Table 2.

The number of participants with LBP (n = 15) that reported the descriptors aching, stiffening, and tightness as “typical” and during standing.

Descriptor			Typical			Χ2*	P-value	Agreement: Disagreement¶
			Yes	No	Total
Aching	Standing	Yes	14	0	14	NA#	NA#	15:0
		No	0	1	1
		Total	14	1	15
Stiffening	Standing	Yes	5	6	11	2.29	0.13	8:7
		No	1	3	4
		Total	6	9	15
Tightness	Standing	Yes	4	4	8	0.80	0.37	10:5
		No	1	6	7
		Total	5	10	15
Aching, Stiffening, or Tightness**	Standing	Yes	15	0	15	NA#	NA#	15:0
		No	0	0	0
		Total	15	0	15

^*For each symptom descriptor, a McNemar’s chi-square test was calculated.

^¶Ratio of agreements (yes/yes and no/no responses) to disagreements (no/yes to yes/no responses).

^#Unable to calculate statistic because of lack of discordant pairs.

^**Numbers of participants that reported at least one of the 3 descriptors as “typical” and during standing.

LBP, low back pain; NA, not applicable.