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Suicide in children and adolescents in England and Wales 1970–1998

Published online by Cambridge University Press:  02 January 2018

G. M. G. McClure*
Affiliation:
Brent, Kensington, Chelsea & Westminster Mental Health NHS Trust and Imperial College School of Medicine, Child and Adolescent Services, Chelsea and Westminster Hospital, 369 Fulham Road, London SW10 9NH
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Abstract

Background

Suicide rates for England and Wales have been decreasing recently, but rates for young adult males remain high.

Aims

To review changes in suicide rates for children and adolescents in England and Wales between 1970 and 1998.

Method

Rates for suicide, ‘accidental’ death by causes similar to suicide and ‘undetermined’ death for 10–14- and 15–19-year-olds are calculated between 1970 and 1998 using suicide data and estimated mid-year populations obtained from the Office for National Statistics.

Results

There has been a substantial increase in suicide rate between the 1970s and the 1990s for males aged 15–19 years. This remains true even when ‘undetermined’ and ‘accidental’ death rates for causes similar to suicide are examined. The increase was associated with an increase in self-poisoning with vehicle exhaust gas in the 1980s and an increase in hanging which has continued into the 1990s. Although there was a slight decrease in the official suicide rate for females aged 15–19 years, ‘undetermined’ deaths increased. There is no indication of a major change in suicide rate in 10–14-year-olds.

Conclusions

The substantial increase in suicide rate in 15–19-year-old males may indicate increased psychosocial stress, particularly affecting this group.

Type
Papers
Copyright
Copyright © 2001 The Royal College of Psychiatrists 

This paper reviews the changes which have occurred in officially recorded suicide rates in England and Wales for young people between 10 and 19 years of age between 1970 and 1998. Changes in suicide in the whole population of England and Wales between 1960-1997 have been discussed in an earlier paper (Reference McClureMcClure, 2000a ). It is necessary to examine the younger age groups in more detail, because their characteristics are different and the pattern of suicide behaviour is dissimilar to that of the adult population (McClure, Reference McClure1984b , Reference McClure1994). In the 1980s and early 1990s there was concern about a substantial increase in rates of suicide in young males (McClure, Reference McClure1984b , Reference McClure1994), although there were signs of a reversal in this pattern in the mid-1990s (Reference Kelly and BuntingKelly & Bunting, 1998). Despite this, rates of suicide in older male adolescents and young adults remain alarmingly high (Reference Kelly and BuntingKelly & Bunting, 1998).

Trends in suicide in Britain have been influenced by changes in the lethality and ease of availability of commonly used methods of suicide (Reference Gunnell, Wehner and FrankelGunnell et al, 1999a ; Reference McClureMcClure, 2000a ). The increase in deaths by overdose in teenagers during the 1960s and 1970s and subsequent decrease during the 1980s has been reported previously (Reference McClureMcClure, 1986). Similar patterns were evident, although at a much lower level, in younger adolescents, aged 10-14 years, up until the mid-1980s (Reference McClureMcClure, 1988). Later, until the early 1990s a high proportion of young male adults committed suicide using carbon monoxide in car exhaust fumes (Reference Kelly and BuntingKelly & Bunting, 1998), but there is evidence that this method has started to become less frequent as the number of cars fitted with catalytic converters has increased (Reference McClureMcClure, 2000a ). There has been a recent increase in hanging in young people of both genders in England and Wales (Reference Kelly and BuntingKelly & Bunting, 1998; Reference McClureMcClure, 2000a ).

In this paper it has been considered necessary to examine ‘undetermined’ and ‘accidental’ deaths by methods comparable to suicide. This is because suicides may be misclassified where the coroner considers that there is insufficient evidence that the injury was self-inflicted and the individual intended to die (Reference McClureMcClure, 1984a ). Actual suicide rates in young people may be at much higher levels than the official suicide rate (Reference McClureMcClure, 1994; Reference Madge and HarveyMadge & Harvey, 1999).

