Table 1.
Descriptive characteristics of Cambridge City over 75 Cohort study participants
| Interview wave | |||||||
|---|---|---|---|---|---|---|---|
| Mean (SD) (range) | First (n = 2078) | Second (n = 1141) | Third (n = 640) | Fourth (n = 379) | Fifth (n = 166) | Sixth (n = 76) | Seventh (n = 15) |
| MMSE | 25.4 (4.5) [0, 30] | 24.3 (4.3) [0, 30] | 22.7 (5.8) [0, 30] | 22.0 (6.6) [0, 30] | 21.4 (6.0) [5, 30] | 18.9 (7.2) [0, 30] | 16.3 (7.4) [0, 27] |
| Years to death | 7.2 (5.0) [0.04, 22.2] | 6.6 (4.5) [0.01,19.7] | 5.3 (3.7) [0.01, 15.7] | 4.5 (3.0) [0.1, 12.7] | 3.5 (2.3) [0.1, 9.3] | 2.2 (1.5) [0.05, 5.6] | 0.8 (0.5) [0.1, 2] |
| Time between death and last interview (years) | 3.5 (3.3) [0.01, 19.7] | 2.7 (2.5) [0.01,19.5] | 2.3 (1.9) [0.01, 15.6] | 2.4 (1.8) [0.01, 10.3] | 2.1 (1.4) [0.05, 8.4] | 1.5 (1.2) [0.01, 4.6] | 0.8 (0.5) [0.01, 1.9] |
| Women (%) | 1355 (65%) | 746 (65%) | 437 (68%) | 267 (70%) | 120 (72%) | 60 (78%) | 13 (86%) |
| Physical impairment at study entrya (%) | 1051 (50%) | 489 (43%) | 238 (37%) | 123 (32%) | 44 (26%) | 18 (24%) | 3 (20%) |
| Age at which individual left school | 14.8 (2.1) [10, 26] | 14.9 (2.2) [10, 26] | 15.1 (2.3) [10, 26] | 15.1 (2.4) [10, 26] | 15.1 (2.0) [10, 26] | 15.2 (2.0) (Fries 245–50) | 15.3 (2.4) [13, 21] |
| Age at death | 88.5 (5.4) [75.2, 106.6] | 89.7 (5.0) [78.1,106.6] | 91.6 (4.4) [81.8, 106.6] | 92.7 (5.9) [85.0, 106.6] | 94.6 (3.2) [88.7, 106.6] | 94.6 (2.0) [91.6, 102.1] | 98.2 (1.5) [95.7, 100.7] |
aImpairment defined as present when the individual could not walk unaided around town or the block.