; 1.58] |
| Former smoker | 113, 9.4% | 1096, 90.7% | 1.55 [1.14; 2.12] |
| Never smoked | 285, 11.0% | 2319, 89.1% | 1.34 [1.02; 1.75] |
| Has at least one self-reported chronic disease (no chronic diseases as reference) | 223, 10.2% | 1975, 89.9% | 1.10 [0.90; 1.33] |
a
Associations with response to at least one follow-up questionnaire in the month of February 2021.