METHOD

Annual suicide statistics are available from the Office for National Statistics (1991-1998), the Office of Population Censuses and Surveys (1974-1990) and the Registrar General's Office (1970-1973). By using census-derived mid-year population estimates for five-year age bands, the rates for 10-14-year-olds and 15-19-year-olds are calculated. Changes in rates of suicide by different methods are also examined. A similar method is used to obtain rates for undetermined death and accidental death by categories comparable to suicide.

RESULTS

Suicide, undetermined and accidental death in 15-19-year-olds

Figure 1 demonstrates the rates of suicide for males and females aged 15-19 years in England and Wales between 1970 and 1998. The suicide rate for males aged 15-19 years increased by 72% between 1970 and 1990, and remained at a relatively high rate throughout the 1990s (see Table 1). The suicide rate for females aged 15-19 years decreased slightly between the 1970s and the 1980s, with low rates persisting into the 1990s.

Fig. 1 Suicide and undetermined death in the 15-19-year-old age group in England and Wales.

Table 1 Suicide, undetermined death and accidental death by methods similar to suicide in 15-19-year-olds in England and Wales

1970 1980 1990 1998
n (Rate1) n (Rate1) n (Rate1) n (Rate1)
Suicide
Male 55 (33) 84 (41) 100 (57) 86 (52)
Female 22 (14) 39 (20) 23 (13) 21 (13)
Undetermined
Male 21 (12) 45 (22) 74 (42) 81 (49)
Female 8 (5) 22 (11) 26 (16) 31 (20)
Accidental
Male 87 (51) 88 (43) 82 (47) 56 (34)
Female 21 (13) 21 (11) 16 (10) 17 (10)
Suicide and undetermined
Male 76 (45) 129 (63) 174 (99) 167 (101)
Female 30 (19) 61 (31) 49 (29) 52 (33)
Suicide and undetermined and accidental
Male 163 (96) 217 (106) 256 (146) 223 (135)
Female 51 (32) 82 (42) 65 (39) 69 (43)

The rate of undetermined deaths for 15-19-year-old males increased from 12 per million in 1970 to 49 per million in 1998. For females, there was a similar trend, with undetermined deaths increasing from five per million in 1970 to 20 per million in 1998. There has thus been an approximately four-fold increase in undetermined death rate for both males and females aged 15-19 years between 1970 and 1998.

The accidental death rate for methods similar to suicide in males decreased from 51 per million in 1970 to 34 per million in 1998. For females the accidental death rate decreased from 13 per million in 1970 to 10 per million in 1998. The substantial rise in undetermined deaths is therefore partially, but not entirely, offset by this decrease in accidental deaths.

Suicide by different methods in 15-19-year-olds

Suicide by poisoning by solid or liquid substances (E950), including overdoses, increased up to 1980 and then decreased between 1980 and 1998, for both genders, as shown in Fig. 2. Whereas there were 47 suicides by this method in 1980 (25 males, 22 females) there were only 21 in 1998 (11 males, 10 females). Suicide by poisoning with gases other than domestic gas (E952) increased between 1970 and 1990, particularly in males. The majority of these deaths were by poisoning with vehicle exhaust gas (E952.0), as shown in Fig. 3. In 1970 there was only one male death by this method, increasing to 23 males and two females in 1990. This has decreased to three males and one female in 1998.

Fig. 2 Suicide by poisoning by solid or liquid substances, in the 15-19-year-old age group in England and Wales.

Fig. 3 Suicide by poisoning with motor vehicle exhaust gas (ICD E952.0) in the 15-19-year-old age group in England and Wales.

There has been a substantial increase in suicide by hanging, strangulation and suffocation (E953) in males, as shown in Fig. 4. Suicide by this method increased from 14 males and three females in 1970 to 54 males and 3 females in 1998. Sixty-three per cent of all male suicides in this age group were by hanging in 1998.

