ground A - Compensable psychiatric ailment
15 The Tribunal accepted the opinions of Dr Walden (a consultant psychiatrist) and Dr Roldan (a consultant psychologist) that Ms Sheikh had not had a psychiatric disorder or condition and that her inappropriate response to situational circumstances were a consequence of a personality style with maladaptive coping mechanisms. The Tribunal noted that an evaluation test suggested that Ms Sheikh was likely to exaggerate and over-report her clinical symptoms. It considered that Ms Sheikh's personality style pre-existed the back injury, as evidenced by the opinions of the psychiatrists, and referred in its reasons to there being evidence of such a personality style in Ms Sheikh's explanation as to why she believed her application for compassionate leave was appropriate. By reason of her personality style being pre-existent, the Tribunal found that Ms Sheikh's consultant and attending clinicians, as well as her employer, would experience difficulty in understanding the continuing symptomatology of her physical injury and subsequent treatment experiences in the face of the maladaptive coping mechanisms that had been "so much in evidence". The Tribunal considered that the personality style giving rise to the maladaptive coping mechanisms was a given constant and that such coping mechanisms are behaviourally manifested when a situational circumstance creates stress and conflict. The Tribunal accepted that the maladaptive coping mechanisms are triggered in response to stressor situations with the individual retaining control over the choice of the behavioural response.
16 The Tribunal noted that various clinicians, including Drs Bentivoglio, Chase and Maxwell, mentioned that Ms Sheikh had been depressed. The Tribunal further noted that Dr Baker, in his various reports, had diagnosed Ms Sheikh as having a depressive disorder. After a comprehensive discussion of the evidence, the Tribunal did not accept Dr Baker's diagnosis of depressive disorder and preferred the opinions of Drs Walden and Roldan to that of the other expert witnesses.
17 On appeal, counsel for Ms Sheikh submits that it was not open to the Tribunal to find that all her post-injury behaviour could be explained by the diagnosis of maladaptive personality style. It is said that this is because no diagnosis was made by any psychiatric specialist of a past or present personality disorder. Nor, he points out, was there any evidence of a maladaptive personality extending over a significant period of time prior to the physical injury suffered by Ms Sheikh in May 1997. The claim that this finding was not open to the Tribunal was also sought to be justified by a submission that there was contemporaneous past medical evidence from qualified medical specialists of the alternative diagnosis of depression or another psychiatric disorder, consequent upon her physical injuries, which was not equated by those specialists with normal mood variation. More precisely, it is said that the Tribunal found that the sole reason for the behaviour of Ms Sheikh was her maladaptive personality style with no contribution made by depression arising from her workplace injuries and related events and that such an extensive finding had no reasonable basis in the evidence.
18 The evidence of Dr Walden, whose diagnosis was accepted by the Tribunal, included a report of 30 January 2002 after an interview with Ms Sheikh of approximately one and a half hours. Dr Walden concluded that a diagnosis of adjustment disorder with anxiety and depressed mood was not appropriate because the inappropriate behaviour of Ms Sheikh outlined in Dr Walden's report was consistent with an underlying personality style rather than a psychiatric illness or condition. Dr Walden considered that Ms Sheikh's behaviour was a reflection of limited coping mechanisms rather than the development or onset of a sudden depressive disorder. She recorded that the appellant did not present as being depressed. Her conclusion on that occasion is summarised as follows:
"I do not consider she currently has a psychiatric disorder which limits her ability to attend work and perform her normal restricted duties. However her personality style is enduring and she is likely to continue to become angry and upset if she perceives that others are critical and questioning of her capabilities."
