Skip to main content

Table 5 Cluster Analysis for Fruit Intake, Vegetable Intake, Smoking and Physical Activity in Survey of High Impact Psychosis Participants and Associated Demographic Profiles

From: Cardiovascular disease lifestyle risk factors in people with psychosis: a cross-sectional study

Variables used for Cluster Formation

 

Cluster 1 n = 401 (22% of SHIP cohort) (N %) (poorest lifestyle behaviours)*

Cluster 2 n = 771 (42% of SHIP cohort) (N %) (mixture of poor and healthy lifestyle behaviours)*

Cluster 3 n = 653 (36% of SHIP cohort) (N %) (healthiest lifestyle behaviours)*

Statistical Test

Fruit consumed (no of serves per day in the last 4 weeks)

Met recommendations (≥2–3 serves/ day)

–

2.2

78.3

x2 (4) = 1288.69,

p < 0.001****

Did not meet recommendations (≤1 serve/ day)

100

97.8

21.7

Vegetables consumed (no of serves per day in the last 4 weeks)

Met recommendations (≥4–5 serves/day)

–

2.2

31.5

x2 (4) = 436.39,

p < 0.001****

Did not meet recommendations (≤0–3 serves/day)

100

97.8

68.5

Smoking- Fagerstrom test for nicotine dependence

Does not smoke

–

46.8

45.9

x2 (8) = 1257.55,

p < 0.001****

Low dependence

–

6.4

3.8

Low to moderate dependence

–

16.1

9.6

Moderate dependence

100

0.5

26.2

High dependence

–

30.2

14.4

Time in min spent engaging in vigorous physical activity/ week

 

22.5 (80.2)a

29.0 (85.2)b

107.3 (297.3)c

(F (2, 994.5) = 23.4,

p < 0.001****)

GH

a vs bp = 0.355

b vs c p < 0.001****

a vs c p < 0.001****

Time in min spent engaging in moderate physical activity/ week

 

52 (135.2)a

37.1 (91.4)b

136.6 (368.3)c

(F (2, 833.3) = 24.1,

p < 0.001****)

GH

a vs bp = 0.088

b vs c p < 0.001****

a vs c p < 0.001****

Demographics Characteristics of Clusters

Sex

Males

66.1

60.3

54.7

x2 (2) =13.75,

p = 0.001***

Females

33.9

 

45.3

Age

 

36.77 (10.5)a

38.46 (11.5)b

39.23 (11.1)c

(F (2, 1798) = 5.9,

p = 0.003***)

T-HSD

a vs b p = 0.019**

b vs cp = 0.160

a vs c p = 0.001***

Marital status

Single/ Never Married

66.3

59.7

59.9

x2 (6) = 7.35,

p = 0.289

Married/ De facto

15.2

18.0

17.2

Separated/ Divorced

17.7

21.4

21.4

Widowed

0.7

0.9

1.5

Highest qualification obtained

Left school no qualifications

37.7

34.0

30.9

x2 (12) = 27.02,

p = 0.008***

Secondary school qualification/leaving certificate

17.7

15.2

17.8

Tertiary Certificate

39.2

39.6

42.4

Bachelor’s Degree

3.0

6.7

4.3

Postgraduate Qualifications

0.5

1.3

2.5

Other

1.5

2.3

1.2

Diagnosis

Schizophrenia

48.9

47.9

44.7

x2 (30) = 30.66,

p = 0.432

Schizoaffective

17.2

14.6

17.1

Bipolar, mania

15.7

15.7

19.8

Depressive psychosis

3.5

5.4

3.8

Delusional disorders and other non-organic psychosis

1.2

5.1

4.5

Severe depression disorder

5.9

1.4

1.8

Screen-positive for psychosis but did not meet full criteria for ICD-10 psychosis

1.5

1.3

1.4

Government pension, allowance or benefit as the main source of income

No

9.7

12.7

17.9

x2 (2) = 15.953,

p < 0.001****

Yes

89.8

86.1

80.7

  1. *clusters names are attributed to the most pronounced health behaviour characteristics in each cluster;** p < 0.05; ***p < 0.01; ****p < 0.001; SHIP- Survey of High Impact Psychosis; x2-Chi Square test; F- ANOVA- One-Way Analysis of Variance or Welch ANOVA; T-HSD- Tukey’s honestly significant difference post hoc analysis; GH- Games-Howell- post hoc analysis