Open Journal of Depression
2014. Vol.3, No.1, 18-23
Published Online February 2014 in SciRes (http://www.scirp.org/journal/ojd) http://dx.doi.org/10.4236/ojd.2014.31006
Association between Depression and Social Demographic
Factors in a Nigerian Family Practice Setting
R. O. Shittu1*, L. O. Odeigah2, B. A. Issa3, G. T. Olanrewaju3,
A. O. Mahmoud4, M. A. Sanni5
1Department of Family Medicine, Kwara State Specialist Hospital, Sobi, Ilorin, Nigeria
2Department of Family Medicine, University of Ilorin Teaching Hospital, Ilorin, Nigeria
3Department of Behavioural Sciences, University of Ilorin Teaching Hospital, Ilorin, Nigerias
4Department of Ophthalmology, University of Ilorin Teaching Hospital, Ilorin, sNigeria
5Department of Haematology, Kwara State Specialist Hospital, Sobi, Ilorin, Nigeria
Email: *firstname.lastname@example.org, email@example.com, firstname.lastname@example.org,
email@example.com, firstname.lastname@example.org, maska email@example.com
Received December 7th, 2013; revised January 11th, 2014; accepted January 20th, 2014
Copyright © 2014 R. O. Shittu et al. This is an open access article distrib uted under the Creative Commons At-
tribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the
original work is properly cited. In accordance of the Creative Commons Attribution License all Copyrights ©
2014 are reserved for SCIRP and the owner of the intellectu al property R. O. Shittu et al. All Copyright © 2014
are guarded by law and by SCIRP as a guardian.
Objectives: Although depression is one of the more common illnesses in outpatients’ clinic, it is often
overlooked. Besides accurate identification and treatment is challenging. As pertinent as demographic
factors are in explaining the variability of depressive symptoms, there is paucity of data in Nigeria in par-
ticular, and West Africa in general, hence the need to bring into lime light the association between de-
pression symptoms and socio-demographic factors in a General Outpatients Clinic in Nigeria, West Afri-
ca. Methods: Following institutional ethics committee approval, four hundred newly registered patients
who attended the General Out Patients Department (GOPD) of Kwara State Specialist Hospital, Ilorin,
Nigeria, were selected by systematic random sampling and studied. The Patients Health Questionnaire-9
(PHQ-9) specifically developed for use in primary care with acceptable reliability, validity, sensitively
was used. Association between each socio-demographic factor and depression was sought. Results: One
hundred and seventy eight (44.5%) out of the four hundred respondents were found to have one form of
depression or the other. There was minimal depression in 119 (29.8%), mild in 54 (13.4%), moderate in 2
(0.5%), and severe in 3 (0.8%). There was strong statistical association between depression and age group,
sex, marital status, level of education, occupation and monthly income, p-values 0.008, 0.000, 0.000,
0.003, 0.000, 0.001 respectively. However, religion (p = 0.541) and ethnicity (p = 0.567) were of no sta-
tistical importanc e. Conclusion: The prevalence of depressive symptoms among patients attending family
practice clinics was high. There was also strong association between depression and socio-demographic
factor. Family physician should have high index of suspicion to patients with vague somatic complaints
and the aforementioned socio-demographic factors. Early detection of depression can be enhanced by
screening patients for this disorder, when they attend the hospital for other reasons.
Keywords: Depression; Social Demographic Factors; Nigerian; Family Practice Setting
Depression is among the leading causes of disability in adults.
It affects individuals, families, business, and society (USPSTF
2010). The Task Force of Community Preventive Services re-
commended clinic-based depressive care management to reduce
depression in older adults on the basis of sufficient evidence
and home base depressive care management (USPSTF 2010).
In 2002, the US Preventive Services Task Force (USPSTF)
found at least fair evidence to recommend that adults should be
screened for depression in clinical practices that have system in
place to ensure accurate diagnosis, effective treatment and fol-
low up (Corson, Gerrity, & Dobscha, 2004).
