Variables Items of questionnaire | SpA Cases n = 50 | Non-SpA rheumatic controls n = 150 | P | SpA Cases n = 50 | Healthy population n = 200 | p |
---|---|---|---|---|---|---|
Age | 41.8 ± 14.4 | 60.0 ± 12.5 |  < 0.001 | 41.8 ± 14.4 | 33.1 ± 12.4 | 0.010 |
Age at onset disease | 37.5 ± 12.5 | 55.7 ± 10.9 |  < 0.001 | 37.5 ± 12.5 | 41.4 ± 12.8 | 0.146 |
Sex | Â | Â | Â | Â | Â | 0.460 |
 Male | 28 (56.0) | 43 (28.7) |  | 28 (56.0) | 116 (58.0) |  |
 Female | 22 (44.0) | 107 (71.3) |  | 22 (44.0) | 84 (42.0) |  |
Do you have joint pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 27(54.0) | 16(10.7) |  | 27(54.0) | 172(86.0) |  |
 Yes | 23(46.0) | 134(89.3) |  | 23(46.0) | 28(14.0) |  |
Do you have joint swelling? |  |  | 0.104 |  |  |  < 0.001 |
 No | 27(54.0) | 98(65.3) |  | 27(54.0) | 197(98.5) |  |
 Yes | 23(46.0) | 52(34.7) |  | 23(46.0) | 3(1.5) |  |
Do you have joint swelling in more than 3 joints? | Â | Â | 0.167 | Â | Â | 0.026 |
 No | 44(88.0) | 121(80.7) |  | 44(88.0) | 193(96.5) |  |
 Yes | 6(12.0) | 29(19.3) |  | 6(12.0) | 7(3.5) |  |
Are your legs affected ? |  |  | 0.267 |  |  | 0.393 |
 No | 43(86.0) | 121(80.7) |  | 43(86.0) | 166(83.0) |  |
 Yes | 7(14.0) | 29(19.3) |  | 7(14.0) | 34(17.0) |  |
Do you have back pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 8(16.0) | 77(51.3) |  | 8(16.0) | 159(79.5) |  |
 Yes | 42(84.0) | 73(48.7) |  | 42(84.0) | 41(20.5) |  |
Do you have stiffness in back lasting for > 30? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 7(14.0) | 143(95.3) |  | 7(14.0) | 199(99.5) |  |
 Yes | 43(86.0) | 7(4.7) |  | 43(86.0) | 1(0.5) |  |
Do you have back pain a wakening you the 2nd half of the night? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 11(22.0) | 147(98.0) |  | 11(22.0) | 192(96.0) |  |
 Yes | 39(78.0) | 3(2.0) |  | 39(78.0) | 8(4.0) |  |
Does physical exercise improve your back pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 12(24.0) | 146(97.3) |  | 12(24.0) | 182(91.0) |  |
 Yes | 38(76.0) | 4(2.7) |  | 38(76.0) | 18(9.0) |  |
Does NSAIDs improve your back pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 7(14.0) | 132(88.0) |  | 7(14.0) | 173(86.5) |  |
 Yes | 43(86.0) | 18(12.0) |  | 43(86.0) | 27(13.5) |  |
Do you have anterior chest pain? | Â | Â | 0.062 | Â | Â | 0.557 |
 No | 48(96.0) | 150(100.0) |  | 48(96.0) | 190(95.0) |  |
 Yes | 2(4.0) | 0(0.0) |  | 2(4.0) | 10(5.0) |  |
Do you have buttock pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 21(42.0) | 149(99.3) |  | 21(42.0) | 192(96.0) |  |
 Yes | 29(58.0) | 1(0.7) |  | 29(58.0) | 8(4.0) |  |
Do you have red eyes now/in past? |  |  |  < 0.001 |  |  | 0.007 |
 No | 36(72.0) | 150(100.0) |  | 36(72.0) | 176(88.0) |  |
 Yes | 14(28.0) | 0(0.0) |  | 14(28.0) | 24(12.0) |  |
Do you have heel pain? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 30(60.0) | 147(98.0) |  | 30(60.0) | 190(95.0) |  |
 Yes | 20(40.0) | 3(2.0) |  | 20(40.0) | 10(5.0) |  |
Do you hav&e chronic diarrhea? | Â | Â | 0.062 | Â | Â | 0.180 |
 No | 48(96.0) | 150(100.0) |  | 48(96.0) | 198(99.0) |  |
 Yes | 2(4.0) | 0(0.0) |  | 2(4.0) | 2(1.0) |  |
Do you have urethritis ? |  |  |  < 0.001 |  |  |  < 0.001 |
 No | 41(82.0) | 150(100.0) |  | 41(82.0) | 199(99.5) |  |
 Yes | 9(18.0) | 0(0.0) |  | 9(18.0) | 1(0.5) |  |
Do you have psoriasis ? |  |  | 0.250 |  |  | 0.200 |
 No | 49(98.0) | 150(100.0) |  | 49(98.0) | 200(100.0) |  |
 Yes | 1(2.0) | 0(0.0) |  | 1(2.0) | 0(0.0) |  |
Does one of your family members have AS? | Â | Â | - | Â | Â | 0.800 |
 No | 50(100.0) | 150(100.0) |  | 50(100.0) | 199(99.5) |  |
 Yes | 0(0.0) | 0(0.0) |  | 0(0.0) | 1(0.5) |  |
Does one of your family members have psoriasis/uveitis/ chronic diarrhea? | Â | Â | - | Â | Â | 0.800 |
 No | 50(100.0) | 150(100.0) |  | 50(100.0) | 199(99.5) |  |
 Yes | 0(0.0) | 0(0.0) |  | 0(0.0) | 1(0.5) |  |
Do you have nodules ? |  |  | 0.750 |  |  | 0.407 |
 No | 50(100.0) | 149(99.3) |  | 50(100.0) | 196(98.0) |  |
 Yes | 0(0.0) | 1(0.7) |  | 0(0.0) | 4(2.0) |  |
Do you have dactylitis ? |  |  | 0.014 |  |  | 0.016 |
 No | 46(92.0) | 149(99.3) |  | 46(92.0) | 198(99.0) |  |
 Yes | 4(8.0) | 1(0.7) |  | 4(8.0) | 2(1.0) |  |