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Table 2 Prevalence, incidence, fall free survival and risk estimates of prospectively reported falls during follow-up year

From: Falls in advanced old age: recalled falls and prospective follow-up of over-90-year-olds in the Cambridge City over-75s Cohort study

Study participant characteristics

Prevalence:

How common is falling or repeated falling

>90 years?

Incidence:

How frequently do

>90-year-olds fall?

Fall free survival:

How long till a fall?

 

n

Reported

≥ 1 fall in

follow/up

n (%)

Relative Risk

– unadjusted

RR (95% C.I.)

Reported

≥ 2 falls in

follow/up

n (%)

Relative Risk

– unadjusted

RR (95% C.I.)

N° of

f/up

falls

P-yrs

of

f/up

F/up

falls

/p-yr

Incidence

Rate Ratio

– unadjusted

IRR (95% C.I.)

Time to

1st fall

Mean (SD)

Hazard Ratio

-unadjusted

HR (95% C.I.)

AGE

           

Each additional year > 91 years

 

-

1.0 (1.0–1.1)

-

1.1 (1.0–1.2)

-

-

-

1.04 (1.0–1.2)

 

-

AGE-BAND

           

91–94 years old

74

43 (58)

1.0

31 (42)

1.0

174

68.2

2.6

1.0

130(89)

1.0

≥ 95 years old

36

23 (64)

1.1 (0.8–1.4)

18 (50)

1.2 (0.7–1.7)

91

27.5

3.3

1.5 (0.7–3.1)

75(66)

1.6 (0.9–2.6)

GENDER

           

Men

20

10 (50)

1.0

7 (35)

1.0

54

17.2

3.1

1.0

108(92)

1.0

Women

90

56 (62)

1.3 (0.8–1.6)

42 (47)

1.3 (0.7–2.0)

211

78.5

2.7

0.8 (0.3–2.3)

111(85)

1.3 (0.7–2.6)

PLACE OF RESIDENCE

           

Living in the community

(house, flat or granny flat)

62

35 (57)

1.0

25 (40)

1.0

138

56.1

2.5

1.0

116(96)

1.0

Living in any supported setting

(Sheltered housing or institution)

48

31 (65)

1.1 (0.8–1.4)

24 (50)

1.3 (0.8–1.7)

127

39.7

3.2

1.4 (0.8–2.4)

104(73)

1.3 (0.8–2.1)

EDUCATION

           

Left school aged 14 yrs or less

67

38 (57)

1.0

26 (39)

1.0

118

57.1

2.1

1.0

126(95)

1.0

Full-time education aged 15+ yrs

43

28 (65)

1.1 (0.8–1.4)

23 (54)

1.4 (0.9–1.8)

147

38.6

3.8

1.8 (0.9–3.7)

89(66)

1.4 (0.8–2.2)

SOCIAL CLASS

           

Manual

55

34 (62)

1.0

21 (38)

1.0

95

46.5

2.0

1.0

120(86)

1.0

Non-manual

51

30 (59)

1.0 (0.6–1.2)

27 (53)

1.4 (0.9–1.9)

163

46.2

3.5

1.9 (1.0–3.6)

103(87)

0.9 (0.5–1.5)

FALL HISTORY

           

Not fallen in year before interview

46

23 (50)

1.0

14 (30)

1.0

47

40.8

1.2

1.0

132(92)

1.0

Fallen at least once in past year

63

42 (67)

1.3 (0.9–1.6)

34 (54)

1.8 (1.1–2.4)

216

54.6

4.0

3.6 (2.0–6.3)

101(81)

1.7 (1.0–2.8)

Fallen only once or not past year

72

32 (44)

1.0

21 (29)

1.0

80

62.4

1.3

1.0

137(89)

1.0

Fallen > once in past year

37

33 (89)

2.0 (1.6–2.2)

27 (73)

2.5 (1.8–3.0)

183

33.0

5.6

4.7 (2.6–8.7)

88(75)

3.5 (2.1–5.7)

TOTAL SAMPLE

110

66 (60)

 

49 (45)

 

265

95.7

2.8

 

111(85)

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