Table 2.
Comparison of UKHLS participants with complete versus missing cognitive data.
| Participants with complete cognitive data (N⁎ = 40,730) | Participants with one or more missing cognitive measure (N⁎ = 8,528) | |
|---|---|---|
| Gender (n (%)) | ||
| Male | 18,160 (44.6) | 4,418 (51.8) |
| Female | 22,570 (55.4) | 4,110 (48.2) |
| Age (mean (SD)) | 46.9 (18.1) | 48.0 (20.6) |
| Self-rated health (n (%))⁎⁎ | ||
| Excellent | 7,185 (17.6) | 1,523 (17.9) |
| Very good | 14,474 (35.5) | 2,342 (27.6) |
| Good | 11,126 (27.3) | 2,044 (24.1) |
| Fair | 5,817 (14.3) | 1,525 (18.0) |
| Poor | 2120 (5.2) | 1,059 (12.5) |
| Self-rated memory (n (%))⁎⁎ | ||
| Excellent | 1,867 (4.6) | 193 (4.2) |
| Very good | 9,188 (22.6) | 726 (16.0) |
| Good | 15,564 (38.2) | 1,480 (32.6) |
| Fair | 10,709 (26.3) | 1,322 (29.1) |
| Poor | 3,401 (8.4) | 823 (18.1) |
| Highest qualification (n (%))⁎⁎ | ||
| No qualifications | 8,597 (21.4) | 3,058 (38.3) |
| School level | 17,280 (43.0) | 3,087 (38.6) |
| Degree/professional or higher | 14,325 (35.6) | 1,844 (23.1) |
| Cognitive test z-score (mean (SD)) | ||
| Word recall | 0.09 (0.93) | − 1.06 (1.21) |
| Verbal fluency | 0.10 (0.93) | − 0.89 (1.19) |
| Subtraction | 0.07 (0.91) | − 0.84 (1.52) |
| Number sequence | 0.03 (0.97) | − 0.73 (1.38) |
| Numerical problem solving | 0.11 (0.90) | − 1.10 (1.25) |
⁎
Raw numbers, i.e. unweighted.
⁎⁎
Numbers do not add up to total due to missing values of descriptive variables.