Table 1. Baseline characteristics of women invited to the PSMAR breast cancer screening program in the BHA (Basic Health Areas) affected by the COVID-19 pandemic in the area of reference of Parc de Salut Mar (PSMAR), in Barcelona, Spain in the period 2012–2021 by screening round.
| Pre-COVID 4 round | Pre-COVID 3 round | Pre-COVID 2 round | Pre-COVID 1 round | Pre-COVID total | Post-COVID +1 round | Difference post–pre | Dif | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (2012–2013) | (2014–2015) | (2016–2017) | (2018–2019) | (2012–2019) | (2020–2021) | ||||||||||
| n | % | n | % | n | % | n | % | n | % | n | % | ||||
| Age group | 50–54 | 9103 | 31.79 | 9495 | 32.55 | 9451 | 32.25 | 9013 | 31.41 | 37,062 | 32.00 | 8743 | 30.17 | −1.83 | ^ |
| 55–59 | 7153 | 24.98 | 7345 | 25.18 | 7569 | 25.83 | 7631 | 26.59 | 29,698 | 25.65 | 7899 | 27.26 | 1.61 | ^ | |
| 60–64 | 6687 | 23.36 | 6573 | 22.53 | 6692 | 22.84 | 6666 | 23.23 | 26,618 | 22.99 | 6831 | 23.57 | 0.59 | ^ | |
| 65–70 | 5688 | 19.87 | 5756 | 19.73 | 5593 | 19.09 | 5387 | 18.77 | 22,424 | 19.36 | 5504 | 18.99 | −0.37 | ||
| Socioeconomic index level | Low | 4458 | 15.57 | 4472 | 15.33 | 4371 | 14.92 | 4371 | 15.23 | 17,672 | 15.26 | 4536 | 15.65 | 0.39 | |
| 2303 | 8.04 | 2356 | 8.08 | 2329 | 7.95 | 2338 | 8.15 | 9326 | 8.05 | 2506 | 8.65 | 0.59 | ^ | ||
| Middle-high | 15,209 | 53.12 | 15,668 | 53.71 | 15,864 | 54.13 | 15,557 | 54.21 | 62,298 | 53.80 | 15,600 | 53.84 | 0.04 | ||
| High | 6661 | 23.26 | 6673 | 22.88 | 6741 | 23.00 | 6431 | 22.41 | 26,506 | 22.89 | 6335 | 21.86 | −1.03 | ^ | |
| Type of screening | |||||||||||||||
| Prevalent | First invitation | 4409 | 15.40 | 4571 | 15.67 | 4271 | 14.57 | 3831 | 13.35 | 17,082 | 14.75 | 5114 | 17.65 | 2.90 | ^ |
| Previous nonparticipant | 8497 | 29.68 | 8639 | 29.62 | 9049 | 30.88 | 9012 | 31.40 | 35,197 | 30.39 | 8456 | 29.18 | −1.21 | ^ | |
| Total | 12,906 | 45.08 | 13,210 | 45.29 | 13,320 | 45.45 | 12,843 | 44.75 | 52,279 | 45.15 | 13,570 | 46.83 | 1.69 | ||
| Incident | Regular participant | 13,410 | 46.84 | 13,478 | 46.21 | 13,495 | 46.05 | 13,390 | 46.66 | 53,773 | 46.44 | 13,070 | 45.10 | −1.33 | ^ |
| Irregular participant | 2315 | 8.09 | 2481 | 8.51 | 2490 | 8.50 | 2464 | 8.59 | 9750 | 8.42 | 2337 | 8.07 | −0.35 | ||
| Total | 15,725 | 54.92 | 15,959 | 54.71 | 15,985 | 54.55 | 15,854 | 55.25 | 63,523 | 54.85 | 15,407 | 53.17 | −1.69 | ||
| Total | 28,631 | 100.00 | 29,169 | 100.00 | 29,305 | 100.00 | 28,697 | 100.00 | 115,802 | 100.00 | 28,977 | 100.00 | |||
Pre-COVID totals calculated as the sum of the four pre-COVID screening rounds. Percentages show the distribution for the columns of each variable. p values obtained with chi-square test comparing the total pre- and post-COVID proportions <0.001 for all variables. Dif = '^' indicates a statistically significant difference of p < 0.05 between columns of the respective category.