BMC Psychiatry

, 18:46 | Cite as

Association between migraine and suicidal behavior among Ethiopian adults

  • Hanna Y. Berhane
  • Bethannie Jamerson-Dowlen
  • Lauren E. Friedman
  • Yemane Berhane
  • Michelle A. Williams
  • Bizu Gelaye
Open Access
Research article
Part of the following topical collections:
  1. Causes, treatment and prevention of suicide

Abstract

Background

Despite the significant impact of migraine on patients and societies, few studies in low- and middle-income countries (LMICs) have investigated the association between migraine and suicidal behavior. The objective of our study is to examine the extent to which migraines are associated with suicidal behavior (including suicidal ideation, plans, and attempts) in a well-characterized study of urban dwelling Ethiopian adults.

Methods

We enrolled 1060 outpatient adults attending St. Paul hospital in Addis Ababa, Ethiopia. Standardized questionnaires were used to collect data on socio-demographics, and lifestyle characteristics. Migraine classification was based on the International Classification of Headache Disorders-2 diagnostic criteria. The Composite International Diagnostic Interview (CIDI) was used to assess depression and suicidal behaviors (i.e. ideation, plans and attempts). Multivariable logistic regression models were used to estimate adjusted odds ratio (AOR) and 95% confidence intervals (95% CIs).

Results

The prevalence of suicidal behavior was 15.1%, with a higher suicidal behavior among those who had migraines (61.9%). After adjusting for confounders including substance use and socio-demographic factors, migraine was associated with a 2.7-fold increased odds of suicidal behavior (AOR = 2.7; 95% CI 1.88–3.89). When stratified by their history of depression in the past year, migraine without depression was significantly associated with suicidal behavior (AOR: 2.27, 95% Cl: 1.49–3.46). The odds of suicidal behavior did not reach statistical significance in migraineurs with depression (AOR: 1.64, 95% CI: 0.40–6.69).

Conclusion

Our study indicates that migraine is associated with increased odds of suicidal behavior in this population. Given the serious public health implications this has, attention should be given to the treatment and management of migraine at a community level.

Keywords

Migraine Suicidal behavior Ethiopia 

Abbreviations

AOR

Adjust Odds Ratio

CI

Confidence Interval

CIDI

Composite International Diagnostic Interview

DSM-IV

Diagnostic and Statistical Manual of Mental Disorders, 4th Edition

ICD-10

International Classification of Diseases, 10th revision

ICHD-II

International Classification of Headache Disorders-2

LMICs

Low- and Middle-Income Countries

MMD

Major Depressive Disorder

OR

Odds Ratio

Background

Migraine is an under diagnosed and recurrent headache that is associated with sensitivity to light, nausea, or a reduced ability to function [1]. Migraine is a highly prevalent neurological disorder, affecting 1 out of every 10 individuals globally [1, 2, 3]. In Africa, though it is estimated that 5–10% of the population suffer from migraines [4, 5]; there is a scarcity of researches focusing on migraine.Higher prevalence have been reported among urban residents [4, 6], and women [5, 6, 7, 8]. Earlier studies have also shown that migraine is higher among young adults (18–29) years [5].

Depending on the level of intensity during each episodes, migraine often has direct and immediate impact on patients’ daily activities. Its manifestations range from inability to lead a productive life due to loss of work/school days to withdrawal from social and leisure activities which ultimately affect the quality of life [9, 10]. Additionally, migraine disorders have been associated with psychiatric comorbidities including substance abuse, mood and anxiety disorders, depression, and suicidal behaviors [11, 12, 13, 14, 15, 16, 17, 18, 19, 20]. Suicidal thoughts and behaviors (hereafter referred to as suicidal behaviors) which include suicidal ideation, plans, and attempts are predictors of completed suicide [21, 22].

Annually more than half a million people die due to suicide; while three-fourth of this deaths are in low and middle income countries (LAMICs) [23].Despite the profound personal, societal, and economic consequences both these problems have; knowledge pertaining to their association remain limited, particularly in LAMICs. Though previous research have shown the association between migraine and suicidal behaviors [16, 19, 20, 24]; no studies in sub-Saharan Africa have investigated this association. Due to the high burden of migraine in sub-Saharan Africa and the existing knowledge gap, we sought to evaluate the extent to which migraine headaches are associated with suicidal behaviors, including suicidal ideation, plan, and attempts, in a well-characterized study of urban dwelling Ethiopian adults.

