Progression* | No of intervals out of all 2 year intervals (n (%)) (n=520) | No of patients during all 2 year intervals (maximum progression)† (n (%)) (n=186) | No of patients from the ‘12 year completers’ during all 2 year intervals (maximum progression)† (n (%)) (n=68) | No of patients during the first 2 year interval (Y0–Y2) (n (%)) (n=164) |
---|---|---|---|---|
0 mSASSS units | 204 (39) | 45 (24) | 12 (18) | 75 (46) |
>0 and <1 mSASSS units‡ | 0 (0) | 8 (4) | 1 (1) | 11 (7) |
≥1 mSASSS unit | 282 (54) | 133 (72) | 54 (79) | 78 (48) |
≥2 mSASSS units (mean progression)§ | 152 (29) | 86 (46) | 39 (57) | 36 (22) |
≥1 and <3 mSASSS units | 161 (31) | 60 (32) | 21 (31) | 20 (12) |
≥3 mSASSS units | 121 (23) | 73 (39) | 33 (49) | 42 (26) |
≥3 and <5 mSASSS units | 58 (11) | 32 (17) | 12 (18) | 16 (10) |
≥5 mSASSS units | 63 (12) | 41 (22) | 21 (31) | 41 (25) |
*Categories of progression are not mutually exclusive.
†Number and proportion of patients whose maximum 2 year progression score, during follow-up (up to 12 years), met the criterion of each of the rows.
‡This category of progression existed because of imputations, which made some status scores, and hence progression scores, have decimal values.
§Mean progression taking all 2 year intervals into account.
mSASSS, modified Stoke Ankylosing Spondylitis Spine Score.