Table 1.
Comparison of Characteristics Between Participants Included and Excluded From the Study
| Characteristics | Included (n = 51,710) | Excluded (n = 31,184) | P Value |
|---|---|---|---|
| Sociodemographic factors | |||
| Age | 56.4 ± 8.1 | 57.4 ± 7.9 | <0.001 |
| Sex | |||
| Men | 24,367 (47.1) | 13,979 (44.8) | |
| Women | 27,343 (52.9) | 17,205 (55.2) | <0.001 |
| Race | |||
| White | 47,660 (92.2) | 28,055 (91.5) | |
| Non-white | 4050 (7.8) | 2608 (8.5) | 0.001 |
| Townsend deprivation index | −1.20 ± 2.9 | −1.16 ± 3.0 | 0.043 |
| Clinical factors | |||
| BMI (kg/m2) | 27.2 ± 4.4 | 27.3 ± 4.5 | 0.009 |
| Smoking status | |||
| Never | 28,744 (55.6) | 17,525 (57.1) | |
| Previous | 18,107 (35.0) | 10,520 (34.2) | |
| Current | 4859 (9.4) | 2664 (8.7) | <0.001 |
| Spherical equivalent (D) | −0.002 ± 2.0 | −0.90 ± 3.6 | <0.001 |
Numbers are mean ± SD or number (%), unless otherwise stated.
Student t-test or χ2 test where appropriate (2-sided).
Among those excluded, there were missing race data for 521 participants, missing Townsend deprivation index data for 90 participants, missing BMI data for 1168 participants, missing smoking status data for 475 participants, and missing spherical equivalent data for 619 participants.