Methods

Study design and population

This cross-sectional study enrolled 1060 participants attending the outpatient facility at the Saint Paul Hospital in Addis Ababa, Ethiopia. All patients evaluated in the internal medicine, general surgery and gynecological outpatient departments during the period of December to July 2011 were eligible to be included in the study. Those who were unable to communicate with the interviewers directly (those with diagnosed mental disabilities and hearing disabilities) were excluded. Interviewer administered structured questionnaires were used to collect data from all individuals who have consented to participate. Prior to data collection; the interviewers who were nurses by training were given an intensive training on: the contents of the questionnaire, interview techniques and ethical conduct of human subjects research. Continuous supervision and support was provided by the research coordinator throughout the period of data collection.

Major depressive disorder and suicidal behavior

Major depressive disorder (MDD) and suicidal behavior were assessed using the depression module of the Composite International Diagnostic Interview (CIDI) 3.0 [25]. The CIDI is a fully-structured interview that assesses mental disorders according to the definitions and criteria of the ICD-10 [26] and DSM-IV [27]. For this study we used the DSM-IV definition of MDD: presence of five out of nine depressive symptoms that persist for 2 weeks or longer, are present for most of the day nearly every day, and cause significant distress or impairment [27].

Suicidal behavior was classified as ideation, attempt, and plan based on participant self-report [28]. Participants answered questions relevant to the presence of ideation, plan(s) and/or attempts during their most crucial depressive episode within the past year. In particular, the following questions were included: “During that period, did you ever think that it would be better if you were dead?”, “Did you make a suicide plan?” and “Did you make a suicide attempt?” if the respondent responded “Yes” to either of the three questions the individual was classified as having suicidal behaviors.

Migraine disorders

For migraine, we used a structured migraine assessment questionnaire adapted from previously validated tool [29] . Migraine was classified according to the ICHD-II criteria [30]; it was defined by at least 5 lifetime headache attacks lasting 4–72 h, with at least 2 of the four qualifying pain characteristics (unilateral location, pulsating quality, moderate or severe pain intensity, aggravation by or causing avoidance of routine physical activity) and at least one of the associated symptoms (nausea and/or vomiting, or photo and photophobia).

Other covariates

Structured questionnaires were used to collected data on socio-demographic characteristics, including sex, age (in years), and marital status (married, never married, other). Other socio-demographic covariates included: education (≤primary, secondary education, college graduate), smoking status (never, former, current), past year alcohol consumption (non-drinker, < once per month, ≥ 1 day per week), khat chewing (never, former, current), body mass index (BMI) (<18.5, 18.5–24.9, 24.9–29.9, ≥30 kg/m2), and self-reported physical and mental health status (excellent/very good/good vs. fair/poor).

Statistical analysis

Data analyses was conducted using SPSS version 23.0 (IBM SPSS, Chicago, IL). Continuous variables were summarized as means (± standard deviation), and categorical variables as number and percentages. Multivariable logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (95% CI). Forward logistic regression modeling procedures combined with the change in-estimate approach were used to select the final multivariable adjusted models on the association between migraine and suicidal behaviors. Variables of a priori interest (e.g., age and sex) were included in final models. Previous studies have shown that depression is associated with suicidal behaviors and migraine. We therefore performed a sensitivity analysis stratifying our analysis by current(past year) depression status. Reported p-values are two-sided with a statistical significance set at p < 0.05.

Results

A total of 1060 individuals with a mean age of 35.7 ± 12.1 years took part in this study. Of those, the majority were women (60%), married (51.3%) and had a low educational level (< grade 6) (44.7%). Current smoking and Khat use was reported by 4.1% and 20.6% of participants, respectively. When asked about their health status more than half of the participants reported having a good, very good, or excellent physical (56.2%) and mental health (65.9%). Percentage of those having depression (life time and in past year) was 24.7% while any suicidal behavior was 15.1% (Table 1).
Table 1

Socio-demographic and reproductive characteristics of the study population according to types of migraine (N = 1060)

Characteristics

All participants (N = 1060)

No migraine

(N = 639)

Migraine

(N = 421)

P-value

n

%

n

%

n

%

Age (years)a

35.68 ± 12.08

35.95 ± 12.10

35.28 ± 12.05

0.378

Sex

 Women

637

60.1

330

51.6

307

72.9

< 0.001

 Men

423

39.9

309

48.4

114

27.1

Marital Status

 Married

542

51.3

342

53.7

200

47.6

0.011

 Never married

335

31.7

204

32.0

131

31.2

 Other

180

17.0

91

14.3

89

21.2

Education

  ≤ Primary (1–6)

474

44.7

248

38.8

226

53.7

< 0.001

 Secondary (7–12)