Depressive symptoms in family practice clinics are often un-
detected, despite the fact that they constituted a major presenta-
tion in general outpatients clinics (Morakinyo, 2002; Ohaeri &
Jegede, 1991; Jegede, 1999; Krupinski & Tiller, 2001). The pre-
valence rates of depression range between 11.7% and 34.4% in
Nigeria (Morakinyo, 2002). Ohaeri & co-workers (1991) report-
ed 49% at University College Hospital, Ibadan, Nigeria. The
prevalence rates of depression are higher in Nigerians because
of bio-psycho-social factors (Morakinyo, 2002), which included
abject poverty, poor socio-economic factor, lack of social cohe-
sion, numerous stressful life events and high rates of infectious
Based on previous studies, risk factors for depressive illness
in the elderly can be grouped into psychosocial, biological, per-
sonality characteristics, medication and socio-demographic fac-
R. O. SHITTU ET AL.
tors. Psychosocial factors include stressful life events e.g. be-
reavement, financial failures, loneliness etc. (Bruce, 2001). Bi-
ological factors include: female gender, folate and vitamin B12
deficiency, “vascular depression” where stroke is implicated
and chronic or severe physical pain. Personality traits include:
low self esteem, extreme dependency and pessimism. Medica-
tion include: anxiolytics, tranquilizers, anti inflammatory, anti-
infective agents, beta and calcium channel blockers, hormonal
agents, cardio tonic drugs and alcohol. Finally, low socio-eco-
nomic status, poor educational background and widowhood are
socio-demographic factors associated with depression (Mills &
Depression tends to be marked in Africans by somatic symp-
toms, which may explain why it is under-diagnosed or under-
recognized (Ohaeri & Jegede, 1991). Early detection of depres-
sion can be enhanced by screening person for the disorder when
they attend a hospital for other reasons (Edward, 2000). The fa-
mily practice clinic provides an excellent opportunity for this,
as most patients present first at the clinic for all types of illness-
es. Despite the high prevalence of depression, there is a paucity
of data among patients seen in family practice clinics in North-
Central Nigeria in partic ular and West African in gene ral. There-
fore, this study was undertaken to provide data on the effects of
socio-demographic factors on depression among patients at-
tending the General Out-Patients Department (GOPD) of Kwa-
ra State Specialist Hospital Nigeria.
This study was conducted at the General Outpatients Clinic
of Kwara State Specialist Hospital, Ilorin, North Central Nige-
ria. The target populations were the newly registered patients
attending the clinic, which serve as a referral Hospital for Oyo,
Osun and Kogi State of Nigeria.
The sample size was estimated using the Fisher’s Formular
Using 59.6% from a previous study (Afolabi & co-workers,
2008), as the best estimate of depressive disorders among pa-
tient s in a Nigeria Fami ly practice populati on, a minimum sa m-
ple size of 371 was calculated, but 400 was used to increase the
reliability of the study.
A systematic random sampling method was used in recruit-
ing respondents for this study. Thirty new patients were regis-
tered daily, making a total of 210 patients per week and 840 for
the period of study from October 30 to November 30, 2013.
Using a systematic random sampling method, a sampling in-
terval of 4 was obtained (840/210 = 4). Already identified de-
pressed subjects who were on treatment and those who refused
to give consent were excluded from the study. Pretesting was
carried out at the Kwara State Civil Service Hospital, using 40
respondents (10% of the sample size). Ethical approval was ob-
tained from the Ethical Review Committee of the Kwara State
Ministry of Health before commencement of the study. The re-
spondents were adequately informed about the nature of the
study and its benefits. An interviewer administered question-
naire was used.
The Patients Health Questionnaire (PHQ-9) (Krooenke, Spit-
zer, & Williams, 2003) is a bri ef, 9-item, patients self-report de-
pression assessment tool that was derived from the interview-
based PRIME-MD (Spitzer and colleagues, 1994). It was speci-
fically developed for use, in primary care general medical set-
tings. Many depression screening and severity tools have been
used in primary care, with good results. The PHQ-9, however,
offers several advantages to other tools. Because the items and
the scoring of items on the PHQ-9 are identical to the symp-
toms and signs of DSM-4 major depression, the tool is easily
understood with very high face validity for patients and clini-
cians in primary care. Many other instruments use a 1-week
time frame, but the PHQ-9 uses a 2-week time frame, which
conforms to DSM-4 criteria. It is the only tool that was specifi-
cally developed for use as a patient self-administered depres-
sion diagnostic tool, rather than as a severity or screening tool.
