Table 1.
Characteristics of patients analysed by type of surgery
| Mesh group | Non‐mesh group | |
|---|---|---|
| 88 996 | 3432 | |
| Follow up (years), median (IQR) | 8.7 (6.8–8.7) | 9.9 (7.4–9.9) |
| Year of operation, n (%) | ||
| 2006 | 5410 (6.1) | 728 (21.3) |
| 2007 | 11 823 (13.3) | 618 (18.1) |
| 2008 | 13 129 (14.8) | 486 (14.2) |
| 2009 | 12 850 (14.4) | 400 (11.7) |
| 2010 | 12 317 (13.8) | 341 (9.9) |
| 2011 | 11 803 (13.3) | 294 (8.6) |
| 2012 | 11 060 (12.4) | 282 (8.2) |
| 2013 | 10 604 (11.9) | 283 (8.1) |
| Missing | 0 (0.0) | 0 (0.0) |
| Age at time of operation (years), average ± SD | 53.1 ± 12 | 52.2 ± 12 |
| Missing, n (%) | 41 (0.0) | 43 (1.3) |
| Socioeconomic deprivation, national quintiles, n (%) | ||
| 1 Most deprived | 14 590 (16.4) | 621 (18.1) |
| 2 | 16 868 (19.0) | 664 (19.4) |
| 3 | 18 746 (21.1) | 683 (19.9) |
| 4 | 19 316 (21.7) | 720 (20.9) |
| 5 Least deprived | 19 059 (21.4) | 713 (20.8) |
| Missing | 417 (0.5) | 31 (0.9) |
| Number of comorbidities, n (%) | ||
| 0 | 70 973 (79.8) | 2681 (78.1) |
| 1 | 15 550 (17.5) | 649 (18.9) |
| 2 | 2070 (2.3) | 77 (2.2) |
| 3+ | 403 (0.5) | 25 (0.7) |
| Missing | 0 (0.0) | 0 (0.0) |
| Ethnicity, n (%) | ||
| White | 82 807 (93.1) | 3182 (92.9) |
| Asian/Asian British | 1988 (2.2) | 83 (2.3) |
| Black/Black British | 7047 (0.8) | 47 (1.3) |
| Other | 1317 (1.5) | 54 (1.6) |
| Missing | 2177 (2.5) | 66 (1.9) |
IQR, interquartile range; SD, standard deviation.