TABLE 4.
Probability of having a positive pre‐screening according to individual characteristics
| Positive (n = 547) | Negative (n = 940) | |||||
|---|---|---|---|---|---|---|
| N | % | N | % | OR (95% CI) | P | |
| Age | ||||||
| 65–69 years a | 274 | 50.1 | 536 | 57.0 | 1 | |
| 70–74 years | 141 | 25.8 | 233 | 24.8 | 1.12 (0.86–1.46) | .39 |
| 75–79 years | 92 | 16.8 | 113 | 12.0 | 1.51 (1.10–2.08) | .01 |
| 80–85 years | 40 | 7.3 | 58 | 6.2 | 1.15 (0.74–1.79) | .55 |
| Sex | ||||||
| Femalea | 310 | 56.7 | 572 | 60.9 | 1 | |
| Male | 237 | 43.3 | 368 | 39.1 | 1.22 (0.97–1.53) | .08 |
| Education | ||||||
| Primary or lessa | 144 | 26.3 | 153 | 16.3 | 1 | |
| Secondary | 227 | 41.5 | 379 | 40.3 | 0.70 (0.52–0.95) | .02 |
| Undergraduate | 116 | 21.2 | 263 | 28.0 | 0.52 (0.37–0.73) | <.01 |
| Postgraduate | 60 | 11.0 | 145 | 15.4 | 0.48 (0.33–0.72) | <.01 |
| Traffic | ||||||
| Unpaid sourcesa | 219 | 40.0 | 437 | 46.5 | 1 | |
| Google Display | 176 | 32.2 | 299 | 31.8 | 1.33 (0.91–1.94) | .14 |
| Adwords | 88 | 16.1 | 106 | 11.3 | 1.40 (0.94–2.10) | .10 |
| 64 | 11.7 | 98 | 10.4 | 0.99 (0.65–1.50) | .95 | |
| Country | ||||||
| Sloveniaa | 225 | 41.1 | 428 | 45.5 | 1 | |
| Spain | 191 | 34.9 | 337 | 35.9 | 0.83 (0.57–1.21) | .33 |
| Sweden | 43 | 7.9 | 82 | 8.7 | 0.82 (0.51–1.31) | .41 |
| Netherlands | 74 | 13.5 | 66 | 7.0 | 1.47 (0.92–2.37) | .11 |
| Germany | 14 | 2.6 | 27 | 2.9 | 0.95 (0.46–1.93) | .88 |
Notes: Odds ratios (OR) and 95% confidence interval (CI) estimates adjusted for all variables in the table using an unconditional logistic regression model.
a
Reference category.