Fig. 4 Suicide by hanging, strangulation and suffocation in the 15-19-year-old age group in England and Wales.

There has been little change in suicide by other methods such as drowning (E954), with only two male deaths in 1998, or suicide by cutting and piercing instruments (E956), with only one male death in 1998. Suicide by firearms (E955) is now also at very low levels, with only two male deaths by this method in 1998. There were four male and two female deaths by jumping from a high place (E957) in 1998. Suicides by other and unspecified means (E950) totalled 10 males and five females in 1998. The majority of these deaths are by jumping or lying before moving vehicles.

Suicide, undetermined and accidental death in 10-14-year-olds

There have been no recorded suicides in children under 10 years between 1970 and 1998. As numbers are very small, suicides for children aged 10-14 years have been aggregated into decades (see Table 2). There was no change in rate for males aged 10-14 years between the 1970s and the 1990s and the rate for females decreased very slightly. The actual numbers of recorded suicides for both genders remains extremely low.

Table 2 Suicide, undetermined death and accidental death by methods similar to suicide in 10-14-year-olds in England and Wales

1970-79 1980-89 1990-98
n (Rate1) n (Rate1) n (Rate1)
Suicide
Male 29 (1.4) 25 (1.5) 22 (1.4)
Female 24 (1.2) 17 (1.0) 14 (0.9)
Undetermined
Male 75 (3.8) 10 1 (5.7) 91 (5.6)
Female 29 (1.5) 35 (2.1) 47 (3.0)
Accidental
Male 552 (27.7) 40 1 (23.2) 182 (11.1)
Female 93 (4.9) 81 (4.8) 52 (3.4)
Suicide and undetermined
Male 104 (5.2) 126 (7.2) 113 (7.0)
Female 54 (2.7) 52 (3.1) 61 (3.9)
Suicide and undetermined and accidental
Male 656 (32.9) 527 (30.4) 295 (18.1)
Female 147 (7.6) 133 (7.9) 113 (7.3)

The numbers for undetermined deaths are small for the 10-14 year age band and have, therefore, been aggregated into decades (see Table 2). For both genders, there has been an increase in undetermined death since the 1970s, although actual numbers remain low.

There were substantial changes in accidental deaths by causes similar to suicide for males, with a decrease from 27.7 per million in the 1970s to 11.1 per million in the 1990s. For females, the rate decreased from 4.9 per million in the 1970s to 3.4 in the 1990s. This decrease in accidental deaths was principally due to a decrease in drowning.

The summation of suicide, undetermined and accidental rates shows a decrease for males between 1970-1998 and little change for females.

DISCUSSION

Changes in suicide rate in children and adolescents

Among children and adolescents, the only group to have shown an increase in official suicide rate since 1970 has been males aged 15-19 years. This increase is still evident when one examines the changes in undetermined and accidental rates during 1970-1998 and indeed the actual increase in suicide may be greater than the official suicide statistics indicate. There has therefore been a clear increase in suicide in 15-19-year-old males in England and Wales between 1970 and 1998 and the decline in the mid-1990s reported by Kelly & Bunting (Reference Kelly and Bunting1998) appears to have been temporary.

For females aged 15-19 years, the official suicide statistics have shown a small decrease between the 1970s and the 1990s. Examination of the undetermined rate for females aged 15-19 years indicates an increase between 1970 and 1998. The increase in undetermined rate between the 1970s and the 1990s may offset the observed decrease in suicide rate. This is also true of the summated rates for undetermined and accidental deaths by methods similar to suicide. It is therefore possible that there was a small increase in suicide in females aged 15-19 years between the 1970s and the 1990s, although at a much lower level than in males.

