Pattern and characterization of headache among adult patients visiting the neurology clinic in Benin City Nigeria

Context: Headache is one of the commonest reasons for neurology clinic consultation worldwide, but there is a dearth of knowledge regarding the pattern and characteristics of headache in parts of the southern region of Nigeria. Objectives: This study aims to describe the pattern and characteristics of headaches among adult patients attending a neurology clinic. Material and Methods: This was a cross-sectional study, done at the neurology clinic, Central Hospital Benin City. Adults with headache complaints were consecutively recruited using a structured questionnaire. Demographics of participants, headache characteristics, investigations and treatment were captured, while SPSS version 21 was used for data analysis Results: During the 7-month study period (February to September 2018), three hundred and sixty-eight patients attended the neurology clinic, of which one hundred and ten were recruited (29.9%, 110/368). The mean age of participants was 52.0(16.5) yrs. Headache was commoner in the female (69.1%) than the male (30.9%) participants. About half of the patients had 1-5 episodes of headaches in the previous six months, with majority of them attributing stress (47.3%), noise (31.8%), fatigue (28.2%) and lack of sleep (20.0%) as the main triggers of their headache. Reduced work productivity was observed in 52% of respondents, while 50.2% of participants self-treated themselves with the majority (64.5%), of them taking acetaminophen for their headache Conclusion: There is the need for a greater public awareness on headache to stem the self-treatment behavior that was observed, which would enable a more holistic care of the headache condition.


Introduction
Headache involves pain in the head and is a common symptom in the population, affecting people of all 1 ages, races, income levels and geographical areas.It can arise from various disorders ranging from a trivial ailment to the most severe disabling organic 2,3 pathologies.Primary headache disorders such as migraine, tension type headache, cluster headache and the so called chronic daily headache syndrome can cause substantial levels of disability leading to reduce quality of life, absenteeism from work and loss of .4, 5. productivity Headache can also be caused by or occur secondarily to a long list of other conditions, the most common of which is medication overuse headache.Global burden of disease 2010, showed that tension type headache and migraine are the 6, 7, second and third most prevalent disease globally and have been labeled distinct entities by the 8 international headache societies.Headache is perhaps the commonest neurological disorder, yet throughout the world, headache has been and continues to be underestimated in scope and scale and has remained under-recognized, under-1, 9 diagnosed and under-treated.Worldwide, it is estimated that 50% of people practice self-medication without seeking care from a doctor leading to inappropriate management and sometimes analgesic abuse causing treatment 10 failures.Moreover in some African communities, headache is considered as a relatively trivial condition compared to other more basic and 3 demanding socio-economic problems.The burden of headache is very large; it is one of the commonest reasons for visiting the neurology clinic worldwide.About 45million persons in the United States are sufferers of chronic headache.Repeated headache attacks and in particular the constant fear of the next one damage family life, socio economic life and 1 employment.Globally the prevalence of headache disorders in general, in the adult population is 46%, for migraine 11%, for tension type headache 42%, 9 and for chronic daily headache 3%.Studies from Africa put the prevalence rates of migraine between 3% -6.9%, chronic tension type headache 1.7% and 3 in general 20%.Several studies have been done on headache disorders worldwide, but there is scanty data on this globally disabling disease in sub-Sahara Africa in general and in Nigeria in particular.We are not aware of any study from the south-south region of Nigeria that has looked at the epidemiology of headache.In this study we determined the pattern and characteristics of headache among adults attending the neurology clinic, by examining the frequency, triggers, temporal profile, and disability of headaches as well as its associated comorbidities.It is hoped that this study would bridge the knowledge gap and provide insight into the care of sufferers of headaches.

Materials and method
This was a cross sectional study done in the outpatient Neurology Clinic at the Central Hospital, Benin City between February to September 2018.Adult patients eighteen years and above visiting the neurology clinic with a chief complaint of headache were consecutively recruited for the study.Informed consent was obtained from participants or relatives.A face to face interview using a structured questionnaire was done by the authors and residents of the neurology unit who had earlier been trained on it.The questionnaire utilized was designed based on the review of the literature on 2,3,4,8,9 headache.
It has five sections, these are; 1. Demographics which includes the age, gender, ethnicity, occupation, marital status, religion and educational status.2. The characteristics of the headache which includes number of episodes in past six months, duration, usual time of day, severity, usual location, nature, predisposing conditions, warning signs, presence or absence of other symptoms such as fever, nausea, vomiting, diarrhea, confusion, numbness in arms and legs, and clinical signs of cranial sympathetic dysfunction such as nasal congestion, redness of the eyes, sinusitis, lacrimation, ptosis and eyelid edema.3. Management received such as self-medication, never received treatment, being managed by a health worker.4. Investigations done for the headache which includes laboratory and imaging study.5. Treatment received such as antimalarial, ergotamine, acetaminophen, tramadol etc., and measures employed to obtain relief from the headache including use of eye glasses, relaxation, cold compress, eating, and massage were recorded.This study was approved by the Ethics and Research Committee Central Hospital Benin City.Data analysis: was done using SPSS version 21.Mean, median, standard deviation and range were used to summarize continuous variables while frequency and percentage described categorical variables.Student's t test for comparison and chi-square for association respectively.Level of P ≤ 0.05 was considered as significant.

