Table 1.
Study characteristics for articles reporting median delay from symptom onset to axSpA diagnosis (n = 25)
| Author | Year | Country | Sample size | Average age | Gender | Definition | |||
|---|---|---|---|---|---|---|---|---|---|
| At time of study | At disease onset | At diagnosis | Male % | M:F | |||||
| Seo et al. | 2014 | South Korea | 94 | 40 (IQR 39–49) | 23 (IQR 17–30) | 35 (IQR 24–43) | 78.7 | - | axSpA |
| Forejtova et al. | 2008 | Czech Republic | 979 | 50.2 (SD 10.7) | 27.3 (SD 8.5) | - | 62.2 | 1.65:1 | AS |
| Bakland et al. | 2011 | Norway | 677 | - | 23.2 (SD 8.5) | - | - | 3.1:1 | AS |
| Fallahi et al. | 2016 | Iran | 163 | 37.7 (SD 9.9) | 23.4 (SD 7.1) | 31.3 (SD 9.7) | 79 | - | AS |
| Hamilton et al. | 2011 | UK | 807 | - | - | - | - | 3:1 | AS |
| Merino et al. | 2021 | Spain | 469 | 46.0 (SD 11.0) | 23.8 (SD 8.5) | 32.2 (SD 9.5) | 52.9 | - | axSpA |
| Aggarwal et al. | 2009 | India | 70 | - | 23 (SD 8.8) | 31.5 (SD 8.7) | 84.3 | 5:1 | AS |
| Brandt et al. | 2007 | Germany | 350 | 40 (range 16–75) | - | - | - | - | axSpA |
| Sykes et al. | 2015 | UK | 1193 | - | - | - | - | - | axSpA |
| Gerdan et al. | 2012 | Turkey | 393 | 39.3 (SD 10.8) | - | - | 65.6 | - | AS |
| Limsakul et al. | 2021 | Thailand | 177 | 39.5 (SD 10.4) | 28.5 (SD 9.6) | 36.1 (SD 10.5) | 62.1 | - | axSpA |
| Garrido-Cumbrera et al. | 2019 | Europe | 2846 | 43.9 (SD 12.3) | 26.2 (SD 11.1) | 33.7 (SD 11.5) | 38.6 | - | axSpA |
| Zengin et al. | 2021 | Turkey | 308 | 36 (IQR 31–45) | - | 31 (IQR 27–40) | 58.8 | - | axSpA |
| Ozgocmen et al. | 2009 | Turkey | 279 | 36.11 (SD 10.2) | 25.63 (SD 7.49) | 30.7 (SD 9.42) | 73 | - | AS |
| Omair et al. | 2017 | Saudi Arabia | 134 | - | 26 (IQR 20–33) | 30 (25-38) | 67.2 | - | axSpA |
| Redeker et al. | 2019 | Germany | 4471 | 55.9 | 30.6 | - | 54.1 | - | axSpA |
| Li et al. | 2019 | China | 208 | 35.5 (SD 12.8) | 28.1 (SD 12.3) | - | 71.6 | - | axSpA |
| Salvadorini et al. | 2012 | Italy | 135 | - | 28.3 (SD 10.2) | 26.5 (SD 12.2) | - | 90:45 | axSpA |
| Bodur et al. | 2010 | Turkey | 1381 | 39.5 (SD 10.7) | 27.5 (SD 9.8) | 32 (SD 10.7) | 75.2 | - | AS |
| Masson Behar et al. | 2016 | France | 432 | - | 29.3 (SD 12.2) | 34.2 (SD 12.5) | 56.2 | - | AS |
| Qian et al. | 2017 | China | 1251 | - | 29.2 (11.4) | 33.5 (12.6) | 73.2 | - | AS |
| Reddy et al. | 2020 | India | 100 | 32 (IQR 26.0–36.7) | - | - | 68 | - | axSpA |
| Kong et al. | 2021 | China | 270 | 32 (IQR 26–40) | 22.5 (16–29) | - | 78.9 | - | AS |
| Hur et al. | 2021 | South Korea | 1012 | - | - | - | 75.8 | - | AS |
| Sorensen et al. | 2014 | Denmark | 1335 | 40.8 (SD 12.4) | - | - | 70.9 | - | AS |