Table 3 Predictive accuracy comparison: PNN vs. SSNN on sub-dose groups.

From: Warfarin maintenance dose prediction for Chinese after heart valve replacement by a feedforward neural network with equal stratified sampling

Validation set

Model

Low-dose group (≤ 1.875 mg/day)

Intermediate-dose group (1.875–3.125 mg/day)

High-dose group (≥ 3.125 mg/day)

Under (%)

Ideal (%)

Over (%)

Under (%)

Ideal (%)

Over (%)

Under (%)

Ideal (%)

Over (%)

Internal

PNN

0 (0.0)

0 (0.0)

172 (100.0)

19 (1.2)

1462 (94.4)

68 (4.4)

140 (75.7)

45 (24.3)

0 (0.0)

SSNN

0 (0.0)

15 (8.7)

157 (91.3)

56 (3.6)

1372 (88.6)

121 (7.8)

129 (69.7)

51 (27.6)

5 (2.7)

External

PNN

0 (0.0)

2 (0.7)

289 (99.3)

30 (2.0)

1437 (94.0)

62 (4.0)

69 (80.2)

17 (19.8)

0(0.0)

SSNN

1 (0.3)

28 (9.6)

262 (90.1)

88 (5.8)

1392 (91.0)

49 (3.2)

65 (75.6)

21 (24.4)

0(0.0)