Table 2.

Summary of the recent studies which have established new aetiological theory for growing pains (GP).

Date	First Author	Sample size	Research design	Findings	New theory
2004	Hashkes, PJ	GP group: n = 44 No GP control: n = 46	Case control Dolorimeter (pressure)	GP group had lower pain thresholds	GP may be a variant of a non-inflammatory pain syndrome
2005	Friedland, O	GP group: n = 39 No GP control: n =	Case control Ultrasound bone speed, tibia and radius	GP group had reduced tibial bone speed.	GP may represent a local overuse syndrome.
2005	Hashkes, PJ	GP group: n = 11 No GP control: n = 12	Case control Bone scintigraphy, tibia	GP group did not have altered vascular perfusion when compared with control group	GP are not associated with altered vascular perfusion as opposed to migraine