Results
A total of 368 patients attended the neurology clinic during the 7-month study period (February to September 2018) of which one hundred and ten patients were recruited (29.9%, 110/368).The mean age was 52.0 + 16.5 years with a range of 18 to 89 years.There were 76 (69.1%) females and 34 (30.9%)males.The main ethnic group were the Binis.Eighty-four (76.4%) of the patients were married while 15 (13.6%) were singles.Those who had secondary education were the highest of the study group which constituted 40.9%, followed by tertiary education 35.5% and primary education 18.2%.Table 1.There was a higher prevalence of headache amongst the females patients as 69.1% of the study population were females and 30.9% of them males.About half of the patients (50%), had 1-5 episodes of headaches, a third (31.8%), had 6-10 episodes, while 9.1% and 8.2% had 11-15 and 16-20 episodes respectively.4.5% of patients experienced their headaches for several weeks, 10.9% had theirs for days, 41.8% had theirs for hours, 39.1% for minutes while 3.6% for few seconds.Table II.The usual time of day for headache was in the afternoon in 25.5% of the subjects, night for 21.8%, morning for 16.4%, while 22.7% had no particular time for experiencing the headaches.However headache was continuous in 18.6% of the study population.Majority of the patient (46.4%) had headache of moderate severity but was mild in 30% and severe in 23.6%, though not intense enough to wake patient from sleep in 61.8% of the subjects.Table II.II.The nature of the headache was reported as dull and aching in 30.0% of the patients, it was throbbing/exploding in 20.0%, sharp in 14.5%, a feeling of tightness in 4.5% and grinding in 2.7%.The location of headache was in the forehead in 50.9% of the patients, while 27.3% had headache all over the head, in 10.9% it was on the right side of the head and at the back of the head in 6.4%.Table II.Hypertension was the leading comorbid chronic medical condition in 70% of the respondents.While refractive errors, cervical spondylosis and brain tumors constituted less than 10%.Table II.The management of headache was by self-medication in most cases and this constituted 56.4% and by a health worker in 40.9%.No treatment was received in 2.7% of the cases.Table IV.The mean age of participants who self-medicated was 50.4 years while that of other respondents was 54.0 years, (P = 0.272).There was no significant association between gender and self-medication (P = 0.783).More than half of both female respondents (57.9%) and male respondents (52.9%) gave a history of selfmedication for their headaches.Respondents with less severe headaches were more likely to selfwww.ibommedicaljournal.org 107 Ibom Med.J. Vol. 13 No.2 May-Aug., 2020 medicate (P < 0.001) The median pain score for patients who self-medicated was 5, which was lower than that of respondents who did not selfmedicate (P < 0.001) There was no significant association between duration of headaches and selfmedication (P = 0.3610).The median pain score for both male and female participants was 5, (P = 0.359).Other aspects of management included, Laboratory blood investigations in 20%, imaging (CT and MRI) in 10.0% and eye check in 7.3%.Acetaminophen (over the counter drug) was the commonest treatment received in 64.5% of the respondents, followed by antimalarials (37.4%) and 35.5% had non-steroidal anti-inflammatory drugs (NSAIDs).Other relieving measures included sleeping 51.8%, relaxation 47.3%, cold compress 24.5% eating (food) 6.4%.Moving around, massage, vomiting, use of antihypertensive drugs accounted for about 10% of the relief method.Table IV.

