2. Participants disposition of included studies.

Study	Intervention (s) and comparator (s)	Screened/eligible (n)	randomised (n)	Analysed (efficacy; n)a	Analysed (safety; n)	Finishing trial (n (%))b
Aydogdu 2011	Tadalafil 20 mg/day, 3 days/week	85/74	NR	32	NR	32
	No treatment		NR	33	NR	33
	Total		74	65	—	65
Kim 2016	Daily sildenafil 50 mg	100/97	49	47	47	37
	On‐demand sildenafil 100 mg		48	47	47	37
	Total		97	94	94	74
McCullough 2010	Daily sildenafil citrate 50 mg	227/212	73	59	NR	59
	Daily intraurethral alprostadil 125 μg (dose titration 250 μg)		139	97	NR	97
	Total		212	156	—	156
Montorsi 2008	Daily vardenafil 5–10 mg	997/628	210	143	207	137
	On‐demand vardenafil 5–20 mg		208	149	204	141
	Placebo		210	153	206	145
	Total		628	445	617	423
Montorsi 2014	Daily tadalafil 5 mg	583/423	139	139	139	98
	On‐demand tadalafil 20 mg		143	142	143	112
	Placebo		141	141	141	105
	Total		423	422	423	315
Pace 2010	Daily sildenafil 50 mg or 100 mg	NR/40	20	20	NR	20
	No treatment		20	20	NR	20
	Total		40	40	—	40
Padma‐Nathan 2008	Daily sildenafil 100 mg	238/125	41	28	41	28
	Daily sildenafil 50 mg		41	23	40	23
	Placebo		43	25	42	25
	Total		125	76	123	76
Pavlovich 2013	Daily sildenafil 50 mg with on‐demand placebo	102/100	50	36	50	36
	On‐demand sildenafil 50 mg (maximum 6 tablets/month) with daily placebo		50	38	50	38
	Total		100	74	100	74
Grand Total			1699	1307	1357	1223

n: number of participants; NR: not reported.

^aThe number of participants in erectile function outcome.

^bThe number of participants finishing the trial at the end of the washout period or open‐label treatment.