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Table 1 Baseline characteristics of the study population and first hospitalization for dementia

From: Long-term exposure to air pollution and hospitalization for dementia in the Rome longitudinal study

Characteristics

Population

First hospitalization for dementia

N

%

N

%

SHRa (10,000 P-Y)

Total

350,844

100

21,548

100

88

Age class

 65–69

110,334

31.5

3214

14.9

 

 70–74

95,602

27.3

5367

24.9

 

 75–79

73,421

20.9

6332

29.4

 

 80–84

38,620

11.0

3883

18.0

 

 85–89

23,299

6.6

2116

9.8

 

 90+

9568

2.7

636

3.0

 

Age mean (SD)

74.5 (6.8)

77.1 (6.5)

Gender

 Men

145,944

41.6

7916

36.7

85

 Women

204,900

58.4

13,632

63.3

90

Place of Birth b

 Rome

114,112

32.5

6685

31.0

92

 Other

236,732

67.5

14,863

69.0

87

Marital Status

 Married

202,004

57.6

10,787

50.1

83

 Single

24,626

7.0

1585

7.4

91

 Separated

12,043

3.4

642

3.0

97

 Widowed

112,171

32.0

8534

39.6

98

Education b

 Primary School or less

178,062

50.8

12,423

57.7

100

 Junior high School

72,823

20.8

4146

19.2

85

 High School

60,861

17.4

3044

14.1

69

 University

39,098

11.1

1935

9.0

72

Area-based SEPc

 Very High

75,772

21.6

4271

19.8

78

 High

75,595

21.6

4556

21.1

84

 Medium

72,325

20.6

4459

20.7

89

 Low

68,080

19.4

4321

20.1

96

 Very Low

59,072

16.8

3941

18.3

101

CVD prevalent

Yes

89,054

25.4

6650

30,9

113

No

261,790

74.6

14,898

69,1

80

Stroke prevalent

 Yes

6560

1.9

638

3.0

168

 No

344,284

98.1

20,910

97.0

87

COPD

 Yes

19,472

94.5

1402

6.5

123

 No

331,372

5.6

20,146

93.5

87

Brain injury

 Yes

2257

0.6

194

0.9

121

 No

348,587

99.4

21,354

99.1

88

Distance to HTR (m)

  < 50

67,515

19.2

4270

19.8

90

 50–100

53,729

15.3

3286

15.3

87

 101–200

98,262

28.0

6066

28.2

88

 201–300

56,292

16.0

3445

16.0

87

  > 300

75,046

21.4

4481

20.8

88

  1. a SHR Standardized hospitalization rate, standardized by sex and age (age groups: 65–69; 70–74; 75–79; 80–84; 85–89; 90+) considering Italian residents in 2008 as standard population (source:www.demo.istat.it)
  2. b Information at 2001 census of the population
  3. c SEP Socioeconomic position; Information at baseline residence