Table 1.

The characteristics of the study group of Polish nephrologists (N = 177)

Characteristic	Number of participants (%) or median (IQ range)
Gender
men	64 (36.2%)
women	113 (63.8%)
Age
< 30 years	15 (8.5%)
30–50 years	93 (52.5%)
51–62 years	59 (33.3%)
> 65 years	10 (5.7%)
Years of professional experience	20 (14–30)
Level of professional experience
board-certified	156 (88.1%)
physician in-training	21 (11.9%)
Main place of work
hospital (nephrology department)	100 (56.5%)
hospital (other department)	17 (9.6%)
nephrology out-patient clinic	3 (1.7%)
other out-patient clinic	1 (0.6%)
dialysis unit	56 (31.6%)
Number of workplaces
1	50 (28.2%)
2	57 (32.2%)
3 and more	70 (39.6%)
Hours of work per week
< 40 h	17 (9.6%)
41–50 h	50 (28.2%)
51–60 h	52 (29.4%)
61–75 h	40 (22.6%)
> 75 h	18 (10.2%)
Use of the holiday leave
fully used	94 (53.1%)
partially used	77 (43.5%)
not used at all	6 (3.4%)