Table 1:
Baseline characteristics in both groups
| Variables | Cases (n=88) | Controls (n=250) | Test value | Significance of null hypothesis |
|---|---|---|---|---|
| Age (mean ± SD) | 65.6 ± 11.6 | 65.03 ± 10.96 | Z = − 0.239 | P=0.81 |
| Gender M/F | 28 / 60 (31.8%/68.2%) | 124 / 126 (49.6%/50.4%) | χ2 = 8.316 | P=0.004 |
| Level of education | χ2 = 0.579 | P=0.901 | ||
| Elementary | 20 (23.3%) | 50 (20.7%) | ||
| High school | 40 (46.5%) | 118 (48.8%) | ||
| Higher school | 10 (11.6%) | 24 (9.9%) | ||
| Faculty | 16 (18.6%) | 50 (20.7%) | ||
| Marital status | χ2 = 0.877 | P=0.833 | ||
| Single | 4 (4.5%) | 14 (5.8%) | ||
| Widower / widow | 18 (20.5%) | 46 (16.5%) | ||
| Divorced | 10 (11.4%) | 26 (10.7%) | ||
| Married | 56 (63.3%) | 162 (66.9%) | ||
| Residence area - rural/city | 24/62 (27.9%/72.1%) | 120/118 (50.4%/49.6%) | χ2 = 12.968 | P <0.001 |
| Employment | χ2 = 3.6 | P=0.308 | ||
| Employed | 30 (34.9%) | 76 (31.7%) | ||
| Unemployed | 10 (11.6%) | 24 (10%) | ||
| Farmer | 4 (4.7%) | 28 (11.7%) | ||
| Retired | 42 (48.8%) | 112 (46.7%) | ||
| Material status | χ2 = 1.207 | P=0.751 | ||
| Low | 12 (13.6%) | 26 (10.7%) | ||
| Middle | 44 (50%) | 128 (52.5%) | ||
| Good | 30 (34.1%) | 80 (32.8%) | ||
| Very good | 2 (2.3%) | 10 (4.1%) |
Results are presented as frequency in percent or mean plus standard deviation. Statistical significance was confirmed by Mann-Whitney or Chi square test, depending the type of variables, with the statistical threshold of 0.05