Table 4.
IRT Item Parameters and Fit Statistics for PROMIS Pain Behavior Items, Excluding Subjects with 0 or 1 Global Pain Responses: Pooled WAVE-1 and ACPA Data (N=9,589)
| Slope1 | Category Threshold1 | Item Fit Statistics2 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID | Item | a1 | a2 | a3 | a4 | a5 | a6 | b1 | b2 | b3 | b4 | b5 | b6 | S-G2 | Prob_G2 | S-X2 | Prob_X2 | df |
| PAINBE2 | When I was in pain I became irritable | 0.00 | 6.24 | 9.22 | 12.20 | 15.19 | 18.17 | 0.00 | 5.48 | 6.37 | 6.06 | 3.72 | 0.08 | 122.3 | 0.0008 | 113.1 | 0.0046 | 77 |
| PAINBE3 | When I was in pain I grimaced | 0.00 | 6.70 | 9.11 | 11.52 | 13.92 | 16.33 | 0.00 | 5.91 | 6.58 | 6.36 | 4.02 | 0.17 | 97.18 | 0.0512 | 87.03 | 0.1820 | 76 |
| PAINBE6 | When I was in pain I would lie down | 0.00 | 8.44 | 10.32 | 12.20 | 14.08 | 15.97 | 0.00 | 7.43 | 7.58 | 7.48 | 5.87 | 2.87 | 78.86 | 0.4514 | 70.70 | 0.7089 | 78 |
| PAINBE8 | When I was in pain I moved extremely slowly |
0.00 | 8.76 | 11.79 | 14.82 | 17.85 | 20.87 | 0.00 | 7.40 | 8.25 | 8.17 | 6.09 | 2.87 | 95.13 | 0.0583 | 89.76 | 0.1174 | 75 |
| PAINBE9 | When I was in pain I became angry | 0.00 | 7.07 | 8.95 | 10.83 | 12.72 | 14.60 | 0.00 | 5.99 | 5.20 | 4.29 | 1.99 | −1.35 | 138.1 | 0.0000 | 112.0 | 0.0023 | 73 |
| PAINBE11 | When I was in pain I clenched my teeth | 0.00 | 5.37 | 6.72 | 8.08 | 9.43 | 10.79 | 0.00 | 5.35 | 4.36 | 4.04 | 2.53 | 0.19 | 134.2 | 0.0000 | 116.3 | 0.0016 | 75 |
| PAINBE13 | When I was in pain I tried to stay very still | 0.00 | 5.77 | 7.23 | 8.68 | 10.14 | 11.59 | 0.00 | 5.45 | 5.22 | 5.17 | 3.70 | 0.89 | 179.8 | 0.0000 | 151.1 | 0.0000 | 80 |
| PAINBE16 | When I was in pain I appeared upset or sad |
0.00 | 6.24 | 9.77 | 13.30 | 16.83 | 20.35 | 0.00 | 6.17 | 6.34 | 5.35 | 2.38 | −1.82 | 78.44 | 0.2821 | 74.10 | 0.4095 | 72 |
| PAINBE17 | When I was in pain I gasped | 0.00 | 7.77 | 10.01 | 12.26 | 14.51 | 16.75 | 0.00 | 7.43 | 6.61 | 5.32 | 2.13 | −2.74 | 65.11 | 0.7045 | 62.99 | 0.7667 | 72 |
| PAINBE18 | When I was in pain I asked for help doing things that needed to be done |
0.00 | 7.39 | 8.83 | 10.28 | 11.73 | 13.17 | 0.00 | 6.30 | 5.79 | 5.28 | 3.63 | 0.97 | 121.7 | 0.0009 | 96.56 | 0.0653 | 77 |
| PAINBE21 | When I was in pain it showed on my face (squinching eyes, opening eyes wide, fro |
0.00 | 5.99 | 9.84 | 13.70 | 17.55 | 21.40 | 0.00 | 5.87 | 6.97 | 6.51 | 3.81 | −0.32 | 117.4 | 0.0013 | 111.1 | 0.0043 | 75 |
| PAINBE22 | Pain caused me to bend over while walking |
