45
ASAA
Rosado MSV, Silva-Néto RN.
Headache triggered by sleep deprivation an observational study
Introduction
I
n primary headaches, headache attacks may be triggered by
several factors, such as stress, eating habits, sensory stimuli,
menstrual changes and sleep deprivation, especially in patients with
migraine.
1,2
The prevalence of headache attacks triggered by sleep
deprivation in migraine patients ranges from 28.5% to 56.7%
3,4,5
and in patients with tension-type headache (TTH) it is 28.8%
3
.
There is a relationship between sleep and primary headaches as
a trigger for headache attacks, both deprivation and excess sleep
6
,
but this mechanism is not fully understood, despite being a frequent
complaint of migraine and TTH patients
7
. On the other hand, res-
torative sleep with sufcient sleep hours works as a relief factor for
headache attacks.
8
Almost half of the population has some sleep disorder, mainly
insomnia
9
. Sleep disorders represent an important public health
problem in the world and are comorbidities of primary headaches.
In contrast, primary headaches have great social impact and risk
of chronication.
10,11
Despite the social impact, headache attacks triggered by sleep de-
privation in patients with migraine or TTH have not been sufciently
studied. This is the rst Brazilian population study on headache
triggered by sleep deprivation.
Patients and methods
Study design and patients
A prospective, cross-sectional, group comparative study was conduc-A prospective, cross-sectional, group comparative study was conduc-
ted on a non-random and convenience sampling which was selected ted on a non-random and convenience sampling which was selected
from night workers of a public hospital and invited to participate in from night workers of a public hospital and invited to participate in
this research. The sample consisted of 71 night workers diagnosed this research. The sample consisted of 71 night workers diagnosed
with primary headaches according to the ICHD-3 criteria.with primary headaches according to the ICHD-3 criteria.
1212
Inclusion and exclusion criteriaInclusion and exclusion criteria
The study included night workers of a public hospital, aged 18 to 50 The study included night workers of a public hospital, aged 18 to 50
years diagnosed with primary headaches according to the ICHD-3 years diagnosed with primary headaches according to the ICHD-3
criteriacriteria
1212
who agreed to undergo an interview. Those who reported who agreed to undergo an interview. Those who reported
daily or almost daily headache, no headache in the last 12 months, daily or almost daily headache, no headache in the last 12 months,
association of two or more primary headaches, concomitantly or at association of two or more primary headaches, concomitantly or at
different times, secondary headaches, and pregnant women weredifferent times, secondary headaches, and pregnant women were
excluded.excluded.
Data collection
After fulfilling the inclusion and exclusion criteria, a structured
interview was conducted, based on a questionnaire to diagnose the
presence of headache on the day after night shift. The number of
times the worker slept at work and the number of hours he/she slept
at home and at work were investigated.
Statistical analysis
Organized the information in a database, the Statistical Package
for Social Sciences (SPSS™) version 22.0 was used for statistical
analysis. The chi-square test with Yates correction, Student’s t-test and
Fisher’s exact test were used for the difference of means of unpaired
samples, with a signicance level of 0.05.
Ethical aspects
This study was approved by the Ethics in Research Involving Human
Subjects Committee at the Federal University of Piauí, protocol
number 3,305,167 and the National Ethics in Research System,
registry number 08850918.0.0000.5214, on May 6, 2019. Data
were collected from May to June 2019 and all volunteers signed the
Informed Consent Form.
Results
Seventy-one night workers, aged 36.7±7.7 years, ranging from 22
to 50 years, were investigated, of which 50 (70.4%) were women,
corresponding to the sex ratio of 1:4.9 male/female. After headache
diagnosis, it was found that 59 (83.1%) workers had migraine and
12 (16.9%) met the diagnostic criteria for TTH. Migraine affected
workers aged 36.0±7.6 years, while in TTH, the age was 35.8±8.8
years (p=0.935) (Table 1).
Table 1. Distribution of sex and age according to diagnosis of 59 migraine
patients and 12 with tension-type headache
Variables Diagnosis Migraine TTH
Gender
Female (n; %) 45 (76.3) 5 (41.7) 0.032*
Male (n; %) 14 (23.7) 7 (58.3)
Age (years)
Mean (SD) 36.0 (7.6) 35.8 (8.8) 0.935**
Variation 23-50 22-50
Note: TTH - tension-type headache; SD - standard deviation; * - p-value
based on Fisher's exact test for mean difference of unpaired samples. ** - p
value based on Student's t-test for mean differences in unpaired samples
The number of monthly night shifts was greater than 10 in 50.8%
of migraine patients and 58.3% of patients with TTH (p=0.876).
We found that 91.5% of migraine patients and 83.3% of patients
with TTH slept six or more hours a night when they were at home,
but when on duty, 100% slept four hours or less a night (Table 2).