Table 1.
Age-specific baseline characteristics of the study sample of GP patients for the total sample, and the age groups of 75 to 79 years, 80 to 84 years and 85+ years (N=2,436).
| Characteristics at baseline | Total sample n=2,436 |
75-79 years n=1,339 |
80-84 years n=901 |
85+ years n=196 |
Test statistics |
p value |
|---|---|---|---|---|---|---|
| Sex, n (%) | ||||||
| Female | 1,551 (63.7) | 814 (60.8) | 606 (67.3) | 131 (66.8) | χ2 = 10.7 | <.01 |
| Male | 885 (36.3) | 525 (39.2) | 295 (32.7) | 65 (33.2) | ||
| Marital status, n (%) | ||||||
| Single/divorced | 278 (11.4) | 143 (10.7) | 108 (12.0) | 27 (13.8) | χ2 = 95.7 | <.001 |
| Married | 1,070 (43.9) | 697 (52.0) | 329 (36.5) | 44 (22.5) | ||
| Widowed | 1,088 (44.7) | 499 (37.3) | 464 (51.5) | 125 (63.8) | ||
| Living situation, n (%) | ||||||
| Not alone | 1,213 (49.8) | 751 (56.1) | 396 (44.0) | 66 (33.7) | χ2 = 53.9 | <.001 |
| Alone | 1,223 (50.2) | 588 (43.9) | 505 (56.0) | 130 (66.3) | ||
| Level of education1, n (%) | ||||||
| Low | 1,476 (60.6) | 831 (62.1) | 541 (60.1) | 104 (53.1) | χ2 = 18.4 | <.01 |
| Middle | 672 (27.6) | 346 (25.8) | 248 (27.5) | 78 (39.8 | ||
| High | 288 (11.8) | 162 (12.1) | 112 (12.4) | 14 (7.14) | ||
| MMSE score, mean (s.d.) | ||||||
| 27.7 (1.7) | 27.8 (1.7) | 27.5 (1.8) | 27.1 (1.8) | χ2 = 36.8 | <.001 | |
| SCD, n (%) | ||||||
| No | 1,046 (42.9) | 582 (43.5) | 390 (43.3) | 74 (37.8) | χ2 = 3.1 | .537 |
| Yes, but without related worries | 1,046 (42.9) | 564 (42.1) | 387 (43.0) | 95 (48.5) | ||
| Yes, with related worries | 344 (14.1) | 193 (14.4) | 124 (13.8) | 27 (13.8) | ||
| Instrumental ADL, Impaired, n (%) | ||||||
| 233 (9.6) | 102 (7.6) | 96 (10.7) | 35 (17.9) | χ2 = 22.7 | <.001 | |
| Vision impairment, Impaired, n (%) | ||||||
| 316 (13.0) | 131 (9.8) | 145 (16.1) | 40 (20.4) | χ2 = 29.4 | <.001 | |
| Hearing impairment, Impaired, n (%) | ||||||
| 710 (29.2) | 321 (24.0) | 314 (34.9) | 75 (38.3) | χ2 = 39.4 | <.001 | |
| Mobility impairment, Impaired, n (%) | ||||||
| 780 (32.0) | 336 (25.1) | 356 (39.5) | 88 (44.9) | χ2 = 67.7 | <.001 | |
| Smoking, n (%) | ||||||
| Never | 1,485 (61.0) | 775 (57.9) | 580 (64.4) | 130 (66.3) | χ2 = 13.4 | <.05 |
| Former | 775 (31.8) | 453 (33.8) | 267 (29.6) | 55 (28.1) | ||
| Current | 176 (7.2) | 111 (8.3) | 54 (6.0) | 11 (5.6) | ||
| Risky alcohol consumption, n (%) | ||||||
| 344 (14.1) | 205 (15.3) | 117 (13.0) | 22 (11.2) | χ2 = 3.9 | .144 | |
| Comorbidity, n (%) | ||||||
| No diagnosis | 351 (14.4) | 205 (15.3) | 124 (13.8) | 22 (11.2) | χ2 = 5.49 | .240 |
| 1-4 diagnoses | 1,888 (77.5) | 1,036 (77.4) | 693 (76.9) | 159 (81.1) | ||
| 5+ diagnoses | 197 (8.1) | 99 (7.3) | 84 (9.3) | 15 (7.7) | ||
| APOE ϵ4 allele, n (%) | ||||||
| 498 (20.4) | 280 (20.9) | 187 (20.8) | 31 (15.8) | χ2 = 2.81 | .245 | |
1Based on the revised version of the international CASMIN educational classification (Brauns and Steinmann, 1999), ADL, activities of daily living; MMSE, Mini Mental Status Examination; SCD, subjective cognitive decline; s.d., standard deviation; sHR, subdistribution hazard ratios. Significant results are displayed in bold fonts.