TABLE 4.
Participants characteristics and their relationship with study withdraw
| Variables | No withdraw group (n = 37) | Withdraw group (n = 20) | P |
|---|---|---|---|
| Age (y), mean (SD) | 54.0 (17.9) | 55.5 (14.7) | .97* |
| Male/female, n (%) | 22 (59)/15 (41) | 11 (55)/9 (45) | .75 |
| Country, n (%) | .59 | ||
| United States | 30 (81) | 15 (75) | |
| Canada | 7 (19) | 5 (25) | |
| Group type, n (%) | .12 | ||
| Control | 16 (43) | 13 (65) | |
| Experimental | 21 (57) | 7 (35) | |
| Customer type, n (%) | .32 | ||
| Renter | 10 (27) | 8 (40) | |
| Buyer | 27 (73) | 12 (60) | |
| Living situation, n (%) | .40 | ||
| Student/employed | 12 (33) | 4 (20) | |
| Unemployed | 9 (24) | 8 (40) | |
| Retired | 16 (43) | 8 (40) | |
| Living arrangement, n (%) | .22 | ||
| Alone | 6 (16) | 6 (30) | |
| Not alone | 31 (84) | 14 (70) | |
| Level of study, n (%) | .68 | ||
| Secondary | 15 (41) | 7 (35) | |
| Post-secondary | 22 (59) | 13 (65) | |
| Visual field deficit, n (%) | .87 | ||
| Peripheral | 11 (30) | 6 (30) | |
| Central | 13 (35) | 6 (30) | |
| Both | 6 (16) | 5 (25) | |
| None | 7 (19) | 3 (15) | |
| Ocular disease, n (%) | .35 | ||
| Central | 14 (38) | 9 (45) | |
| Peripheral | 7 (19) | 1 (5) | |
| General | 16 (43) | 10 (50) | |
| Eye disease onset, n (%) | .93 | ||
| Birth | 12 (32) | 6 (30) | |
| >10 y | 14 (38) | 7 (35) | |
| <6 mo to 10 y | 11 (30) | 7 (35) | |
| Other sensory impairment, n (%) | NV | ||
| No | 30 (81) | 16 (80) | |
| Yes | 7 (19) | 4 (20) | |
| Cognitive impairment, n (%) | NV | ||
| No | 37 (100) | 20 (100) | |
| Physical impairment, n (%) | NV | ||
| No | 31 (84) | 16 (80) | |
| Yes | 6 (16) | 4 (20) | |
| Health condition, n (%) | .69 | ||
| Poor to good | 20 (54) | 13 (65) | |
| Very good | 11 (30) | 5 (25) | |
| Excellent | 6 (16) | 2 (10) |
P value calculated with χ2 test. *P value calculated with Student t test. n = number of participants; NV = “no value” when statistical comparisons were not possible given the frequency distribution of the data; SD = standard deviation.