Table 1.
Demographic and Baseline Clinical Factors of Study Populations by Surgery Group
| Unilateral (n = 1 712 590) |
Delayed Sequential Bilateral Cataract Surgery (n = 3 695 440) |
Delayed Sequential Bilateral Cataract Surgery and Unilateral Surgery (n = 5 408 030) |
Immediate Sequential Bilateral Cataract Surgery (n = 165 609) |
Total (n = 5 573 639) |
|
|---|---|---|---|---|---|
| Decade of life at first surgery (yrs) | |||||
| 0–9 | 1133 (< 0.1) | 689 (< 0.1) | 1822 (< 0.1) | 101 (< 0.1) | 1923 (< 0.1) |
| 10–19 | 2097 (0.1) | 1271 (< 0.1) | 3368 (< 0.1) | 166 (0.1) | 3534 (< 0.1) |
| 20–29 | 4760 (0.3) | 3008 (< 0.1) | 7768 (0.1) | 334 (0.2) | 8102 (0.1) |
| 30–39 | 12 196 (0.7) | 8604 (0.2) | 20 800 (0.4) | 839 (0.5) | 21 639 (0.4) |
| 40–49 | 46 164 (2.7) | 46 021 (1.2) | 92 185 (1.7) | 3078 (1.9) | 95 263 (1.7) |
| 50–59 | 190 144 (11) | 282 911 (7.7) | 473 055 (8.7) | 15 371 (9.3) | 488 426 (8.8) |
| 60–69 | 519 982 (30) | 1 186 682 (32) | 1 706 664 (32) | 53 232 (32) | 1 759 896 (32) |
| 70–79 | 615 410 (36) | 1 589 310 (43) | 2 204 720 (41) | 67 046 (40) | 2 271 766 (41) |
| 80+ | 320 321 (19) | 576 623 (16) | 896 944 (17) | 25 398 (15) | 922 342 (17) |
| Missing age | 383 | 321 | 704 | 44 | 748 |
| Gender | |||||
| Female | 905 774 (53) | 2 225 135 (60) | 3 130 909 (58) | 97 351 (59) | 3 228 260 (58) |
| Male | 800 072 (47) | 1 459 533 (39) | 2 259 605 (42) | 67 790 (41) | 2 327 395 (42) |
| Not reported | 6744 (0.4) | 10 772 (0.3) | 17 516 (0.3) | 468 (0.3) | 17 984 (0.3) |
| Race | |||||
| White | 1 207 426 (71) | 2 816 202 (76) | 4 023 628 (74) | 120 224 (73) | 4 143 852 (74) |
| Black or African American | 139 019 (8.1) | 211 521 (5.7) | 350 540 (6.5) | 11 860 (7.2) | 362 400 (6.5) |
| Asian | 48 297 (2.8) | 73 758 (2.0) | 122 055 (2.3) | 3774 (2.3) | 125 829 (2.3) |
| Other | 19 544 (1.1) | 31 870 (0.9) | 51 414 (1.0) | 2054 (1.2) | 53 468 (1.0) |
| Unknown | 298 304 (17) | 562 089 (15) | 860 393 (16) | 27 697 (17) | 888 090 (16) |
| Insurance | |||||
| Medicare | 431 429 (25) | 1 108 236 (30) | 1 539 665 (28) | 50 655 (31) | 1 590 320 (29) |
| Medicaid | 23 501 (1.4) | 42 490 (1.1) | 65 991 (1.2) | 5267 (3.2) | 71 258 (1.3) |
| Commercial | 928 930 (54) | 2 161 988 (59) | 3 090 918 (57) | 87 356 (53) | 3 178 274 (57) |
| Other | 36 090 (2.1) | 62 335 (1.7) | 98 425 (1.8) | 4915 (3.0) | 103 340 (1.9) |
| Unknown | 292 640 (17) | 320 391 (8.7) | 613 031 (11) | 17 416 (11) | 630 447 (11) |
| Prior eye disease | |||||
| First surgery eye | |||||
| AMD | 46 985 (2.7) | 73 777 (2.0) | 120 762 (2.2) | 3208 (1.9) | 123 970 (2.2) |
| DR | 27 983 (1.6) | 35 539 (1.0) | 63 522 (1.2) | 2040 (1.2) | 65 562 (1.2) |
| Glaucoma | 88 323 (5.2) | 109 414 (3.0) | 197 737 (3.7) | 4928 (3.0) | 202 665 (3.6) |
| Second surgery eye* | |||||
| AMD | — | 79 145 (2.1) | 79 145 (2.1) | 3147 (1.9) | 82 292 (2.1) |
| DR | — | 40 264 (1.1) | 40 264 (1.1) | 2031 (1.2) | 42 295 (1.1) |
| Glaucoma | — | 121 037 (3.3) | 121 037 (3.3) | 4913 (3.0) | 125 950 (3.3) |
| Either eye | |||||
| AMD | 46 985 (2.7) | 117 925 (3.2) | 164 910 (3.0) | 4711 (2.8) | 169 621 (3.0) |
| DR | 27 983 (1.6) | 54 432 (1.5) | 82 415 (1.5) | 2755 (1.7) | 85 170 (1.5) |
| Glaucoma | 88 323 (5.2) | 158 059 (4.3) | 246 382 (4.6) | 7283 (4.4) | 253 665 (4.6) |
AMD = age-related macular degeneration; DR = diabetic retinopathy; — = not applicable.
Data are presented as no. (%).
*
Percentages taken from the number of participants who underwent bilateral cataract surgery (n = 3 695 440, n = 165 609, and n = 3 861 049, respectively).