Table 1

Practice schedules used by participants in each group

Trial	Random	Blocked	Self-directed (P1–P10) and matched control (P1–P9)
Trial	Random	Blocked	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10
1	V	S	S	S	S	S	S	S	S	S	S	S
2	S	S	S	S	S	S	S	S	S	S	S	S
3	H	S	S	S	S	S	S	S	S	S	S	S
4	H	S	S	S	S	S	S	S	S	S	S	S
5	V	S	V	S	S	S	S	S	S	S	S	V
6	S	V	V	V	V	V	V	V	V	V	V	V
7	V	V	V	V	V	V	V	V	V	V	V	V
8	H	V	V	V	V	V	V	V	V	V	H	V
9	S	V	H	V	V	V	V	V	V	V	H	H
10	V	V	H	V	V	V	V	V	V	V	V	H
11	H	H	H	H	H	H	H	H	H	H	V	H
12	S	H	H	H	H	H	H	H	H	H	V	H
13	V	H	S	H	H	H	H	H	H	H	H	S
14	H	H	V	H	H	H	H	H	H	H	H	V
15	S	H	H	H	H	H	H	H	H	H	H	H

H = horizontal mattress suture; S = simple interrupted suture; V = vertical mattress suture.