357

33.7

233

36.5

124

29.5

 College graduate

229

21.6

158

24.7

71

16.9

Smoking status

 Never

913

86.1

534

83.6

379

90.0

0.010

 Former

104

9.8

76

11.9

28

6.7

 Current

43

4.1

29

4.5

14

3.3

Alcohol consumption past year

 Non-drinker

601

56.7

340

53.2

261

62.0

0.002

  < once a month

357

33.7

223

34.9

134

31.8

  ≥ 1 day a week

102

9.6

76

11.9

26

6.2

Khat chewing

 Never

783

73.9

455

71.2

328

77.9

0.052

 Former

59

5.6

39

6.1

20

4.8

 Current

218

20.6

145

22.7

73

17.3

Body mass index (kg/m2)

  < 18.5

174

16.5

111

17.4

63

15.1

0.252

 18.5–24.9

629

59.7

373

58.6

256

61.4

 24.9–29.9

184

17.5

118

18.5

66

15.8

  ≥ 30

67

6.4

35

5.5

32

7.7

Self-reported physical health

 Excellent/very good/good

596

56.2

410

64.2

186

44.2

< 0.001

 Poor/fair

464

43.8

229

35.8

235

55.8

Self-reported mental health

 Excellent/very good/good

699

65.9

478

74.8

221

52.5

< 0.001

 Poor/fair

361

34.1

161

25.2

200

47.5

 

Depression (past year)

70

6.6

23

3.6

47

11.2

< 0.001

Depression (lifetime)

192

18.1

73

11.4

119

28.3

< 0.001

Suicidal behavior (any type) b

160

15.1

61

9.5

99

23.5

< 0.001

 Suicidal ideation

154

14.5

60

9.4

94

22.3

< 0.001

 Suicidal plan

65

6.1

25

3.9

40

9.5

< 0.001

 Suicidal attempt

44

4.2

16

2.5

28

6.7

0.001

Due to missing data, percentages may not add up to 100%

aMean ± standard deviation (SD)

bNon-mutually exclusive subcomponents

For continuous variables, P-value was calculated using the one-way ANOVA; for categorical variables, P-value was calculated using the Chi-square test

Any suicidal behavior was reported by 160 (15.1%) study participants; which included suicidal ideation (14.5%), suicide plan (6.1%) or suicide attempt (4.2%). Characteristics of study participants by migraine status is also presented in Table 1. Migrainuers were more likely to be women, have less education and were more likely to report their physical or mental health status as fair or poor. Participants with migraine were also more likely to report depression (both past year and lifetime) and suicidal behaviors, including suicide ideation, plan, or attempt (p ≤ 0.001).

Characteristics of the study population according to suicidal behavior are shown in Table 2. Participants with any suicidal behavior were more likely to be women, married, and more likely to have self-reported fair/poor physical and mental health status. Participants with any suicidal behaviors were also more likely to have past year or lifetime depression (p < 0.01).
Table 2

Socio-demographic and reproductive characteristics of the study population according to suicidal behavior (N = 1060)

Characteristics

No suicidal behavior

(N = 900)

Any suicidal behavior

(N = 160)

P-value

n

%

n

%

 

Age (years)a

35.73 ± 12.13

35.42 ± 11.83

0.766

Sex

 Women

526

58.4

111

69.4

0.011

 Men

374

41.6

49

30.6

Marital Status

 Married

474

52.8

68

42.5

0.004

 Never married

284

31.7

51

31.9

 Other

139

15.5

41

25.6

Education

  ≤ Primary (1–6)

402

44.7

72

45.0

0.850

 Secondary (7–12)

301

33.4

56

35.0

 

 College graduate

197

21.9

32

20.0

 

Smoking status

 Never

778

86.4

135

84.4

0.628

 Former

85

9.4

19

11.9

 

 Current

37

4.1

6

3.8

 

Alcohol consumption past year

 Non-drinker

499

55.4

102

63.7

0.098

  < once a month

309

34.3

48

30.0

 

  ≥ 1 day a week

92

10.2

10

6.3

 

Khat chewing

 None

667

74.1

116

72.5

0.569

 Former

52

5.8

7

4.4

 

 Current

181

20.1

37

23.1

 

Body mass index (kg/m2)

  < 18.5

147

16.4

27

17.1

0.549

 18.5–24.9

539

60.2

90

57.0

 24.9–29.9

157

17.5

27

17.1

  ≥ 30

53

5.9

14

8.9

Self-reported physical health

 Excellent/very good/good

537

59.7

59

36.9

< 0.001

 Poor/fair

363

40.3

101

63.1

 

Self-reported mental health

 Excellent/very good/good

631

70.1

68

42.5

< 0.001

 Poor/fair

269

29.9

92

57.5

 