There has been no change in official suicide rate for males aged 10-14 years between the 1970s and the 1990s, with a slight decrease in suicide rate for females of this age during the same period. For males and females aged 10-14 years, the increase in undetermined deaths may indicate small increases in misclassified suicide which are not evident in the recorded suicide statistics. The decline in accidents by methods similar to suicide for males and females aged 10-14 years, however, acts counter to the increase in undetermined death. It is likely, therefore, that there has been little change in the actual rate of suicide in 10-14-year-olds between the 1970s and the 1990s.

Changes in method of suicide

Since the 1970s we have observed substantial changes using different methods of suicide. Suicide by self-poisoning with solids and liquids (overdosing) peaked in the 1970s and has subsequently decreased for both males and females aged 10-19 years. For males in the 15-19-years group, the observed increase in suicide during the 1980s was due to an increase in hanging, strangulation and suffocation, and poisoning with motor vehicle gas. Since poisoning with motor vehicle exhaust gas decreased in the mid-1990s, there was a temporary decrease in the male suicide rate, followed by a further increase associated with higher numbers of hangings, which has persisted up to 1998. Changes in self-poisoning with motor vehicle exhaust gas and hanging were less evident in females aged 15-19 years and in males and females aged 10-14 years. These three phases can be described as epidemics of suicide, first by overdosing, then by poisoning with vehicle exhaust gas and currently by hanging, the latter two principally affecting older male adolescents.

Reasons for the increase in suicide in males aged 15-19 years

It should be noted that the high suicide rate in older male adolescents blends into the general phenomenon of higher suicide rates in young male adults (Reference McClureMcClure, 2000a ). As male adolescents move into adulthood their risk of suicide increases further (Reference Kelly and BuntingKelly & Bunting, 1998). Consideration of causal mechanisms is speculative, although it is informed by the results presented and may lead to future research which will test hypothetical causal mechanisms.

Suicide is the consequence of a highly complex interaction of factors affecting the young person in their ecological environment (McClure, Reference McClure, Reder, McClure and Jolly2000b ,Reference McClure, Reder, McClure and Jolly c ). Consideration must be given to factors which may make older male teenagers more vulnerable than female teenagers and younger males. The 10-14-year-old group are presumably shielded by adults from exposure to factors which may affect older teenagers. They may also be less likely to have the cognitive and practical ability to plan and carry out a suicidal act. Although older female teenagers (aged 15-19 years) are subject to social pressures, as is evident from high rates of depression and eating disorder, they may be subject to different pressures compared with older male teenagers. Similarly, their response to these pressures may differ and there may be different coping strategies adopted by females. Female teenagers who deliberately harm themselves are less likely to use highly lethal methods. We must consider factors which may be associated with suicidal behaviour which have worsened in recent years, particularly for older male teenagers. Additionally, psychological autopsy studies using coroners' records to trace contacts of the deceased person may shed light on the reasons for committing suicide (Reference Appleby, Cooper and AmosAppleby et al, 1999). It is important to examine not only the records of individuals given a verdict of suicide but also undetermined or accidental deaths by causes similar to suicide.

Factors associated with suicide in the young

Psychiatric disorder

Psychiatric disorder in the young is associated with increased risk of suicide, with comorbid disorder indicating especially high risk (Reference Shaffer, Gould and FisherShaffer et al, 1996). Suicidality has a strong and independent association with symptoms of depression (Reference FombonneFombonne, 1998). Although rates of psychiatric disorders have increased during the past 20 years, change in the rate of depression does not account for the recent increase in young male suicide (Reference FombonneFombonne, 1998). In a psychological autopsy study of young suicides Appleby et al (Reference Appleby, Cooper and Amos1999) found that major mental illness and personality disorder were common. In a meta-analysis by Harris & Barraclough (Reference Harris and Barraclough1998) an increased risk of suicide in child and adolescent psychiatric patients was found. Shaffer et al (Reference Shaffer, Gould and Fisher1996) demonstrated that past suicidal behaviour was a strong risk factor for subsequent suicide. Multiple acts of deliberate selfharm increase the risk of suicide (Reference Hawton, Arensman and TownsendHawton et al, 1998).

