Full cohort | 2008/2009 | 1-year follow-up | 3-year follow-up | |
N sent questionnaire | N/A | 2808 | 1593 | 1499 |
N responded | N/A | 2344 | 1333 | 1161 |
Participation rate (%) | N/A | 83 | 84 | 77 |
N included in study | 3265 | 1837 | 1238 | 1056 |
N women (%) | 2345 (72) | 1322 (72) | 879 (71) | 773 (73) |
Median year of diagnosis (Q1–Q3) | 2006 (2002–2011) | 2002 (2000–2005) | 2012 (2010–2015) | 2011 (2009–2013) |
Median age at diagnosis (Q1–Q3) | 56 (46–63) | 54 (44–61) | 60 (48–67) | 58 (47–65) |
Median age at questionnaire (Q1–Q3) | 61 (50–67) | 61 (51–67) | 61 (49–68) | 61 (50–68) |
Median time in bed (Q1–Q3) | 8.0 (7.5–9.0) | 8.0 (7.5–9.0) | 8.0 (7.3–9.0) | 8.0 (7.3–9.0) |
Reported problems (%) | ||||
Total observations | 4131 | 1837 | 1238 | 1056 |
Global sleep score | 1578 (38) | 759 (41) | 444 (36) | 375 (36) |
Sleep problems | 1010 (25) | 502 (28) | 274 (22) | 234 (22) |
Non-restorative sleep | 718 (18) | 349 (19) | 216 (18) | 153 (15) |
Insomnia | 454 (11) | 219 (12) | 117 (9) | 118 (11) |
Insufficient sleep | 398 (10) | 184 (10) | 102 (8) | 112 (11) |
Sleep quality perceived poor | 775 (19) | 355 (19) | 214 (17) | 206 (20) |
Sleep considered health problem | 809 (20) | 382 (21) | 232 (19) | 195 (19) |
RA, rheumatoid arthritis.