Discussion
Our study describes the pattern, characteristic, previous management and relief measures for headache among adult patients presenting for the first time in our neurology clinic.Our results showed that headache affects more females than males.This finding agrees with reports of several 11, 12, 13, 14, other studies in which females were more affected than males.The biggest reason is attributable to fluctuations in hormones.Estrogen is a hormone that has been closely linked to headaches and this hormone fluctuation is much more prevalent in women, with changes in the level of estrogen occurring during menstruation, ovulation and pregnancy.Other reasons include genetics, and differences in threshold to stress and pain perception which is lower in females than the 15,16 males We note that the incidence of headache was evenly distributed across the various age groups but with peak incidence in the age group 50-59.This 13,14,17 is in contrast to other studies where headache was more prevalent in younger age groups 18-45yrs in both gender.The study showed that, adults 50yrs and older had a higher headache frequency (56.4%) than the younger population (43.6%).This finding agrees 18 with studies done in Malaysia which reported a much higher figure 94.3% and a lower figure from 19 Thailand 33%.Although difficult to establish, ethnic differences, marital status, and higher education level may have contributed to the observed differences.Majority of our respondents probably had primary headaches, although there was no attempts in this study to differentiate between the various types of which include tension type headache, migraine, cluster headache and the so called chronic daily headache syndrome which can cause substantial levels of disability.Majority of our patients suffered 1-5 episodes of headache in the past 6 months.Most headaches were of short to moderate duration, lasting from minutes to hours.This result is similar to findings reported in a study 20 among health workers in Enugu but in contrast to the longer duration of headaches noted in a Turkish 21 study .Other headache characteristics e.g.usual time of day, periodicity, severity and nature of pain, associated symptoms, usual location of pain, precipitating and relieving factors and medication used were also examined in this study.Distribution of these variables followed more or less a similar pattern to that of European studies and of 22,23 developing countries like Pakistan .In this study, the most common associated symptom of headache were fever, vomiting, confusion, and nausea, but in 24 a study conducted by Momayyezi et al in Yazd, the most common, symptoms reported were nausea (55.6%), vomiting (40.7%) and photophobia (85.2%) which are significantly different from present study.None of the respondents volunteered a history of seizure associated with their headaches.Stress probably related to challenges both at work and at the home front played the greatest trigger in this study.Other triggers which include noise, fatigue, lack of sleep, hunger, family problems, hot weather, accident or ill health, menstrual flow in women also played a role and were consistent with 25, 26, 27.other studies.The nature of headache was dull and aching in 30% of the patients, but was throbbing and exploding in 20% in marked contrast to the throbbing headaches 28,29 recorded in 80% of patients in some studies.
Of interest is the low rate of headache related work absenteeism.Absenteeism refers to missed days of work, leave of absence and work disability.Though headache was of moderate severity, there was no significant disability considering the effect of headache on daily activities.This could explain the as a trivial health issue, and high tolerance to pain.

29, 30
Other reasons include lack of adequate health facilities, very low economic power and the preference by African patients to consult alternative medicine practitioners for pain relief may also be contributory.In our study, respondents with less severe headache were more likely to self-medicate and this was statistically significant P<0.001.The headache sufferers in this study reported using medications for relief of headache.The drug most commonly used was acetaminophen (64.5%).This finding is similar to that of hospital workers in 20 Enugu, in south east Nigeria where a higher percentage 83.8% was reported.A high percentage of our patients also reported the use of antimalarials 21 and NSAIDs as seen in the Turkish study.25 Similarly, studies from India and Ardebil (2004) also reported the massive use of pain killers as treatment for headache.Sleep (51.8%) and relaxation (47.3%) were the leading alternative relieving factors utilized in this study.These lifestyle modifications to manage headache was 20 also reported by participants in studies from Enugu 25 and India.It is worthy of note that 70% of the participants in this study had hypertension as a comorbid chronic medical condition that may cause headache, but only one patient (0.9%) received antihypertensive drugs.This is in contract to 8.5% of participants who 20 had hypertension in the Enugu study although it was not stated if those patients received antihypertensive as a relieving treatment for headache.Limitations: This study did not address distinct entities of headache even though most patients probably had primary headaches.The study covered only a 6 month period, more over the small sample size calls for a larger study where the focus on the types and classification of headaches can be emphasized.However these short comings do not affect the main purpose of the study.

Conclusion
This study shows that about 30% (110/368) of patients attending the neurology clinic in Benin City had headache complaints.It is quite a prevalent condition, affecting the female than the male patients.Though headache was of moderate severity in these patients, there was no significant disability, and there was a low rate of headache related work absenteeism.Stress both at work and at the home front played the greatest trigger in this study.More than half of the respondent gave a history of self-medication.

Table 2 : Pattern and characteristic features of the headache
* Multiple responses allowed Ibom Med.J. Vol.13 No.2 May-Aug., 2020 Odiase Francis, E. et al Pattern and characterization of headache among adult patients...

Table 3 : Comparison of headache characteristics based on gender
Ibom Med.J. Vol.13 No.2 May-Aug., 2020Odiase Francis, E. et alPattern and characterization of headache among adult patients...