Substance misuse

Suicidality has a strong and independent association with substance misuse, particularly with alcohol, which is the most frequently misused substance (Reference FombonneFombonne, 1998). Substance misuse predates suicidal behaviours in most individuals, suggesting that substance misuse leads to subsequent suicidality. Furthermore, Fombonne (Reference Fombonne1998), suggests that alcohol misuse is the mechanism involved in the recent increase in male suicide. Prevalence rates of alcohol use increase throughout adolescence, with heavy drinking being a problem particularly for males. It should be noted that the increase in suicide rates in young men up to the 1990s occurred during a period of greater use of alcohol and drugs among young people. In a psychological autopsy study, Appleby et al (Reference Appleby, Cooper and Amos1999) confirmed that young people committing suicide were more likely to have misused alcohol or drugs. Alcohol also makes a contribution to the suicidal acts of some individuals, excessive blood alcohol levels being found at post-mortem in over one-fifth of cases (Reference Hawton, Houston and ShepperdHawton et al, 1999). Substance misuse is one of the strongest predictors of suicide following non-fatal self-harm in young people (Reference Hawton, Houston and ShepperdHawton et al, 1999).

Disrupted relationships

Shaffer et al (Reference Shaffer, Gould and Fisher1996) demonstrated a higher incidence of disrupted family background. The recent increase in family breakup, often with the loss of the father to the family, may have affected boys to a greater extent than girls. In Appleby et al's (Reference Appleby, Cooper and Amos1999) psychological autopsy study of young people, those committing suicide were more likely to have disturbed relationships and recent adverse life events. Abuse, which is related to family dysfunction, has been increasingly reported for both genders, but it may have affected young males more in relation to completed suicide. Similarly, reports of increasing bullying may have affected young males more than females. Older teenage boys are more likely to be out of their parents' control, particularly in single parent families, and it is possible that this might lead them into problems which would produce a suicidal reaction. In Fombonne's (Reference Fombonne1998) sample of referred male adolescents, however, a history of family breakdown was not specifically associated with suicidal behaviour.

Social exclusion

Appleby et al (Reference Appleby, Cooper and Amos1999) found increased rates of unemployment in young suicides. It should be noted, however, that there has been an improvement in the economy and unemployment statistics since the early 1990s (Office for National Statistics, 1999), although the suicide rate for male adolescents remains high. Gunnell et al (Reference Gunnell, Lopatatzidis and Dorling1999b ) demonstrated significant associations between unemployment and suicide among younger men and women. Hawton et al (Reference Hawton, Arensman and Townsend1998, Reference Hawton, Houston and Shepperd1999) demonstrated an association of suicide with unemployment and lower social class in the population of very young suicides. Social problems, homelessness, arrest and involvement in the judicial process may be further stresses for young males.

Male gender role

The gender difference in rates of suicide is remarkable (Reference Gunnell, Wehner and FrankelGunnell et al, 1999a ). The changing role of men and women in modern society may affect their propensity to commit suicide. Although some stresses are common to both genders the change in the role of young women may have enhanced their self-esteem and thus given them relative protection in relation to suicide. Young women may also have better coping strategies such as the use of supportive social networks. Conversely, new roles and expectations of young men in society may lead to loss of self-esteem if they are unable to live up to expectations. They may then be vulnerable to suicide if they lack appropriate supportive social networks or are unable to communicate their concerns.

