Table 1.
SD-OCT GA at 1- and 2-Year Intervals
|
Node |
1-Year Interval |
2-Year Interval |
||||||
|---|---|---|---|---|---|---|---|---|
|
N Count |
GA Count (%) |
OR (95% CI) |
P Value |
N Count |
GA Count (%) |
OR(95% CI) |
P Value |
|
| A | 372 | 4 (1) | 0.08 (0.03–0.23) | <0.01 | 330 | 7 (2) | 0.14 (0.06–0.32) | <0.01 |
| B | 272 | 16 (6) | 0.78 (0.43–1.41) | 0.41 | 165 | 8 (5) | 0.55 (0.25–1.21) | 0.14 |
| C | 9 | 0 (<33)∗ | - | - | 26 | 0 (<12)∗ | - | - |
| D | 19 | 6 (32) | 6.80 (2.48–18.62) | <0.01 | 19 | 9 (47) | 13.52 (5.19–35.27) | <0.01 |
| E | 24 | 0 (<12.5)∗ | - | - | 31 | 3 (10) | 1.35 (0.39–4.61) | 0.64 |
| F | 105 | 18 (17) | 3.58 (1.97–6.52) | <0.01 | 28 | 10 (36) | 8.45 (3.64–19.61) | <0.01 |
| G | 28 | 8 (29) | 6.07 (2.55–14.47) | <0.01 | 11 | 0 (<27)∗ | - | - |
| H | 8 | 6 (75) | 44.83 (8.83–227.60) | <0.01 | 18 | 10 (56) | 19.36 (7.21–51.96) | <0.01 |
| Total | 837 | 58 (7) | 628 | 47 (7) | ||||
CI = confidence interval; GA = geographic atrophy; OR = odds ratio; SD-OCT = spectral-domain OCT.
∗
Proportions in cells with a count of zero (out of N observations) are estimated using the Rule of 3 whereby the 95% CI for the proportion (%) is between 0 and 3/N.