Depression (past year)

21

2.3%

49

30.6

< 0.001

Depression (lifetime)

69

7.7

123

76.9

< 0.001

Due to missing data, percentages may not add up to 100%

aMean ± standard deviation (SD)

For continuous variables, P-value was calculated using the one-way ANOVA; for categorical variables, P-value was calculated using the Chi-square test

The presence of migraine was associated with a 2.91-fold increased odds of suicidal behavior (OR: 2.91, 95% Cl: 2.06–4.12) as compared to participants without migraine. After adjusting for confounders including age, sex, education, and BMI, migrainuers were 2.71-times more likely to report suicidal behaviors compared to non-migrainuers (AOR:2.71, 95% CI: 1.89–3.89). The results remained similar after further adjusting for khat chewing and past year alcohol consumption (AOR: 2.70, 95% CI: 1.88–3.89). When life time history of depression was added to the model, the association between migraine and suicidal behaviors was greatly attenuated and became statistically insignificant (AOR: 1.49, 95% CI: 0.93–2.39) (Table 3).
Table 3

Association between migraine and suicidal behavior (N = 1060)

 

No suicidal behavior

(N = 900)

Any suicidal behavior

(N = 160)

n

%

n

%

Unadjusted OR

(95% CI)

Adjusted OR

(95% CI)a

Adjusted OR

(95% CI)b

Adjusted OR

(95% CI) c

No Migraine

578

64.2

61

38.1

Reference

Reference

Reference

Reference

Migraine

322

35.8

99

61.9

2.91 (2.06–4.12)

2.71 (1.89–3.89)

2.70 (1.88–3.89)

1.49 (0.93–2.39)

Abbreviations: OR odds ratio, CI confidence interval

aAdjusted for age (continuous), sex, education, and BMI categories

bAdjusted for age (continuous), sex, education, BMI categories, khat chewing, and past year alcohol consumption

cAdjusted for age (continuous), sex, education, BMI categories, khat chewing, past year alcohol consumption, and lifetime depression

We next explored the association between migraine and suicidal behavior after stratifying by past year depression status (Table 4). Among individuals without a history of depression (in the past year), the odds of suicidal behavior was 2-times higher among those with migraine as compared to those without migraine in a fully adjusted model (AOR: 2.27, 95% Cl: 1.49–3.46). Among individuals with a history of depression (in the past year), the odds of suicidal behavior was modestly increased but did not reach statistical significance for migraineurs as compared with those without migraine (AOR: 1.64 95% CI: 0.40–6.69).
Table 4

Association between migraine and suicidal behavior stratified by past year depression status (N = 1060)

Migraine

Without Depression

No suicidal behavior

(N = 879)

Any suicidal behavior

(N = 111)

n

%

n

%

Unadjusted OR

(95% CI)

Adjusted OR

(95% CI)a

Adjusted OR

(95% CI)b

No migraine

570

64.8

46

41.4

Reference

Reference

Reference

Migraine

309

35.2

65

58.6

2.61 (1.74–3.90)

2.27 (1.49–3.46)

2.27 (1.49–3.46)

Migraine

No suicidal behavior

Any suicidal behavior

With Depression

(N = 21)

(N = 49)

No migraine

8

38.1

15

30.6

Reference

Reference

Reference

Migraine

13

61.9

34

69.4

1.40 (0.48–4.07)

1.22 (0.36–4.13)

1.64 (0.40–6.69)

Abbreviations: OR odds ratio, CI confidence interval

aAdjusted for age (continuous), sex, education, and BMI categories

bAdjusted for age (continuous), sex, education, BMI categories, khat chewing, and past year alcohol consumption

Discussion

Our results show that migraine is significantly associated with suicidal behaviors (including suicidal ideation, plan, or attempts), after adjusting for confounders including age, sex, BMI, education, khat use, and past year alcohol consumption. However, when lifetime depression was fitted in the model, a statistically significant association was not observed. Following further analysis to understand the effect of depression; it was found that migrainuers without history of depression in the past year had a 2.27-fold increased odds of suicidal behaviors as compared to non-migrainuers.

Migraine had a strong positive association with increased odds of suicidal ideation and attempts; this association has been also established from previous studies in high income countries including the US, Canada, Taiwan, Norway, Italy, and Korea [15, 20]. For example, a recent study among members of a Health Maintenance Organization in Michigan found that migraineurs had an increased risk of suicidal attempts during a 2 year follow-up [19]. The pooled analysis from a recent meta-analysis also found that migraine with aura was associated with increased odds of suicidal ideation (AOR: 1.31; 95% CI: 1.10–1.55), while no statistical association was observed for migraine without aura [31]. Similarly, suicidal attempts were found to be 3 to 7 times higher among those with migraines in a two- year follow up study [14, 16].

