Damages for non-economic loss
19 In a statutorily modified common law action for damages such as this, the court is constrained by statute in its ability to award damages for non-economic loss, that is, for pain and suffering, loss of the amenities of life, loss of expectation of life and other non-monetary losses. Having regard to the former s.151G of the Workers Compensation Act 1987 applying to claims for damages commenced before 27 November 2001, the court may not award more under that heading than the amount prescribed as applicable to "a most extreme case" (here, $240,350). Where the particular case does not represent "a most extreme case", it is the task of the court to award a proportion of the maximum determined according to the severity of the non-economic loss.
20 An obvious example of injury likely to be regarded as "a most extreme case" is quadriplegia. In some instances, paraplegia may be "a most extreme case": Dell v Dalton (1991) 23 NSWLR 528. A case of serious brain damage or gross disfigurement may also represent "a most extreme case": Owners of Strata Plan 156 v Gray [2004] NSWCA 304. Less horrific injuries must be placed at an appropriate point on the scale below "a most extreme case". As Handley JA observed (with the concurrence of Kirby P and Priestley JA) in Dell v Dalton, determining that appropriate point "will involve questions of fact and degree, and matters of opinion, impression, speculation, and estimation, calling for the exercise of commonsense and judgment". Review on appeal of such an assessment by a judge sitting without a jury is permissible only if, and to the extent that, the judge acted on a wrong principle of law, misapprehended the facts or made "a wholly erroneous estimate of the damages suffered": see cases referred to by McColl JA in Ghunaim v Bart (above) at [100].
21 The primary judge assessed non-economic loss at 27%. He referred at some length to the evidence of the appellant's medical history and prognosis. The day after the injury, lumbar function was found by Dr Mok to be 45 degrees with extension, lateral flexion and rotation to both sides normal, although all ranges of movement were associated with pain. There was some diminution in flexion and extension at the hips, plantar flexion and dorsiflexion of both feet were normal power and reflexes of lower limbs were normal. The plaintiff said he could "hardly walk" and had two weeks off work before going back "to try and do something". By 9 March 2000, Dr Mok found the appellant to be "80% improved". However, back pain persisted and made it difficult for him to cope with even light duties at work. The primary judge reviewed in some detail assessments by Dr Mok, Dr Sun and a neurosurgeon, Dr McDowell who, in December 2000, found dehydration and bulging of the L5/1 disc with what appeared to be a midline annular tear. Dr McDowell formed the view that the pain was discogenic but that neurosurgery was not indicated. Dr Sun said in a report of November 2000:
"Provided suitable duties are available he should be able to manage 30 hours a week of work."
22 The appellant's return to work with the respondent was unsuccessful, as were his attempts to find other work, apart, it seems, from a trial on the shop floor at Hardwarehouse in the plumbing section which he enjoyed but found somewhat difficult because of sustained standing. He was mobile, although unable to walk long distances and could only lift light objects. As a result of his back pain and his inability to find suitable work, the appellant became depressed. He was treated by a psychologist. Attempts were made to find him a place in a private psychiatric hospital as he was considered a high suicide risk. The hospital could not accommodate him and he continued regular sessions with the psychologist. There were sixteen sessions in all.
23 The medical evidence was reviewed by the primary judge in some detail. It showed that the appellant had suffered previous back injuries in the course of working as a plumber. The first occasion was in 1977 (or, according to at least one of the several medical histories in evidence, 1975) when the appellant lifted some gas cylinders. There was another incident of back injury in or about January 1986 when the appellant lifted a heavy electric eel. One medical report (that of Dr Tinning, an orthopaedic surgeon) refers, in addition, to an incident in October 1993 when the appellant experienced back pain after digging and an occasion in May 1994 when his back became very sore after a period of bending down. All the reports are consistent in diagnosing these earlier injuries as involving ligament strain.
24 Another consistent message from the medical reports is that there was a degree of pre-existing degenerative disease; also that the appellant is no longer fit for plumbing work involving lifting or regular stooping or bending, but is by no means incapable of doing other work of a less physically demanding kind. Dr Edwards, who provided an expert report dated 14 August 2003 for the purposes of the proceedings at first instance, expressed the opinion that the appellant had sustained an 8% impairment of his back, compared with a most extreme case, and that 70% of this impairment was a result of degenerative changes pre-dating the incident on 23 February 2000, while 30% may be attributable to that incident. Dr Matheson, in a report also dated 14 August 2003, expressed the opinion that the appellant had a 15% permanent impairment of the back and that the incident of 23 February 2000 had produced a 5% permanent impairment of the back.
25 It was submitted on behalf of the appellant at the trial that non-economic loss might appropriately be assessed as 30% of "a most extreme case". It was submitted on appeal that the earlier submission does not preclude the adoption of some greater percentage by this court. Reference was made to Dare v Pulham (1982) 148 CLR 158 and Webster v State of New South Wales (unreported, NSWCA, 23 July 1999). The proposition advanced on behalf of the appellant may be accepted in the abstract. But the fact remains that, in order to establish an entitlement to have this court place his non-economic loss at some higher point on the scale, the appellant must show, by reference to the evidence, that 27% represents "a wholly erroneous estimate of the damage suffered".
26 I am not satisfied that the appellant has discharged that onus. As far as the physical injury is concerned, it is clear that the appellant suffers some incapacity because he cannot safely lift heavy objects or function in a way that involves regular stooping or bending. He also has difficulty in standing for long periods. But he is mobile and has no impairment in walking or driving, so that, subject to the impact of the particular incapacity involving lifting, regular stooping and bending and prolonged standing, he is physically able to live a normal life. The non-physical aspect, in the form of depression, was treated and improved. The process of adjustment to reduced physical capacity and unsuitability for plumbing work in the future will be ongoing.
27 The primary judge did not, in this area, act on any wrong principle of law or any misapprehension of the facts; nor could the estimate he made be said to be wholly erroneous.