(b) any statement made by the person after suffering the harm about what he or she would have done is inadmissible except to the extent (if any) that the statement is against his or her interest.
18 The Defendants no doubt wish to support and rely upon the contemporaneous records set out in paragraphs [18] and [19] of the primary Judge's judgment. On the face of it, it would seem that s 5D(3) would prevent the Plaintiffs giving evidence to the contrary but how far they would be permitted to go in endeavoring to explain away what is recorded in those entries is difficult to determine. Whether the Plaintiffs would be entitled to rely on what appears in Dr Jungfer's report of 18 March 2008 (set out in paragraph [20] of the primary Judge's judgment) is also unclear. Frequently limiting orders are made in relation to histories given by the plaintiffs to treating doctors so that the opinions of the doctors may be affected by the extent of the factual evidence given by the plaintiffs in Court. Whether it is possible in the face of s 5D(3) to tender a report with a particular history as in Dr Jungfer's report is unclear.
19 The issue here, really, is whether the trial judge would be better assisted in determining the causation issue if he or she heard all of the Plaintiffs' evidence, including evidence associated with quantum issues.
20 When it is borne in mind that the Plaintiffs suffered from pre-existing psychiatric problems, that their other children had at least developmental or behavioral problems, that at least one and possibly two of the other pregnancies were unplanned, and that both Plaintiffs make a claim for damages for their own psychiatric and psychological damage, it cannot be said that the primary Judge was wrong in taking the view that (a) there were credibility issues involved in the causation issue, (b) the determination of that credibility issue would be assisted by the trial judge hearing all of the Plaintiffs' evidence, and (c) there was no clear dividing line between the evidence on credibility that would be tested in relation to matters of quantum and in relation to matters of causation.
21 Because Mr McDonnell suffered from major depression for some time before Bethany's birth, because of the problems experienced by most of the other children prior to Bethany's birth and because of the claims made by both Plaintiffs for psychiatric disorders as a result of the birth (Ms McDonnell now suffers from major depression) it seems to me there will be a considerable crossover of evidence in relation to the quantum issues and the causation issue. Mr McDonnell's pre-existing problems will have to be dealt with in some detail on his claim for psychiatric injury. Clearly, his pre-existing psychiatric condition will be a relevant circumstance that the Court will need to consider in deciding the causation issue.
22 Dr Jungfer also reports that Ms McDonnell had some evidence of low-grade depression at the time of the pregnancy with Bethany "within the context of the pregnancy being unwanted". Dr Jungfer also refers to the fact that there was some evidence suggesting Ms McDonnell had previous post-natal depression. Those matters will also be relevant to the Court in deciding the causation issue. Moreover, the same psychiatrists who give evidence in relation to the quantum case will be relevant to the evidence of the pre-existing psychiatric conditions of both the Plaintiffs.
23 Similarly, the ongoing problems with the children, which may well be relevant not only to the psychiatric claims of the Plaintiffs but also to the Plaintiffs' needs for care and upbringing costs for Bethany, are likely to be relevant to the causation issue also as further circumstances to be taken into account. In that regard, her Honour's observation that there is no bright line distinguishing the causation issue from the quantum issue seems entirely apt.
24 It does not seem to me that the primary Judge has proceeded on any erroneous basis in relation to the matter of credibility and the causation issues. Mr Anderson of counsel, who appeared for the Plaintiffs, accepted that the trial Judge would be assisted by hearing all of the evidence when the Judge came to assess overall the evidence of the Plaintiffs and any credibility issues relevant to them. He said, however, that that had to be offset by other considerations, pushed to the fore by the Civil Procedure Act, such as costs savings associated with a separate trial. They are matters of weight which I will deal with in a moment. A decision one way or another in that weighing up exercise does not point to an erroneous basis for the primary Judge's decision.
25 She did not take into account any irrelevant matter, she did not fail to take into account or give insufficient weight to a relevant matter, there was no error of legal principle as I have already determined, no material error of fact is identified, nor is the result so unreasonable or unjust as to suggest that an error must have been made: Micallef v ICI Australia Operations Pty Ltd [2001] NSWCA 274 at [45].
26 The Plaintiffs make a number of points about the benefits of a separate hearing on the causation and liability issues.
27 The Plaintiffs submit that the quantum issues will not be able to go to trial for some time because Bethany is only 2½ years old. There was no evidence before the primary Judge directed to the need for any delay in assessment of the quantum and an attempt to lead fresh evidence to that effect was abandoned at the outset of the appeal. On the state of the evidence before the primary Judge all that could be concluded is that because she is a young child it may take some time for her disabilities to stabilize. That only means that the case is a similar one to any involving a child born with defects associated with the birth or some congenital problem. It may be taken, however, that the Plaintiffs may not wish to have the quantum issues determined until there is some stabilization.
28 Bearing those matters in mind, the Plaintiffs say that a separate trial is appropriate because if they are successful they will have the opportunity to apply for an interim payment and it is more likely that the whole case will settle than if liability remained an issue. On the other side, there is the benefit of finality for the Plaintiffs in the event that they are unsuccessful. In that case they will also be saved the not inconsiderable expense of preparing the quantum case. All of those matters are not without some merit.
29 However, they are matters which the primary Judge was required to, and did, weigh up. Her Honour's judgment was a judgment involving the exercise of discretion and it is necessary, as I have said, for the Plaintiffs to show a House v The King type of error. In my opinion, the Plaintiffs have not established such an error with the result that the appeal must be dismissed.
30 The Orders I make are these: