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Table 2 Study demographics

From: Oral health knowledge, attitudes, and practices of people living with mental illness: a mixed-methods systematic review

Author, year of publication

Country

Methodology/

Method

Sample size/

Setting

Sample characteristics

Age

Gender

Diagnosis and percentage of participants

Adams et al., 2018 [34]

UK

Quantitative/ randomised controlled trial

n = 1095

Community

18 and over

M = 66.3% (726), F = 33.7% (369)

Psychotic illness

Agarwal et al., 2021 [35]

India

Quantitative/ cross-sectional

n = 111

Community

15–60

M = 75% 83, F = 25%28

Schizophrenia

Alkan et al., 2015 [48]

Turkey

Quantitative/ cross-sectional

n = 364

Community

18–65

M = 46.4% (169), F = 53.6% (195)

Anxiety, Depression and Attention Deficit Hyperactive Disorder

Almomani et al., 2009 [28]

USA

Quantitative

n = 60

Community

22–62

M = 45% (27), F = 55% (33)

Schizophrenia = 57.1%

Schizoaffective = 5.3%

Bipolar Affective Disorder = 12.5%

Depression = 32.1%

Anita et al., 2019 [49]

India

Quantitative/ cross-sectional

n = 304

Community

18–71

M = 52.3% (159), F = 47.7% (145)

Schizophrenia M = 36%, F = 21%,

Mood disorder M = 7%, F = 46%,

Organic brain damage M = 34%, F = 14%,

Other M = 23%, F = 19%

Bertaud-Gounot et al., 2013 [50]

France

Quantitative/ cross-sectional

n = 161

In-patient

18–90

M = 59% (95), F = 41% (66)

Schizophrenia = 36.6%

Mood disorders = 21.1%,

Mental disorders due to psychoactive substance use = 12.4%

Organic = 8.1%

Mental retardation = 7.5%

Neurotic, stress related and somatoform disorders = 3.7%,

Disorders of psychological development = 3.7%

Personality disorders = 2.5%

Behavioural and emotional disorders onset in childhood and adolescents = 1.2%

Bjorkvik et al., 2021 [40]

Norway

Qualitative/ semi-structured interviews

n = 51

Community

22–78

M = 35% (18), F = 65% (33)

Anxiety disorders = 70.6%

Mood disorders = 66.7%

Psychosis in Bipolar disorder = 34.4%

Severe traumatic experiences = 54.9%

Cognitive disabilities = 29.4%

Severe somatic illness = 47.1%

Gurbuz 2011 [55]

Istanbul, Turkey

Quantitative/ cross-sectional

n = 330

In-patient

22–82

M = 54.2% (179), F = 35.8% (151)

Schizophrenia = 61.8%

Mental retardation = 30.6%

Organic mental disorder = 3.3%

Atypical psychosis = 4.2%

Hall et al., 2018 [45]

USA

Quantitative/ cross-sectional

n = 186

Community

18–83

M = 31.7% (59), F = 68.3% (127)

Schizophrenia = 30.7%

BPAD = 23.1%

Depression = 17.2%

PTSD = 14.0%

Anxiety = 7.5%

ADHD = 4.3%

Other = 1.6%

prefer not to answer = 1.3%

Hede, et al., 1992 [30]

Denmark

Quantitative/ cross-sectional

n = 84

In-patient

20–64

M = 35.7% (30), F = 64.3% (54)

Schizophrenia = 51%

Manic-depression 10%

Reactive psychosis = 25%

Other = 14%

Hede, B. 1995 [36]

Denmark

Quantitative/ cross-sectional

n = 240

Community

20–64

M = 60% (144), F = 40% (96)

Schizophrenia = 33%

Mood disorders = 30%

Anxiety disorders = 21%

Other = 16%

Ho et al., 2018 [42]

Australia

Qualitative/ focus-groups and semi-structured interviews

n = 12

Community

18 and over

M = 33.3% (4), F = 66.6% (8)

Not reported

Janardhanan et al., 2011 [59]

USA

Quantitative/ cross-sectional comparison

n = 311

Community

55 + 

M = 32.8% (102), F = 67.2% (209)

Schizophrenia

Kebede et al., 2012 [54]

Ethiopia

Quantitative/ cross-sectional

n = 240

In-patient

15–68

M = 70% (168), F = 30% (72)

Depression = 65.8%

psychotic disorder = 17.5%

anxiety disorder = 8.3%

2.1% = epilepsy

bipolar disorder = 1.7%

other = 4.6%

Khokhar, et al., 2011 [32]

UK

Quantitative/ pre-post test

n = 59

In-patient

22–76

M = 67.8% (40), F = 32.2% (19)

Not reported

Kuipers et al., 2018 [41]

Netherlands

Qualitative/ open-ended interviews

n = 30

Community

18–35

M = 60% (18), F = 40% (12)

First episode psychosis

Kuipers et al., 2022 [58]

