Table 2 Subjects’ characteristics in accurate and inaccurate spinous interspace identification
Actual interspace is one level lower than assumed | 95% CI † | Actual interspace is the same as assumed | 95% CI | Actual interspace is one level higher than assumed | 95% CI | One-way ANOVA P value | Correlation analysis | ||
|---|---|---|---|---|---|---|---|---|---|
Kendall’s tau-b(τ) | P value of the correlation | ||||||||
Height; cm | 166.7 (8.3) | 160.7,172.6 | 162.6 (7.4) | 159.8,165.4 | 163.7 (5.8) | 160.2,167.2 | 0.307 | −0.070 | 0.535 |
Weight; kg | 60.4 (13.1) | 51.0,69.7 | 60.9 (9.6) | 57.2,64.6 | 68.8 (11.8) | 61.6,75.9 | 0.081 | 0.206 | 0.066 |
Abdominal Circumference; cm | 82.8 (13.5) | 73.1,92.4 | 85.0 (9.5) | 81.3,88.6 | 94.0 (12.1) | 86.6,101.3 | 0.029* | 0.267 | 0.016** |
BMI; kg/m2 | 21.6 (4.1) | 18.7,24.6 | 22.9 (3.3) | 21.7,24.2 | 25.9 (3.9) | 23.5,28.2 | 0.015* | 0.304 | 0.006** |
Age; yrs | 41.5 (15.8) | 30.2,52.8 | 44.4 (14.6) | 38.9,50.1 | 59.6 (9.0) | 54.2,65.0 | 0.003* | 0.342 | 0.002** |
Cobb Angle in lateral position | 2.9(0) | −0.6,6.4 | 6.2(7.5) | 3.3,9.1 | 12.7(11.2) | 5.9,19.4 | 0.016* | 0.329 | 0.005** |
Cobb Angle in hyperflexion position | 17.5(8.7) | 11.3,23.7 | 20.0(9.1) | 16.5,23.4 | 23.5(15.1) | 14.3,32.6 | 0.413 | 0.116 | 0.301 |
Cobb Angle between lateral and hyperflexion; degrees | 14.6 (9.3) | 7.9,21.3 | 13.7 (9.9) | 10.0,17.5 | 10.8 (9.3) | 5.2,16.4 | 0.573 | −0.111 | 0.326 |
Distance from palpation point to iliac crest; mm | 24.1 (18.6) | 10.8,37.4 | 27.8 (20.7) | 20.0,35.7 | 30.8 (19.1) | 19.2,42.4 | 0.705 | 0.115 | 0.297 |