Table 3

Analysis of variance for a priori cross tabulations of individual item means by back pain experience

ItemMean by back pain experience*Significance from analysis of varianceMean difference (95% CI for difference)
No LBP (n=75)Past LBP (n=360)Current LBP (n=162)No vs pastNo vs currentPast vs current
1. Your back is one of the strongest parts of your body4.34.03.90.0700.3 (−0.1 to 0.7)0.4 (−0.0 to 0.9)0.1 (−0.2 to 0.4)
6. It is easy to injure your back4.14.54.60.000−0.4 (−0.7 to −0.1)†−0.4 (−0.8 to −0.2)†−0.1 (−0.3 to 0.1)
11. You could injure your back if you are not careful4.64.64.80.0320.0 (−0.2 to 0.2−0.2 (−0.4 to 0.0)−0.2 (−0.3 to −0.0)†
22. If you ignore back pain, you may cause damage to your back4.34.44.50.232−0.1 (−0.4 to 0.1)−0.2 (−0.4 to 0.1)−0.1 (−0.2 to 0.2)
28. Most back pain settles quickly, at least enough to get on with normal activities3.73.73.60.5820.0 (−0.3 to 0.4)0.1 (−0.3 to 0.5)0.1 (−0.2 to 0.4)
32. Once you have had back pain there is always a weakness3.23.23.70.0000.0 (−0.4 to 0.4)−0.5 (−0.9 to −0.1)†−0.5 (−0.8 to −0.0)†
33. There is a high chance that an episode of back pain will not resolve2.93.03.60.000−0.1 (−0.5 to 0.3)−0.7 (−1.0 to −0.2)†−0.6 (−0.8 to −0.3)†
34. Once you have a back problem, there is not a lot you can do about it2.31.82.20.0000.5 (0.2 to 0.9)†0.1 (−0.3 to 0.5)−0.4 (−0.7 to −0.2)†
• *1.0=‘False’, ‘3.0’=Unsure, ‘5.0’=True.

• †Significant difference (CI does not cross 0.0).

• LBP, low back pain.