Table 1.

Characteristics of included articles

References	Country	Methodology	Modalities discussed	No. of adult nephrologistsa	Gender	Age	Qualitative methodology and qualitative data analysis as reported in the original articleb
Qualitative studies
Combes et al. [26]	UK	Interview	HHD, PD	29	NR	NR	NR
Ghahramani et al. [29]	USA	Focus group	Kidney transplantation	16	60% male	Median age 58 years	NR
							Thematic content analysis
Grubbs et al. [30]	UK, USA	Interview	CCM	59	76% male	≤45 years 58%	Narrative and thematic analysis
						46–65 years 34%	Constant comparative analysis
						≥66 years 9%
Hanson et al. [31]	Australia, New Zealand	Interview	Living kidney donor transplantation	41	80% male	30–39 years 15%	Grounded theory
						40–49 years 37%	Thematic analysis
						50–59 years 32%
						>60 years 7%
Ladin et al. [33]	USA	Interview	CCM	35	80% male	NR	NR
							Thematic and narrative analysis
Tong et al. [38]	Italy, Portugal, France, Germany, Sweden, Argentina	Interview	HHD	28	69% malec	20–29 years 2%	Grounded theory
						30–39 years 14%	Thematic analysis
						40–49 years 41%
						50–59 years 31%
						60–69 years 12%c

References	Country	Methodology	Modalities discussed	N of adult nephrologistsa	Gender	Age	Response rate	Barriers
Quantitative studies
Allen et al. [25]	Internationald	Survey	NCHDe	259	NR	NR	15.6%	Indicate per statement (n = 4) if barrier or not (dichotomous)
								Provide other barriers (open question)
Dahlan et al. [27]	Saudi Arabia	Survey	PD	124	90% male	30–39 years 14.5%	62.9%	Indicate per statement (n = 10) if major role or minor role (dichotomous)
						40–49 years 33.0%
						50–59 years 39.5%
						>60 years 3.0%
Desmet et al. [28]	Belgium	Survey	PD	97	NR	NR	80.8%	Select 3 most important of 12 statements
Jayanti et al. [32]	Internationalf	Survey	HHD	272	NR	35–44 years 22.4%	NR	Indicate per statement (n = 6) if barrier or not (dichotomous)
						45–54 years 35.7%
						55–64 years 29%
Ludlow et al. [34]	Australia	Survey	HHD, PD	44	NR	NR	26%	Indicate per statement (n = 18) if agree/neutral/disagree (categorical)
								Provide other barriers (open question)
Parvez et al. [35]	USA	Survey	CCM	265	71% male	20–29 years 1.0%	2.7%	Indicate per statement (n = 8) if (strongly) agree/neutral/(strongly) disagree (categorical)
						30–39 years 29.7%
						40–49 years 30.8%
						50–59 years 19.4%
						60–69 years 16.0%
						≥70 years 3.4%
Savla et al. [36]	Bangladesh	Survey	PD	43	NR	NR	NR	Select five most important of unknown number of statements
Thumfart et al. [37]	Germany	Survey	NCHDd	286	NR	<45 years 23%	13.9%	Indicate per statement (n = 3) if agree/uncertain/disagree (categorical)
						45–54 years 44%		Indicate per statement (n = 4) if barrier or not (dichotomous)
						>55 years 33%
Walker and Marshall [39]	New Zealand	Survey	PD	30	NR	NR	48%	Indicate importance per statement (n = 8) on 3-point scale (categorical)
Walker et al. [40]	New Zealand	Survey	HHD PD	49	NR	NR	70%	Indicate importance per factor (n = 15) on 7-point scale (categorical)

N/A, not applicable; NR, not reported.

^aTrainees, paediatric nephrologists, etc., excluded.

^bSee Bristowe et al. for more information on qualitative research theories in nephrology [92].

^cGender and age distribution of all participants (including nurses).

^dRespondents from USA (26.7%), Europe (21.5%), South America (12.9%), Canada (11.9%), Asia (10.9%), Africa/Middle East (10%) and Australia/New Zealand (6.1%).

^eNon-conventional haemodialysis includes nocturnal haemodialysis (NHD), short daily haemodialysis (SDHD), long, thrice weekly conventional haemodialysis. NHD and SDHD included both home and in-centre HD.

^fRespondents from Europe (61.4%), Middle East (9.6%), Asia (8.8%), North America (7.7%), South and Central America (5.9%), Oceania (3.7%) and Africa (2.9%).