0.00 | 5.07 | 6.36 | 7.64 | 8.93 | 10.21 | 0.00 | 4.64 | 3.32 | 2.60 | 0.81 | −1.78 | 136.3 | 0.0000 | 102.2 | 0.0137 | 73 |
| PAINBE23 | When I was in pain I asked one or more people to leave me alone |
0.00 | 5.66 | 7.15 | 8.64 | 10.13 | 11.62 | 0.00 | 5.41 | 4.10 | 3.32 | 1.53 | −1.59 | 101.7 | 0.0150 | 81.67 | 0.2279 | 73 |
| PAINBE24 | When I was in pain I moved stiffly | 0.00 | 5.91 | 7.71 | 9.51 | 11.32 | 13.12 | 0.00 | 5.54 | 6.17 | 6.60 | 5.41 | 3.39 | 97.31 | 0.0913 | 82.70 | 0.3960 | 80 |
| PAINBE25 | When I was in pain I called out for someone to help me |
0.00 | 6.37 | 7.96 | 9.54 | 11.12 | 12.70 | 0.00 | 5.77 | 4.17 | 2.64 | −0.22 | −3.53 | 103.0 | 0.0097 | 87.24 | 0.1066 | 72 |
| PAINBE26 | Pain caused me to curl up in a ball | 0.00 | 7.46 | 9.32 | 11.17 | 13.02 | 14.87 | 0.00 | 7.17 | 5.41 | 4.16 | 1.54 | −3.13 | 62.38 | 0.5691 | 49.05 | 0.9297 | 65 |
| PAINBE27 | I had pain so bad it made me cry | 0.00 | 7.98 | 10.86 | 13.75 | 16.64 | 19.52 | 0.00 | 7.50 | 5.72 | 4.20 | 1.20 | −4.30 | 44.75 | 0.9678 | 33.97 | 0.9993 | 64 |
| PAINBE28 | When I was in pain I squirmed | 0.00 | 7.47 | 9.33 | 11.18 | 13.04 | 14.89 | 0.00 | 6.85 | 6.17 | 5.72 | 3.75 | 0.56 | 85.80 | 0.1850 | 79.95 | 0.3263 | 75 |
| PAINBE29 | When I was in pain I used a cane or something else for support |
0.00 | 7.03 | 8.06 | 9.10 | 10.13 | 11.17 | 0.00 | 6.17 | 4.20 | 3.59 | 2.27 | 1.21 | 99.45 | 0.0077 | 79.75 | 0.1560 | 68 |
| PAINBE31 | I limped because of pain | 0.00 | 6.11 | 7.25 | 8.39 | 9.52 | 10.66 | 0.00 | 5.66 | 5.08 | 5.12 | 3.91 | 2.61 | 109.0 | 0.0144 | 99.89 | 0.0563 | 79 |
| PAINBE32 | When I was in pain I became quiet and withdrawn |
0.00 | 6.51 | 8.22 | 9.92 | 11.63 | 13.34 | 0.00 | 6.08 | 5.88 | 5.66 | 3.85 | 0.80 | 94.30 | 0.0878 | 86.55 | 0.2138 | 77 |
| PAINBE33 | When I was in pain I frowned | 0.00 | 6.53 | 9.05 | 11.58 | 14.10 | 16.63 | 0.00 | 6.10 | 6.91 | 7.06 | 4.79 | 1.00 | 98.22 | 0.0441 | 80.82 | 0.3310 | 76 |
| PAINBE34 | When I was in pain I asked for help when walking or changing positions |
0.00 | 8.38 | 10.01 | 11.64 | 13.27 | 14.90 | 0.00 | 7.57 | 5.51 | 3.80 | 0.90 | −8.52 | 58.40 | 0.7640 | 49.68 | 0.9441 | 67 |
| PAINBE35 | When I was in pain I groaned | 0.00 | 6.78 | 8.38 | 9.97 | 11.56 | 13.16 | 0.00 | 6.56 | 6.15 | 5.41 | 3.32 | 0.17 | 83.52 | 0.2102 | 69.00 | 0.6427 | 74 |
| PAINBE37 | When I was in pain I isolated myself from others |
0.00 | 7.93 | 10.21 | 12.50 | 14.78 | 17.06 | 0.00 | 7.72 | 7.01 | 6.55 | 4.91 | 1.42 | 113.7 | 0.0010 | 96.24 | 0.0248 | 71 |
