Table 1. The median [interquartile range], and results of Mann Whitney U for baseline measures.

	WAD (n = 28)	Controls (n = 25)	U, z
NDI (%)	40 [12, 58]
PSEQ	30 [4, 56]
Age	43 [35, 52]	45 [35, 54]	339.5, -0.187
BMI	26.7 [21.7, 30.5]	23.8 [22.2, 26.0]	417.5, 1.496
SF12MCS	44.3 [35.5, 51.3]	57.8 [55.0, 57.9]	127.0, -3.857**
SF12PCS	37.5 [33.3, 44.2]	56.6 [55.5, 57.0]	2.0, -6.148**

BMI (body mass index), NDI (neck disability index), PSEQ (pain self-efficacy questionnaire), SF12MCS (the medical outcomes short form mental component score), SF12PCS (the medical outcomes short form physical component score), WAD (whiplash associated disorder)

** p<0.000