19 In her subsequent report of 5 February 2003, Dr Walden refers to a further interview with Ms Sheikh on 30 January 2003 of approximately one and a quarter hours. Dr Walden notes that a major depressive disorder diagnosis requires at least two weeks of symptoms of pervasively depressed mood and at least four symptoms in the areas of sleep disturbance, weight loss, suicidal ideation, poor concentration and attention, feelings of hopelessness and worthlessness and fatigue. Dr Walden did not consider that this was consistent with the history of Ms Sheikh. She considered that Ms Sheikh had been coping satisfactorily from a psychological point of view until she was confronted with the prospect of an increase in work hours, after which she referred to feelings of depression. Dr Walden observed that when such fluctuations of mood occurred in the context of the usual coping mechanisms of one's personality, a diagnosis of disorder is not generally assigned. She considered that it was Ms Sheikh's personality style and inadequate coping mechanisms that were the critical factors that led to her sudden overdosing. She confirmed her diagnosis that the mood disturbance of Ms Sheikh was indicative of mood fluctuations that resulted from her personality style and not from depressive illness.
20 One criticism levelled at Dr Walden's diagnosis that the behaviour of Ms Sheikh arose out of her personality style was that there was no pre-existing behaviour or indication before the injury of any such inadequate coping mechanism. It is said that, in the absence of any pre-injury manifestation of personality maladaptive coping style, it was not open to Dr Walden to make this diagnosis. As counsel for the Corporation points out, however, there is no evidence to support the proposition that it is essential to have a pre-injury manifestation of inappropriate behaviour before a diagnosis of maladaptive personality style can be made. He points out that there is evidence from Dr Walden, in cross-examination, on this point, to the effect that it was not necessary to have any manifestation of personality problems before making such a diagnosis. The following exchange took place in the course of cross-examination of Dr Walden in relation to the question of whether prior pre-injury indications of maladaptive behaviour were necessary:
" … [the absence of any pre-existing behaviour] does not indicate, does it, that she was having any inappropriate function related to her underlying personality during that period? ---- It doesn't give us any positive history of it, the absence of it doesn't necessarily mean it wasn't there.
… but there is a difference between saying, well, there could have been, I mean there might have been, as opposed to there was, isn't there? ---- Well, look, what I am saying to you is, for someone to …. the issue is that this lady has quite deliberately overdosed in a very manipulative fashion on two occasions as a way to getting people to back off, that is evidence of personality dysfunction. The fact is that she - we don't know and we have no evidence that she has behaved in quite such an extreme way before, doesn't mean that there is an absence of personality difficulties."
21 This evidence provides support for the conclusion that, in the opinion of Dr Walden, it is not necessary to demonstrate previous manifestations or outbreaks of personality disorder problems in order to make a diagnosis that the condition under consideration is that of maladaptive personality style rather than psychiatric disorder.
22 In this case, there was a great deal of material before the Tribunal, much of which was not seen or used by the individual witnesses. It is not appropriate to simply isolate particular parts of the evidence taken out of context of the overall information. The Tribunal had a wider range of information upon which to draw in reaching its conclusion.
23 In the reasons of the Tribunal, there is a statement that there was evidence of a manifestation of the pre-existing personality style of Ms Sheikh having regard to her explanation as to why she believed her application for compassionate leave should be granted. This incident related to false reasons given by Ms Sheikh in relation to obtaining compassionate leave. Ms Sheikh said that she needed a day to look after her sick mother when she was not, in fact, looking after her mother.
24 In relation to this evidence, I agree with counsel for Ms Sheikh that this does not of itself amount to a manifestation of maladaptive personality style but I am not persuaded that the reference to this behaviour had any material effect on the conclusion of the Tribunal in the light of the preferred expert evidence.
25 I am not persuaded that the Tribunal's reasoned preference for the evidence of Dr Walden ought to be discounted or that it was not open to the Tribunal to accept the expert opinion expressed in her reports and in oral testimony.
26 For these reasons, I am not satisfied that there has been any error of law or principle on the part of the Tribunal in preferring the evidence of Dr Walden and accepting her analysis of the behaviour and personality of Ms Sheikh. This appeal is strictly limited to questions of law, and the preference of the Tribunal for the diagnosis of Dr Walden after careful analysis of contrary material and expressed reasons, which on their face are open, does not amount to such an error. Furthermore, there was evidence on which Dr Walden could reach the conclusion which she did and I am persuaded that it was open to the Tribunal to reach the conclusion that it was not necessary to have pre-existing manifestations of the maladaptive personality style in order to reject the claim of compensable psychological illness. Ms Sheikh therefore fails on this first issue.