Method availability

During the 1980s and early 1990s increased suicidal risk may in part have been due to the availability of a highly lethal agent — vehicle exhaust gas — which was favoured by young males as a method of suicide. Since the mid-1990s, however, the use of this method has declined, in part due to the introduction of catalytic converters (Reference McClureMcClure, 2000a ). The fact that suicide in males has remained high, due to an increase in hanging, indicates that the increase was not entirely due to availability of a new method, but was probably also related to increased psychosocial stress. Reasons for the increase being principally for males in the 15-19-years age band among the younger population need to be considered. During the 1980s and early 1990s other groups may have been protected by having less access to, and familiarity with, motor vehicles. Similarly, hanging may be more impracticable for younger age groups and less acceptable to older teenage females. Hawton et al (Reference Hawton, Houston and Shepperd1999) showed that the majority of lethal overdoses were with a small number of substances, in particular co-proxamol (paracetamol and dextropro-poxyphene).

Prevention

When considering prevention, the individual should be seen in an ecological interactive relationship with the environment, where the suicidal act may be a response to internal and external stresses (Reference McClure, Reder, McClure and JollyMcClure, 2000b ). All of the above factors should be considered when planning a preventive strategy.

Restricting the availability of dangerous substances (such as co-proxamol) should be considered. Additionally, reduction of drug and alcohol misuse by young people may help to prevent suicide. Health education and the provision of suitable services should be targeted at young people with other risk factors, such as social exclusion or unemployment, or those who carry out non-fatal self-harm. Suicide among the young may be precipitated by interpersonal problems, indicating that improvements in interpersonal and life skills may be beneficial (Reference Hawton, Houston and ShepperdHawton et al, 1999). Furthermore, young people should have the knowledge of where to obtain help, in times of crisis.

A substantial proportion of young people who commit suicide who have engaged in previous self-harm have neither been referred to a general hospital nor seen their general practitioner (Reference Hawton, Houston and ShepperdHawton et al, 1999). Hawton suggests that the significance of the self-harm, as well as the expression of suicidal ideation, needs emphasising in public education so that more individuals at risk can receive attention from clinical and other support agencies. It is important that reporting and portrayal of suicide should be modified so that it is not glamorised and does not encourage young people to commit suicide.

Although evidence for the efficacy of treatment following deliberate self-harm is currently not strong (Reference Hawton, Arensman and TownsendHawton et al, 1998), the fact that parasuicide is an important predictor of possible future suicide means that efforts should be made to identify and treat those at highest risk. Half of Hawton et al's (Reference Hawton, Houston and Shepperd1999) sample had seen a general practitioner within 3 months of death and one-third within a month. Nearly one-third of the sample had been in psychiatric care in the year before death. Prevention of suicide in the young therefore involves improvements in general practice and adolescent psychiatric services, in addition to general public health measures.

Clinical Implications and Limitations

CLINICAL IMPLICATIONS

  • Males aged 15-19 years are a high risk group for suicide among the young.

  • Increasing deaths by hanging now make it the most common cause of suicide in the young.

  • The four-fold increase in undetermined deaths in males and females aged 15-19 years since the 1970s may indicate concealed suicides.

LIMITATIONS

  • There is possible mis-classification between suicide, undetermined and accidental death categories.

  • The study design does not explain the mechanisms behind changes in suicide rate.

  • Causal explanations are multifactorial and complex due to the incompletely understood psychosocial ecology of young people.

ACKNOWLEDGEMENT

I thank the Office for National Statistics for their support.

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Figure 0

Fig. 1 Suicide and undetermined death in the 15-19-year-old age group in England and Wales.

Figure 1

Table 1 Suicide, undetermined death and accidental death by methods similar to suicide in 15-19-year-olds in England and Wales

Figure 2

Fig. 2 Suicide by poisoning by solid or liquid substances, in the 15-19-year-old age group in England and Wales.

Figure 3

Fig. 3 Suicide by poisoning with motor vehicle exhaust gas (ICD E952.0) in the 15-19-year-old age group in England and Wales.

Figure 4

Fig. 4 Suicide by hanging, strangulation and suffocation in the 15-19-year-old age group in England and Wales.

Figure 5

Table 2 Suicide, undetermined death and accidental death by methods similar to suicide in 10-14-year-olds in England and Wales

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