| PAINBE38 | When I was in pain I drew my knees up | 0.00 | 6.64 | 7.74 | 8.85 | 9.95 | 11.05 | 0.00 | 6.02 | 4.45 | 3.99 | 1.70 | −1.26 | 98.46 | 0.0172 | 77.04 | 0.2915 | 71 |
| PAINBE39 | When I was in pain I moaned, whined or whimpered |
0.00 | 7.21 | 9.45 | 11.69 | 13.93 | 16.17 | 0.00 | 6.71 | 5.86 | 4.50 | 1.84 | −2.27 | 71.06 | 0.5092 | 56.33 | 0.9127 | 72 |
| PAINBE40 | When I was in pain I flung my arms or limbs around |
0.00 | 8.18 | 9.44 | 10.71 | 11.97 | 0.00 | 7.26 | 4.58 | 3.16 | 0.44 | 42.91 | 0.9619 | 41.89 | 0.9707 | 61 | ||
| PAINBE41 | When I was in pain I screamed | 0.00 | 10.52 | 12.43 | 14.33 | 16.24 | 0.00 | 9.58 | 6.63 | 4.34 | 0.06 | 29.55 | 0.9986 | 30.85 | 0.9975 | 56 | ||
| PAINBE42 | When I was in pain my upper body would tense up |
0.00 | 8.13 | 9.83 | 11.54 | 13.25 | 14.95 | 0.00 | 7.33 | 6.79 | 6.74 | 5.37 | 3.16 | 96.54 | 0.0404 | 89.68 | 0.1035 | 74 |
| PAINBE43 | When I was in pain I walked carefully | 0.00 | 5.88 | 7.50 | 9.11 | 10.73 | 12.35 | 0.00 | 5.13 | 5.32 | 5.78 | 4.85 | 3.54 | 114.2 | 0.0109 | 104.5 | 0.0477 | 82 |
| PAINBE44 | When I was in pain I bit or pursed my lips | 0.00 | 5.63 | 7.00 | 8.37 | 9.74 | 11.11 | 0.00 | 5.32 | 4.37 | 3.83 | 2.19 | −0.79 | 126.1 | 0.0002 | 102.7 | 0.0186 | 75 |
| PAINBE45 | When I was in pain I thrashed | 0.00 | 6.16 | 7.56 | 8.97 | 10.37 | 11.78 | 0.00 | 5.85 | 3.98 | 2.70 | 0.25 | −3.44 | 76.13 | 0.2084 | 63.48 | 0.5995 | 67 |
| PAINBE46 | When I was in pain I protected the part of my body that hurt |
0.00 | 7.68 | 9.12 | 10.57 | 12.01 | 13.46 | 0.00 | 6.76 | 6.93 | 7.37 | 6.37 | 4.69 | 120.9 | 0.0017 | 106.3 | 0.0220 | 79 |
| PAINBE47 | When I was in pain my body became stiff | 0.00 | 8.68 | 10.03 | 11.38 | 12.73 | 14.08 | 0.00 | 7.93 | 7.36 | 7.48 | 6.25 | 4.13 | 71.21 | 0.6645 | 61.98 | 0.8933 | 77 |
| PAINBE48 | When I was in pain I clenched my jaw or gritted my teeth |
0.00 | 9.46 | 11.62 | 13.79 | 15.95 | 18.11 | 0.00 | 8.85 | 8.17 | 7.61 | 5.56 | 2.44 | 101.7 | 0.0121 | 87.38 | 0.1047 | 72 |
| PAINBE49 | When I was in pain I winced | 0.00 | 6.36 | 8.69 | 11.02 | 13.36 | 15.69 | 0.00 | 5.89 | 6.55 | 6.63 | 4.57 | 0.87 | 106.6 | 0.0144 | 87.96 | 0.1846 | 77 |
| PAINBE50 | When I was in pain I moved my limbs protectively |
0.00 | 7.21 | 8.80 | 10.39 | 11.97 | 13.56 | 0.00 | 6.22 | 6.23 | 6.49 | 5.11 | 3.26 | 103.7 | 0.0388 | 91.12 | 0.1858 | 80 |
| PAINBE51 | When I was in pain I avoided physical contact with others |
0.00 | 7.61 | 9.83 | 12.06 | 14.28 | 16.50 | 0.00 | 6.92 | 6.28 | 5.60 | 3.94 | 0.96 | 89.19 | 0.1258 | 78.08 | 0.3812 | 75 |