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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)