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Table 1 Baseline characteristics of all participants

From: Construction of a risk prediction model for Alzheimer’s disease in the elderly population

Characteristics

Participants (n = 1099)

With AD (n = 555)

Without AD (n = 544)

Training set (n = 824)

Validation set (n = 275)

P-value

Age (year)

66.85 ± 4.07

67.06 ± 4.23

66.62 ± 3.88

66.82 ± 4.01

66.94 ± 4.23

0.047

Sex, n (%)

0.039

 Male

711 (64.70)

362 (65.23)

349 (64.15)

543 (65.9)

168 (61.09)

 

 Female

388 (35.30)

193 (34.77)

195 (35.85)

281 (34.1)

107 (38.91)

 

BMI (kg/m2)

23.14 ± 2.84

23.19 ± 2.91

23.15 ± 2.65

23.17 ± 2.86

23.06 ± 2.78

0.605

Marital status, n (%)

0.302

 1

360 (32.76)

179 (32.25)

181 (33.27)

266 (32.28)

94 (34.18)

 

 2

349 (31.76)

166 (29.91)

183 (33.64)

264 (32.04)

85 (30.91)

 

 3

390 (35.49)

210 (37.84)

180 (33.09)

294 (35.68)

96 (34.91)

 

Education level, n (%)

0.051

 1

454 (41.31)

257 (46.31)

197 (36.21)

340 (41.26)

114 (41.45)

 

 2

205 (18.65)

64 (11.53)

141 (25.92)

153 (18.57)

52 (18.91)

 

 3

440 (40.04)

234 (42.16)

206 (37.87)

331 (40.17)

109 (39.64)

 

Economic status, n (%)

< 0.001

 1

336 (30.57)

209 (37.66)

127 (23.35)

253 (30.7)

83 (30.18)

 

 2

203 (18.47)

97 (17.48)

106 (19.49)

152 (18.45)

51 (18.55)

 

 3

172 (15.65)

79 (14.23)

93 (17.1)

133 (16.14)

39 (14.18)

 

 4

160 (14.56)

67 (12.07)

93 (17.1)

117 (14.2)

43 (15.64)

 

 5

228 (20.75)

103 (18.56)

125 (22.98)

169 (20.51)

59 (21.45)

 

Lifestyle, n (%)

0.038

 1

359 (32.67)

193 (34.77)

166 (30.51)

266 (32.28)

93 (33.82)

 

 2

349 (31.76)

166 (29.91)

183 (33.64)

264 (32.04)

85 (30.91)

 

 3

153 (13.92)

78 (14.05)

75 (13.79)

114 (13.83)

39 (14.18)

 

 4

146 (13.28)

86 (15.5)

60 (11.03)

112 (13.59)

34 (12.36)

 

 5

92 (8.37)

32 (5.77)

60 (11.03)

68 (8.25)

24 (8.73)

 

Health status, n (%)

0.025

 1

294 (26.75)

163 (29.37)

131 (24.08)

216 (26.21)

78 (28.36)

 

 2

258 (23.48)

131 (23.6)

127 (23.35)

193 (23.42)

65 (23.64)

 

 3

213 (19.38)

107 (19.28)

106 (19.49)

158 (19.17)

55 (20)

 

 4

188 (17.11)

91 (16.4)

97 (17.83)

145 (17.6)

43 (15.64)

 

 5

146 (13.28)

63 (11.35)

83 (15.26)

112 (13.59)

34 (12.36)

 

Genetic risk, n (%)

0.019

 1

151 (13.74)

77 (13.87)

74 (13.6)

117 (14.2)

34 (12.36)

 

 2

482 (43.86)

220 (39.64)

262 (48.16)

362 (43.93)

120 (43.64)

 

 3

466 (42.40)

258 (46.49)

208 (38.24)

345 (41.87)

121 (44)