Table 4.

Risk scoring system used to predict poor visual outcomes after vitrectomy in patients with acute-onset vitreous hemorrhage (VH) of preoperatively unknown origin.

Categories	Reference value (W)	Beta	Beta(W − W ref)	Point = beta(W − W ref)/B [Clarify]	Score
Age
24–40	33.5 (W ref)	−0.004	0	0	0
40–49	44.5		−0.043	−1.0000854	−1
50–59	54.5		−0.082	−1.9092539	−2
60–69	64.5		−0.121	−2.8184224	−3
>70	78.5		−0.176	−4.0912583	−4
Preoperative LogMAR BCVA in affected eye
0–0.5	0.25 (W ref)	−0.112	0	0	0
0.5–1.0	0.75		−0.056	−1.3076873	−1
1.0–1.5	1.25		−0.112	−2.6153746	−3
1.5–2.0	1.75		−0.169	−3.9230619	−4
2.0–2.5	2.25		−0.225	−5.2307491	−5
2.5–3.0	2.75		−0.281	−6.5384364	−7
Preoperative LogMAR BCVA in the fellow eye
0–0.5	0.25 (W ref)	−0.096	0	0	0
0.5–1.0	0.75		−0.048101477	−1.118639	−1
1.0–1.5	1.25		−0.096202955	−2.237278	−2
1.5–2.0	1.75		−0.144304432	−3.355917	−3
2.0–2.5	2.25		−0.19240591	−4.474556	−4
2.5–3.0	2.75		−0.240507387	−5.5931951	−6
Drusen in the fellow eye
no	0 (W ref)	−0.358	0	0	0
yes	1		−0.358	−8.3255814	−8

BCVA, best-corrected visual acuity.

W: reference value.

Beta: beta coefficients used in the logistic regression model.

B: number of regression units that correspond to 1 point. We let B = 0.043 reflect the increase in risk associated with 10-year increases in age.