Chronic migraine is often comorbid with other conditions such as depression;a recent study in India found significant comorbidity between psychiatric disorders, including anxiety, depressive disorders, suicidality, and headache disorders [32]. Likewise, a study from Lima, Peru found that migrainuers without depression had an 1.8-fold increased odds of suicidal ideation while those with both migraine and depression had a 4.1 folds increased odds after adjusting for confounder [20]. This is contrary to our finding, adding history of life-time depression to the model resulted in no statically significant association between migraine and suicidal behaviors.However when we stratified individuals with their current (past year) depression status; participants with migraine and no depression has 2.27 fold increased odds of suicidal behavior (95% CI: 1.49–3.46). In line with this, Pompili et al. in their review found that the association of migraine and suicidal attempts was not necessarily due to coexting depression; but rather the chronic pain and loss of pleasure to engage in activities that is an independent risk factor for suicide [33].

Previous studies have documented the biological links between migraine and suicidal behaviors. Investigators suggest that the levels of cortisol and functioning of the hypothalamic-pituitary-adrenocortical (HPA) axis are affected by stressful events. Specifically, HPA activity has been found to be correlated with low grade cognitive stress in migraineurs [34]. Individuals with history of suicidal attempts were also found to have lower basal cortisol levels [35]. Furthermore in a study conducted among adolescent females, HPA-axis responses were associated to stress and risk of suicidal ideation [36]. Stressful events, including migraines, depression, and suicidal behaviors, may also be associated with serotonin levels. Changes in regulation and abnormalities of serotonergic mechanisms, including serotonin transporters, receptors, and metabolites have been associated with migraines and suicidal behaviors [37, 38]. Lastly chronic pain conditions, including migraine headaches, have been associated with suicidality [39, 40, 41]. Specifically, Ilgen et al. found an association between measures of head pain and suicidal ideation or attempts [40]. Chronic pain patients have an increased prevalence of suicidal ideation and attempts [42].

In the present study, there are a few limitations that should be considered. We used a cross-sectional study design which limits our inferences on the temporality between migraine and suicidal behaviors. Additionally, our hospital-based study population may limit our study findings generalizability to a broader general population. Our study used interviewer administered questionnaires in which the participants were asked questions about their physical and mental health, due to the social desirability bias participants may under-report their history of suicidal thought and behaviors and substance use. Migraine status could also be under reported as it could be affected by recall bias.

Conclusion

Migraine is associated with increased odds of suicidal behaviors, including suicidal ideation, plans, and attempts, among urban Ethiopian adults. Studies should further investigate this comorbidity and possible risk factors for these disorders. Efforts should also be made to raise awareness about the burdens posed by migraine among the public as well as health professionals. In addition, health professionals should be aware of the comorbidity between migraine, depression, and suicidal thought and behaviors to implement effective screening and treatment of these comorbid disorders.

Notes

Acknowledgments

The authors wish to thank the staff of Addis Continental Institute of Public Health for their expert technical assistance. The authors would also like to thank the Saint Paul Hospital for granting access to conduct the study.

Funding

This research was supported by an award from the National Institutes of Health (NIH), the National Institute for Minority Health and Health Disparities (T37-MD0001449). The sponsor had no role in the design of the study, nor in the data collection, analysis and write up of this research article.

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Authors’ contributions

HB and BJD analyzed, interpreted the data and drafted the manuscript. BG assisted the analysis process as well as the drafting the results section. LF, YB, MW, and BG were responsible for the conceptualization of the research project, data collection and management and have contributed in the interpretation of the results. All authors have read and approved the final manuscript.

Ethics approval and consent to participate

The study protocol was approved by the institutional review board of Addis Continental Institute of Public Health Addis Ababa, Ethiopia and the Office of Human Research Administration, Harvard T.H. Chan School of Public Health, Boston, MA. Study objectives were explained to participants and written informed consent was obtained prior to the data collection.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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© The Author(s). 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors and Affiliations

  • Hanna Y. Berhane
    • 1
  • Bethannie Jamerson-Dowlen
    • 2
  • Lauren E. Friedman
    • 2
  • Yemane Berhane
    • 1
  • Michelle A. Williams
    • 2
  • Bizu Gelaye
    • 2
  1. 1.Addis Continental Institute of Public HealthAddis AbabaEthiopia
  2. 2.Department of EpidemiologyHarvard T.H. Chan School of Public HealthBostonUSA

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