Table 1.
Descriptive statistics
| Men (n=1562) | Women (n=2019) | P-valueb | |||
|---|---|---|---|---|---|
| Mean/Proportion | SDa | Mean/Proportion | SD | ||
| Memory mistakes [t=baseline] | 0.62 | 0.93 | 0.86 | 1.03 | < 0.001 |
| Memory mistakes [t+ 1] | 0.94 | 1.24 | 1.11 | 1.26 | < 0.001 |
| Memory mistakes [t+ 1]-[t] | 0.58 | 0.99 | 0.58 | 0.98 | 0.916 |
| Mild decline [t+ 1] | 9.9% | 12.8% | < 0.01 | ||
| Moderate decline [t+ 1] | 2.0% | 2.0% | 0.970 | ||
| Age | 68.02 | 6.53 | 68.66 | 6.77 | < 0.001 |
| Years of education | 9.80 | 2.82 | 8.79 | 2.32 | < 0.001 |
| Current worker | 48.7% | 25.8% | < 0.001 | ||
| Longest occupation | |||||
| Professional | 23.0% | 5.4% | < 0.001 | ||
| Clerical | 16.4% | 26.4% | |||
| Manual | 40.3% | 17.1% | |||
| Agriculture/forestry/fishery | 18.2% | 10.8% | |||
| Domestic worker | 2.0% | 40.2% | |||
| Single | 9.7% | 47.1% | < 0.001 | ||
| Home ownership | 89.6% | 86.4% | < 0.01 | ||
| Group activity | 68.6% | 63.9% | < 0.01 | ||
| Current smoker | 45.5% | 7.2% | < 0.001 | ||
| Alcohol consumption | 64.9% | 7.2% | < 0.001 | ||
| Exercise | 52.7% | 48.0% | < 0.01 | ||
| Hearing impairment | 6.6% | 4.2 | < 0.001 | ||
| Diabetes | 7.2% | 4.4% | < 0.001 | ||
| Hypertension | 25.7% | 30.8% | < 0.001 | ||
| Stroke | 3.9% | 3.0% | 0.125 | ||
| Entry wave | |||||
| Wave1 | 45.9% | 45.5% | |||
| Wave2 | 8.7% | 8.0% | |||
| Wave4 | 20.8% | 18.6% | |||
| Wave5 | 24.6% | 27.8% | |||
aSD standard deviation
bWelch’s method to test the difference of averages under the hypothesis of heteroskedasticity. Chi-square test was used for assessing differences of categorical variables between men and women