Table 1.
Demographic and cognitive profile of Puerto Rican AD patients in Metro versus Northwest-Central regions.
| Variables | All regions | Metro Region | Northwest-Central Region | Difference between regions, p-valuea |
|---|---|---|---|---|
| Age at diagnosis, in years (SD, N) | 77.9 (7.2, 468) | 79.3 (6.9, 287) | 75.8 (7.16, 181) | p < 0.0001 |
| Sex, % female | 65% (314/484) | 66% (195/295) | 63% (119/189) | p < 0.0078 Z-score −2.6606 |
| Education in mean years (SD, N) | 12.7 (3.4, 406) | 13.0 (3.4, 279) | 12.0 (2.8, 127) | p < 0.01 |
| Initial MMSE (SD, N) | 19.9 (5.4, 485) | 20.1 (5.3, 295) | 19.5 (5.2, 190) | p < 0.4396 |
| Last MMSE (SD, N) | 18.4 5.4,354) | 18.6 (5.2, 244) | 17.8 (5.8,110) | p < 0.2868 |
| Initial MMSE (SD, N) | 21.8 (4.48, 198) | 21.8 (4.2, 139) | 21.8 (5.15, 59) | p < 0.6756 |
| Last MMSE (STD, N) | 18.24 (5.38, 198) | 18.4 (5.2, 139) | 17.83 (6.09, 59) | p < 0.5827 |
| Rate of change (first MMSE − last MMSE/year), mean (SD, N) | 1.4 (2.0, 198) | 1.4 (2.0, 139) | 1.4 (2.0, 59) | p < 0.8228 |
AD: Alzheimer’s disease; SD: standard deviation; MMSE: Mini Mental State Examination.
A total of 485 clinical records were reviewed. The N value per parameter is based on the total amount of records that contained the reported information. The rate of change was used only for those records that have two or more MMSE scores and specific date.
a
Non-parametric two-tailed Mann–Whitney test of unpaired t-test data, except for gender that used Z-test for two population proportions.