Table 1 Sample characteristics

Age

40.88

14.70

37.44

11.29

34.22

12.78

36.57

14.64

54.73

9.85

Gender

 Male

560

52

136

48.7

141

50.7

109

45.2

174

62.6

 Female

516

48

143

51.3

137

49.3

132

54.8

104

37.4

Ethnicity

 Chinese

722

67.1

197

70.6

187

67.3

181

75.1

157

56.5

 Malay

149

13.8

41

14.7

46

16.5

25

10.4

37

13.3

 Indian

144

13.4

30

10.8

24

8.6

20

8.3

70

25.2

 Other

61

5.7

11

3.9

21

7.6

15

6.2

14

5

Education

 Primary

47

4.4

16

5.7

13

4.7

2

0.8

16

5.8

 Secondary

260

24.2

77

27.6

40

14.4

36

14.9

107

38.5

 Tertiary

476

44.2

135

48.4

129

46.4

122

50.6

90

32.4

 University

291

27

51

18.3

94

33.8

81

33.6

65

23.4

Marital status

 Married

607

56.4

225

80.6

185

66.5

159

66

38

13.7

 Unmarried

469

43.6

54

19.4

93

33.5

82

34

240

86.3

Employment status

 Employed

651

60.5

135

48.4

171

61.5

143

59.3

202

72.7

 Unemployed

261

24.3

120

43

64

23

55

22.8

22

7.9

 Economically inactive

160

14.9

24

8.6

43

15.5

43

17.8

50

18

Presence of co-morbidity

 Physical co-morbidity

526

48.9

114

40.9

89

32

59

24.5

264

95

 Psychiatric co-morbidity

290

27

73

26.2

103

37.1

108

44.8

6

2.2

Class

 Class 1 - Extensive difficulty

108

10

34

12.2

36

13

25

10.4

13

4.7

 Class 2 - Cognitive and social difficulty

147

13.7

32

11.5

64

23

45

18.7

6

2.2

 Class 3 - Physical difficulty

140

13

58

20.8

16

5.8

15

6.2

51

18.4

 Class 4 - Emotional difficulty

255

23.7

37

13.3

114

41

98

40.7

6

2.2

 Class 5 - No difficulty

426

39.6

118

42.3

48

17.3

58

24.1

202

72.7