Table 3.
Demographic information of eligible and ineligible subjects in the BAM Study.
| Eligible (n = 49) |
Ineligible (n = 24) |
P-value | |
|---|---|---|---|
| Female | 27 (55.1) | 11 (45.8) | .46 |
| Age (years) | 9.6 ± 1.4 | 9.6 ± 1.2 | .87 |
| 7 | 4 (8.2) | 3 (12.5) | |
| 8 | 4 (8.2) | 3 (12.5) | |
| 9 | 15 (30.6) | 2 (8.3) | |
| 10 | 12 (24.5) | 8 (33.3) | |
| 11 | 14 (28.6) | 8 (33.3) | |
| Ethnicity | > .99 | ||
| Hispanic or Latino | 1 (2.0) | 1 (4.2) | |
| Not Hispanic or Latino | 48 (98.0) | 23 (95.8) | |
| Race | .95 | ||
| American Indian or Alaska Native | 1 (2.0) | 0 (0.0) | |
| Asian | 10 (20.4) | 8 (33.3) | |
| Native Hawaiian or other Pacific Islander | 0 (0.0) | 0 (0.0) | |
| Black or African American | 1 (2.0) | 1 (4.2) | |
| White | 31 (63.3) | 15 (62.5) | |
| More than one race | 6 (12.2) | 0 (0.0) | |
| Unknown or not reported | 0 (0.0) | 0 (0.0) | |
| Age of first glasses (years) | 7.8 ± 1.3 | 7.5 ± 2.5 | .65 |
| Parental Myopia | |||
| Father | 31 (72.1) | 13 (68.4) | .77 |
| Mother | 32 (72.7) | 16 (72.7) | > .99 |
| Near work (hours/week outside school) | |||
| Study or read for school assignments | 6.4 ± 4.3 | 6.6 ± 5.8 | .87 |
| Read for fun (pleasure) | 6.3 ± 4.6 | 6.8 ± 6.3 | .75 |
| Watch television | 5.6 ± 4.0 | 5.9 ± 4.9 | .77 |
| Use a computer | 4.7 ± 4.1 | 5.2 ± 6.4 | .73 |
| Play video games (Xbox, PlayStation, Wii) | 1.7 ± 2.5 | 1.5 ± 1.7 | .76 |
| Uses handheld electronic devices (iPad, Nintendo DS, etc.) | 5.1 ± 4.6 | 6.8 ± 8.8 | .40 |
| Time spent outdoors | 7.8 ± 4.3 | 7.8 ± 3.7 | .99 |
| Convergence Insufficiency Symptom Survey Score | 13.1 ± 7.9 | 11.8 ± 9.3 | .65 |
Mean ± standard deviation are presented for continuous variables and number (proportion) for categorical data. P-value indicates the comparison between eligible and ineligible subjects.