It is the only short self-report tool that can reasonably be used
both for diagnosis of DSM-4 major depression as well as for
tracking of severity of major depression over time (Kroenke,
Spitzer, & Williams 2001). Psychometric evaluation of the
PHQ-9 revealed a sensitivity ranging from 62% - 92% and a
specificity between 74% - 88% (Kroenke, 2003; Spitzer, 1994).
All subjects screened positively for depression using Patients
Health Questionna ire—2 (PHQ-2), which was the first t wo ques-
tions of PHQ-9, triggered full diagnostic interviews by the be-
The PHQ-9 was administered to all the respondents, to
screen for depression, until the estimated sample size of 400
was obtained. Respondents who scored one and more were as-
sessed clinically for depression. Scoring and level of depression
was assessed viz: (1-4). Mini mal depression, (5-9) Mild depres-
sion, (10-14) Moderate depression, (15-19). Moderately severe
depression, and (20-27). Severe depression. Some direct de-
pression care, such as care support, coordination, case manage-
ment, and treatment was embarked on.
Completed questionnaire and measurements were entered
into a computer data base. The data were analyzed using the
epidemiological information (Epi-info) 2005 software package
of Center for Disease Control and Prevention (CDC). The 2 by
2 contingency tables were used to carry out Chi-square test and
to find out the level of significance and values less than 0.05
were regarded as statistically significant.
Table 1, displays the socio-demographic characteristics of
the respondents. Females 139 (78.0%) out numbered male 39
(22.0%). Depression was more prominent in the age group 51-
60 years more married than single. Depression was also com-
mon among respondents’ without formal education. Those with
low income or no income constituted the majority of depressed
Figure 1, depicted that 178 (44.5) were depressed. 119 (29.8%)
had minimal depression, 54 (13.5%) mild, 2 (0.5%) moderate
while 3 (0.8%) were severely depressed.
Table 2, shows that there was strong statistical association
between age, sex, marital status, level of education, occupation,
and monthly income, (p -values 0.008, 0.000, 0.000, 0.003, 0. 000
and 0.001 respectively) while religion (p-value 0.541) and eth-
nicity (p-value 0.567) were not significant.
Table 3, shows the clinical evaluation of the patient health
questionnaire-9 (PHQs-9) of the respondents. Fifty respondents
OPEN ACCESS 19
R. O. SHITTU ET AL.
Socio-demographic characteristics of the respondents.
21 - 30 24(13.5)
31 - 40 23(12.9)
41 - 50 47(26.4)
51 - 60 51(26.7)
> 61 33(18.5)
Female 139 (78 .0)
Married 1 02(57 .3)
Non-formal 1 08(60 .7)
Civil servant 27(15.2)
Self employed 73(41.0)
Monthly Income (N)
No Income 28(15.7)
≤20000 129 (72. 5)
20001 - 30000 10(5.6)
30001 - 40000 6(3.4)
40001 - 50000 3(1.7)
Spectrum of de pression of the respon dents.
attested to feeling down, depressed, or hopeless on several days
while 58, had little interest or pleasure in doing things. Seventy
eight had trouble falling or staying asleep, or sleeping too much.
Though none thoughts of hurting self, 43 feel bad or failure to
self an d t o t he family .
In this study one hundred and seventy-eight subjects (44.5%)
were found to have one form of depression or the other. There
was minimal depression in 119 (29.8%), mild in 54 (13.5%),
moderate in 2 (0.5%) and severe depression in 3 (0.8%). This
prevalence was comparable to the 49% reported by Ohaeri &
Jegede at Ibadan, South Western Nigeria in 1991, and also to
the 40% reported by Patel (1998) in Zimbabwe, but lower than
Dolittle & Farrell (2001) who reported a prevalence rate of 62%
in the United States.
Differences between the observed prevalence in this study
and the values cited from the more recent US and Zimbabwe
studies may reflect a variation in local rates of predisposing
factors for depression in the various communities, as had also
been suggested b y (Judd et al., 2002). Probable reasons for these
differences included the effects of a severely depressed national
economy on the psychological state of the subjects. There had
been a general decline in per capital income from $1000 in
1988, the period when Ohaeri & Jegede (1991), conducted their
studies, to $260 in 1998. Nigeria is classified as a low-middle
income country with a Gini Index of 43.7 and income per capi-
tal of $1490 (Okechukwu et al., 2012). There are also wide-
spread and increasing levels of poverty in Nigeria. This is in
consonant with the WHO, who cited poverty as a recognized
factor in the increasing prevalence of depression worldwide
(WHO, 2006; WDR, 2001).
In this study, a significant association existed between de-
pression and low income (p = 0.001). This was comparable to
other studies (Patel, 1999; Kahn, 2000; Araya, 2003). This was
similar to the findings in the province of Ontario, in Canadian
Health Survey, where the highest prevalence of depression
(18.4%), was seen in household, with an income level of less
than $10,000 per year (Offord et al., 1996). Income is the most
significant social determinants of health, because it determines
one’s overall living conditions, affect one’s psychological con-
dition, and help shape one’s diet and eating habits. Low-income
people living in poverty cannot afford healthy food, sufficient
clothing and good housing all of which are necessary precondi-
tions of good health.
Depression was found to be commoner among the subjects
with no formal education. Seventy-one of those without formal
education had minimal depression while 37 presented with mild
level of depression. On the other hand, 16 of those with tertiary
level of education had minimal, 4 had mild while 2 had mod-
erate level of depression. This was statically important (p =
0.003). This findings was in concord with other studies, in
which low level of education was strongly linked with depres-
sion (Okulate, 1999; Barkow, 2003; Shiels, 2004). Education is
a critical social determinants of health because, people with hi-
gher levels of education are often healthier than people with lo-
wer levels of educational attainment.
Moreover, the findings of this study revealed that depression
was more common in the age group 51 - 60 years, with strong
association between age and depression (p = 0.008). This was
in agreement with other studies (Sinha, 1997; Gomez et al.,
R. O. SHITTU ET AL.
Association between socio-demographic variables and depression.
Minimal Depression Mild Depression Moderate Depression Severe Depression Chi-square
21 - 30 15 6 2 1 24 0.008
31 - 40 13 8 0 2 23
41 - 50 36 11 0 0 47
51 - 60 31 20 0 0 51
>=61 24 9 0 0 33
Total 119 54 2 3 178
Male 33 3 0 3 39 0.000
Female 86 51 2 0
Total 119 54 2 3 178
Hausa 116 51 2 3 172 0.567
Igbo 0 2 0 0 2
Total 119 54 2 3 178
Christianity 21 6 0 0 27 0.541
Islam 98 48 2 3 151
Total 119 54 2 3 178
Single 7 2 0 3 12
Divorced 5 1 0 0 6
Separated 6 6 0 0 12
Widow 28 18 0 0 46
Total 119 54 2 3 178
LEVEL OF EDUCATION
Non - formal 71 37 0 0 108 0.003
Primary 16 6 0 0
Secondary 16 7 0 2 25
Total 119 54 2 3 178
Civil servant 19 4 2 2 27
Self employed 45 28 0 0
Unemployed 15 4 0 0 19
Total 119 54 2 3 178
Monthly Income (N)
≤20000 79 50 0 0 129
20001 - 30000
30001 - 40000 5 1 0 0 6
40001 - 50000
>50000 1 0 0 1 3
Total 119 54 2 3 178
OPEN ACCESS 21
R. O. SHITTU ET AL.
The patient health questionnaire -9 (PHQ-9)12-14.
