Table 1 Baseline charateristics of study population after propensity score matching
Characteristic | Exudative AMD group (n = 7119) | Non-AMD group (n = 7119) | P-value | Standardized difference (%) |
|---|---|---|---|---|
Male, No. (%) | 4099 (57.58) | 4134 (58.07) | 0.41 | −0.99 |
Age, No. (%), years | ||||
< 45 | 10 (0.14) | 7 (0.10) | 0.59 | 1.16 |
45–49 | 65 (0.91) | 65 (0.91) | 0.00 | |
50–54 | 438 (6.15) | 442 (6.21) | −0.25 | |
55–59 | 761 (10.69) | 746 (10.48) | 0.68 | |
60–64 | 1092 (15.34) | 1122 (15.76) | −1.16 | |
65–69 | 1334 (18.74) | 1377 (19.34) | −1.53 | |
70–74 | 1428 (20.06) | 1376 (19.33) | 1.84 | |
75–79 | 1110 (15.59) | 1104 (15.51) | 0.22 | |
80–84 | 607 (8.53) | 620 (8.71) | −0.64 | |
≥ 85 | 274 (3.85) | 260 (3.65) | 1.05 | |
Income level, No. (%)a | ||||
0 | 277 (3.89) | 256 (3.60) | 0.66 | 1.53 |
1 | 562 (7.89) | 555 (7.80) | 0.33 | |
2 | 445 (6.25) | 433 (6.08) | 1.25 | |
3 | 421 (5.91) | 419 (5.89) | 0.71 | |
4 | 420 (5.90) | 456 (6.41) | 0.08 | |
5 | 466 (6.55) | 493 (6.93) | −2.12 | |
6 | 545 (7.66) | 547 (7.68) | −1.52 | |
7 | 640 (8.99) | 624 (8.77) | −0.08 | |
8 | 750 (10.54) | 744 (10.45) | 0.77 | |
9 | 1074 (15.09) | 1109 (15.58) | 0.29 | |
10 | 1519 (21.34) | 1483 (20.83) | −1.36 | |
Insurance, No. (%) | ||||
NHI program | 6842 (96.11) | 6863 (96.40) | 0.54 | −1.53 |
Medical aid program | 277 (3.89) | 256 (3.60) | 1.53 | |
Residence, No. (%) | ||||
Seoul (Capital city) | 1649 (23.16) | 1611 (22.63) | 0.79 | 1.26 |
Metropolitan city | 1738 (24.41) | 1720 (24.16) | 0.58 | |
Others | 3732 (52.42) | 3788 (53.21) | −1.58 | |
Charlson comorbidity index, mean (SD) | 0.59 (0.58) | 0.59 (0.56) | 0.96 | 0.00 |
Length of hospitalization during the baseline period, mean (SD), days | 2.41 (14.62) | 2.64 (13.94) | 0.22 | −1.47 |
Number of outpatient visits during the baseline period, mean (SD) | 30.96 (28.22) | 30.97 (28.39) | 0.98 | −0.02 |
Number of emergency department visits during the baseline period, mean (SD) | 0.09 (0.46) | 0.10 (0.40) | 0.76 | −0.32 |