Factual Background
4 On 19 March 2003, the Plaintiff was working for his father on the family property, which lay between Bendemeer and Uralla. He had been handfeeding sheep from the back of an open-tray Bedford truck. The truck was moving across the paddock and the Plaintiff was sitting at the rear of the tray on top of some hay bails. The truck hit a rut in the ground and the Plaintiff was thrown in the air. He landed heavily on his buttocks and immediately felt a knife-like pain in the centre of his back, giving rise to a rupture of the L5/S1 disc.
5 The Plaintiff exacerbated this injury on 21 January 2004 while doing road repair work on the family property. He was shovelling dirt when he slipped and fell on his buttocks. In the period after January 2004, the Plaintiff was diagnosed with a psychiatric injury.
6 The Plaintiff claimed that his psychiatric injury was caused by the motor accident of 19 March 2003 and that his degree of permanent impairment as a result of that injury was greater than 10%. He claimed damages for non-economic loss, which requires that an injured person's degree of permanent impairment be greater than 10%: s.131 MAC Act.
7 QBE denied liability for the claim. On 11 July 2007, the Plaintiff applied to the MAA for assessment of the disagreement between the Plaintiff and QBE regarding his degree of permanent impairment as a result of his psychiatric injury. The report of Dr Anthony Dinnen, psychiatrist, was submitted in support of the Plaintiff's application. Dr Dinnen assessed the Plaintiff's degree of permanent impairment at 21%.
8 QBE agreed with the Plaintiff's characterisation of the disagreement as "permanent impairment and stabilisation". However, QBE disagreed that the Plaintiff suffered a whole-person impairment of greater than 10% and consented to the referral of that disagreement: s.60(2) MAC Act. QBE submitted a report of Dr Robert Lewin, psychiatrist. Dr Lewin diagnosed a psychiatric injury, adjustment disorder with depressed mood, noting the Plaintiff's symptoms as being characteristic of a reactive depression within the context of a chronic pain syndrome. Dr Lewin assessed the Plaintiff's degree of permanent impairment at that time at 7%.
9 The Medical Assessor to whom the disagreement was referred was Assessor Brian Parsonage, psychiatrist. Medical Assessor Parsonage furnished two Certificates of Determination of Assessment dated 27 August 2007. The certificate with respect to whether an injury had stabilised stated (affidavit, MG Dennis, 2 June 2008, page 61):
"The following injuries caused by the motor accident have stabilised
NIL diagnose psychiatric disorder related to the motor accident ."
10 The certificate concerning the degree of permanent impairment of the injured person as a result of the injury caused by the motor accident stated (page 62):
"The following injuries caused by the motor accident give rise to whole person impairment which, in total, IS NOT GREATER THAN 10% :
NIL diagnosed psychiatric disorder related to the motor accident."
11 The Medical Assessor provided a statement of reasons with respect to these certificates (pages 50-59).
12 The Medical Assessor recounted the Plaintiff's history and account of the motor accident, his findings on clinical examination and review of documentation before moving to his conclusions. With respect to the Plaintiff's psychiatric disorder, Medical Assessor Parsonage concluded (page 57):
"While I accept that Mr Ackling had an on-going back problem arising from the subject motor vehicle accident, he did not develop a psychiatric disorder secondary to his back pain, until after the second injury in January, 2004. Therefore, while the subject motor vehicle accident helped to predispose Mr Ackling to developing a psychiatric disorder, it was the exacerbation of his back pain in January, 2004 and the failure of subsequent treatment that caused Mr Ackling's Major Depressive Disorder.
If Mr Ackling had not re-injured himself in January 2004, there is no evidence that he would have developed a psychiatric disorder secondary to his residual and improving back pain and functioning which was apparent in January, 2004 before his second injury."
13 Medical Assessor Parsonage determined that no diagnosed psychiatric disorder related to the accident on 19 March 2003, although he concluded that the Plaintiff had developed major depressive disorder after he re-injured his back in January 2004 (page 58).
14 On 3 October 2007, the Plaintiff's solicitor completed an application for review of a medical assessment under s.63(1) MAC Act. The Plaintiff contended that Medical Assessor Parsonage had erred in his determination concerning causation of the Plaintiff's psychiatric disorder (page 69).
15 On 15 October 2007, the solicitor for QBE filed a reply to the application for a review of a medical assessment, in which it was conceded that the approach of Medical Assessor Parsonage to the issue of causation was incorrect (page 137).
16 On 30 January 2008, a Review Panel comprising Assessors Paul Friend, Anthony Samuels and Patricia Jungfer (all psychiatrists) undertook a review of the assessment of Medical Assessor Parsonage for the purpose of s.63(3) MAC Act. The review was undertaken on the papers.
17 On 30 January 2008, the Review Panel issued certificates of determination in which the certificates of assessment of Medical Assessor Parsonage dated 27 August 2007 were confirmed. The Review Panel concluded that no diagnosable psychiatric disorder related to the motor accident (pages 146-149). The statement of reasons of the Review Panel included the following (pages 143-144):
"The panel agreed that the psychiatric/psychological condition arising from the injuries sustained in the accident of 19/3/2003 was stabilised.
The panel could not find any evidence that there was a psychiatric/psychological condition arising from the injuries sustained in the accident of 19/3/2003. Mr Ackling had not sought psychiatric/psychological treatment. The assessments by three separate psychiatrists during 2007 described a very similar account of the two accidents and a similar description of Mr Ackling's symptoms and injuries. None of the three psychiatric reports mentioned psychiatric/psychological symptoms that would reach or be likely to reach criterion for a psychiatric diagnosis. All agreed that he had developed depressive symptoms and had a depressive illness following the second accident on 21/1/2004. Therefore the panel agrees with the findings of Assessor Parsonage that there was no assessable psychiatric/psychological condition arising from the injuries sustained in the motor accident of 19/3/2003. As there was no assessable psychiatric/psychological condition arising from the accident of 19/3/2003 there can be no assessment of permanent impairment."
18 The Review Panel determined that the 19 March 2003 accident was not a cause, or a significant contributing factor, to the Plaintiff's psychiatric disorder (page 144).
19 The Plaintiff commenced the present proceedings by Summons filed 17 April 2008.