Table 1.

Table showing the composition of the missing portions of each dataset with respect to treatment group

Treatment group	No. of patients exhibiting missing outcomes in datasets A–E
	A	B	C	D	E
None	16	17	17	17	16
CSP	16	15	15	15	15
PDN	17	17	17	17	17
Both	18	18	18	18	18
Total	67	67	67	67	66

Each dataset (A–E) features approximately 20 % of outcomes missing at 24 months (and, secondly, at 12, 18 and 24 months)