Over the las t 2 weeks, how often have you been bothered
by any of the following problems? Not at all Sever al days More than half the days Nearly every day Total
1. Little interest or pleasure in doing thing s 338 58 4 0 400
2. Feeling d own, depressed, or hopeless 330 50 18 2 400
3. Trouble falling or staying asleep, or sleeping too much 288 78 27 7 400
4. Feeling tired or havi ng l ittle energy 279 85 33 3 400
5. Poor appetite or overeating 3 29 51 17 3 400
6. Feeling ba d about your s elf-or that you are a failure or
have let yo urs elf or your family down 3 51 43 3 3 400
7. Trouble concentrating on things, such as rea di ng the
newspaper or watching television 367 30 3 0 400
8. Moving or speaking so slow l y that other people could have
noticed, or the opposite-being so fidgety or restless that
you have been moving around a lot more tha n us ual 392 5 3 0 400
9. Thoughts t hat you woul d be better off dead, or of hurt i ng
yourself in some way. 397 0 3 0 4 00
2004). Gomez-Restrepo et al. (2004) reported a higher preva-
lence of depression in person older than 45 years. Similarly, de-
pression symptoms was reported to be twice in the older age
group than in younger adults in Butajira, Ethiopia (Kebede et
al., 2003). This was contrary to the finding of Noori and co-work-
ers, who reported highest prevalence range in the age group of
20 to 24 years and the lowest rate in the age group of 75 years
and above. Plausible reason for this could be biological because
of hormonal variation in menopause and andropause. It could
also be as a result of stressful life events like bereavement, fi-
nancial failures and loneliness (Bruce, 2001; Mills, 2001). Con-
trary to the above, a study in Nigeria (Ihezue & Kumaraswany,
1986) found out that there was no significant association be-
tween depression and age, which was similar to a Harvard Me-
dial School study reported that, depression could occur at any
age, and that individual, might experience depression at differ-
ent times of their lives for different reasons (President and Fel-
lows of Harvard College, 2007), hence, there were no signifi-
cant differences between age group and depression.
Occupation status was found to have a significant relation-
ship with depression in this study. (p = 0.000), with 15(8.4%)
of the unemployed having minimal depression while 4(2.2) had
mild depression. This was in support of other studies that found
a significant association between employment status and de-
pression (Prause, 2001; Comino, 2000; Roos, 2005). This was
similar to another study, where depressive features were more
common among the unemployed. Depression resulting from
unemployment had increased over the years (President and
Fellows of Harvard College, 2007), but contrary to the study of
Afolabi and colleagues (2008) who found no association be-
tween employment and depression. Unemployment leads to
poor physical mental health in a number of ways. When pa-
tients become unemployed, it is a stressful event that affects
their self-esteems. Since employment generates income, a posi-
tive identity and the ability to live healthy lifestyles, unem-
ployment leads to impoverishment, psychological stress and
participate in health-threatening coping behaviours such as to-
bacco consumption, alcohol abuse, promiscuity.
Furthermore, in this study, marital status had a negative sig-
nificant association with depression (p = 0.000). This was in
support of the findings of Brown et al. who established that ma-
rital status had no bearing on the experience of depression
(Brown & co-workers, 2000), but contrary to the findings of
Afolabi and colleagues (2008) at Obafemi Awolowo Teaching
Hospital Complex (OAUTHC), in Ile-Ife, Nig eria, West A fric a;
were marriage was indeed extremely beneficial.
There was significant association between depression and
gender in this study (p = 0.008). One hundred and thirty-nine
females (78%) had depression, compared to 39 males (22%).
This was contrary to the study of Afolabi and colleagues (2008).
Women were more likely to experience depression than men
because they carry the double burden of raising children and
household work. Gender inequity needs to be regarded as a
social determinant of depression. Thus there is a need to pay
more attention to gender as determinants of depressive mood.
The proportion of patients with depressive symptoms in fam-
ily practice clinics is high and highly correlates with socio-de-
mographic factors and low socio-economic status. Coping me-
chanism for depression in resource-limited economies, like
those of most West African countries, is an important area that
needs to be studied further. Increased awareness, information,
advocacy and access to healthcare services, especially for the
early detection and preventive care of depression, are of c ritical
importance. The family as a focus for health promotion will re-
quire the development of practical approaches that employ so-
cial variables in the analysis of health and human development
strategies, and the recognition of the power of these social va-
riables in the analysis of health and human development strate-
gies, and the recognition of the power of these social variables
in influencing mental health.
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