Netherlands

Quantitative/ case–control

n = 81

Community

18–35

Case group: M = 52, F = ,29 Control group M = 107, F = 59

First episode psychosis

Kuo et al., 2020 [29]

Taiwan

Quantitative/ Randomised controlled trial

n = 58

In-patient

20 and over

NR

Schizophrenia = 87.9%,

Mood disorder = 1%

Organic mental illness = 4%

Other = 2%

Lalloo et al., 2013 [51]

Australia

Quantitative/ cross-sectional

n = 50

Community

20–83

M = 80% (40), F = 20% (10)

Schizophrenia and other non-affective psychoses = 76%, Schizoaffective = 18%

Bipolar Affective Disorder = 2%

Lopes et al., 2021 [52]

Brazil

Quantitative/ cross-sectional

n = 753

Community

NR

M = 48.6% (366), F = 51.4% (387)

Schizophrenia, depression

McKibbin et al., 2015 [24]

USA

Qualitative/semi-structured interviews

n = 25

Community

35–63

M = 52% (13), F = 48% (12)

Bipolar Affective Disorder = 52%

Schizophrenia = 28%

Schizoaffective disorder = 16%

Major depression =  < 1%

Mishu et al., 2022 [39]

UK

Qualitative/ interviews

n = 7

Community

31- > 60

M = 43% (3), F = 57% (4)

Schizophrenia = 57%

Bipolar disorder = 43%

Nayak et al., 2020 [53]

India

Quantitative/ cross-sectional

Community

21–70

NR

Depression, schizophrenia, mood disorder, mania

Ngo et al., 2018 [37]

Singapore

Quantitative/ cross-sectional

n = 191

In-patient

24–80

M = 74.9% (143), F = 25.1% (48)

Schizophrenia = 88.5%

Intellectual disability = 4.7%

Other = 6.8%

Nielsen et al., 2011 [60]

Denmark

Quantitative/

prospective database study

n = 21,417

Community/

inpatient

18 and over

M = 59%, F = 41%

Schizophrenia

Persson et al., 2009 [46]

Sweden

Quantitative/ cross-sectional

n = 113

Community

21–64

M = 40.7% (46), F = 59.3% (67)

Schizophrenia = 33%

Mood disorders = 30%

Anxiety disorders = 21%

Other = 16%

Persson et al., 2010 [22]

Sweden

Qualitative/ longitudinal intervention

n = 10

Community- supported housing

NR

M = 30% (3), F = 70% (7)

Schizophrenia

Sogi 2020 [38]

Haryana, India

Quantitative/ cross-sectional

n = 165

Community

18–70

M = 58.8% (97), F = 41.2% (68)

Mood disorder = 30.9%

Neurotic, stress-related and somatoform disorder = 30.9

Mental and behavioural disorders due to psychoactive substance use = 22.4%

Schizophrenia, schizotypal and delusional disorder = 11.5%,

Epilepsy = 4.3%

Stevens et al., 2010 [33]

UK

Quantitative/ pre-post test

N = 65

In-patient

NR

NR

Not reported

Tani et al., 2012 [56]

Japan

Quantitative/ cross-sectional

n = 523

In-patient

18–87

M = 56.8% (297), F = 43.2% (226)

Schizophrenia = 97.7%

Schizoaffective disorder- 0.95%

Delusional disorder = 1.14%

Acute and transient psychotic disorder = 0.19%

Teng et al., 2011 [31]

Taiwan

Quantitative/ cross-sectional

n = 200

In-patient

NR

M = 62.5% (125), F = 37.5% (75)

Schizophrenia = 61%,

Bipolar Affective Disorder = 14.5%

Major depressive disorder = 11.5%

Organic mental disorder = 11%

Other = 2%

Tredget et al., 2019 [57]

Wales

Quantitative/ cross-sectional

Community

20–82

M = 64.2%, F = 35.8%

Schizophrenia

Villadsen et al., 2017 [43]

Denmark

Qualitative/ open interviews

n = 23

Community

21–58

M = 47.9% (11), F = 52.1% (12)

Schizophrenia

Waplington et al., 2000 [47]

UK

Mixed/Semi-structured interviews

n = 70

Community

NR

M = 55.7% (39), F = 44.3% (31)

Not reported

Wright et al., 2021 [44]

USA

Qualitative/ interviews

n = 20

Community

21–63

M = 40% (8), F = 60% (12)

Schizophrenia, Bipolar disorder, Schizoaffective disorder, Major depressive disorder = 70%

Borderline personality disorder, post-traumatic disorder, anxiety disorder, attention-deficit hyperactive disorder = 30%

Yoshii et al., 2017 [61]

Japan

Quantitative/ pre-post test

n = 323

Community- Day center

NR

M = 62.5% (202), F = 37.5% (121)

Schizophrenia = 64.4%

Mood disorders = 23.2%

other = 6.5%

unknown = 5.9%