Variable | AS-FDR(N=206)% | NHANES (N=772)% | Unadjusted OR (95% CI) | *P | Adjusted OR (95% CI) | **p |
---|---|---|---|---|---|---|
Male | 40.8 | 45.9 | 0.81 (0.60, 1.11) | 0.19 | 0.82 (0.60, 1.12) | 0.20 |
If you do not take any medicine when you wake up from sleep how long do or did you have stiffness | 0.005 | 0.004 | ||||
Less than 10 minutes | 13.0 | 20.0 | N/A | N/A | ||
10 to 30 minutes | 20.8 | 21.2 | N/A | N/A | ||
31 to 60 minutes | 14.1 | 14.5 | N/A | N/A | ||
More than 1 but less than 4 hours | 16.2 | 15.3 | N/A | N/A | ||
More than 4 hours | 14.1 | 18.9 | N/A | N/A | ||
Don’t/didn’t have morning stiffness | 21.4 | 10.6 | N/A | N/A | ||
If you do not take any medicine and not working or exercising what usually happens to the pain aching or stiffness over the course of the day? | <0.0001 | <0.0001 | ||||
Increases | 22.5 | 26.8 | Ref | Ref | ||
Decreases | 19.4 | 22.7 | 1.02 (0.63, 1.65) | 1.05 (0.64, 1.70) | ||
Stays the Same | 21.9 | 40.0 | 0.66 (0.41, 1.04) | 0.66 (0.42, 1.04) | ||
It varies, no pattern | 36.2 | 10.6 | 4.09 (2.58, 6.47) | 4.10 (2.59, 6.51) | ||
If you do not take any medicine does your pain aching or stiffness often wake you up after you have been sleeping for 4 or more hours? | <0.0001 | <0.0001 | ||||
No | 39.2 | 15.2 | Ref | Ref | ||
Yes | 57.2 | 74.8 | 0.90 (0.20, 0.45) | 0.29 (0.19, 0.45) | ||
I sleep less than 4 hours | 3.61 | 10.03 | 0.14 (0.06, 0.34) | 0.14 (0.06, 0.33) | ||
Does your pain aching or stiffness usually get better when you do either walking or stretching for a half hour? | 0.59 | 0.49 | ||||
No | 27.4 | 30.6 | Ref | Ref | ||
Yes | 67.5 | 65.4 | 1.15 (0.81, 1.64) | 1.2 (0.84, 1.72) | ||
Do not do these activities | 5.08 | 4.00 | 1.42 (0.65, 3.09) | 1.44 (0.66, 3.14) | ||
Does the pain aching or stiffness in your buttocks ever switch from one side to the other? | 33.5 | 32.5 | 1.05 (0.69, 1.59) | 0.82 | 1.04 (0.68, 1.59) | 0.87 |
Besides injuries have you ever had pain that is in one of heel areas every day for at least two weeks? | 35.5 | 19.6 | 2.26 (1.61, 3.18) | <0.0001 | 2.30 (1.63, 3.24) | <0.0001 |
Iritis or uveitis | 4.59 | 0.65 | 7.35 (2.44, 22.2) | 0.0004 | 7.22 (2.38, 21.89) | 0.0005 |
Crohn’s disease | 0.50 | 0.39 | 1.28 (0.13, 12.39) | 0.83 | 1.20 (0.12, 11.67) | 0.88 |
Ulcerative colitis | 2.51 | 1.04 | 2.46 (0.80, 7.61) | 0.12 | 2.33 (0.75, 7.22) | 0.14 |
Psoriasis in skin or nail | 9.60 | 5.31 | 1.89 (1.07, 3.34) | 0.03 | 1.89 (1.07, 3.34) | 0.03 |
Age (in years; 20–69 only), mean (SD) | 45.9 (13.9) | 45.1 (13.6) | 1.00 (0.99, 1.01) | 0.49 | 1.00 (0.99, 1.01) | 0.46 |
Age of first pain (in years), mean (SD) | 29.0 (13.8) | 32.7 (14.1) | 1.01 (1.01, 1.03) | 0.002 | 1.02 (1.01, 1.03) | 0.002 |
*p-value based on univariable model (unadjusted).
**p-value based on multivariable model (adjusted for age and gender).