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. 2017 Feb 17;12(2):e0172146. doi: 10.1371/journal.pone.0172146

Table 1. Characteristics of respondents compared with the Polish general population.

Characteristics Study, Respondents n = 5004 (%) Polish population 31 December 2011, 38538* in thous. (%)
Sex
Male 2243 (44.8) 18654.6 (48.4)
Female 2761 (55.2) 19883.9 (51.6)
Age groups
18–24 513 (10.3) 3762.2 (12.0)
25–34 887 (17.7) 6381.1 (20.3)
35–44 812 (16.2) 5275.0 (16.8)
45–59 1508 (30.1) 8176.9 (26.0)
≥60 1284 (25.7) 7796.5 (24.8)
Education
Primary not completed - 354.0 (1.1)
Lower secondary and primary 400 (8.00) 7094.2 (21.7)
Trade school 960 (19.2) 7260.7 (22.2)
Secondary education 2195 (43.9) 9705.6 (29.7)
Post-secondary - 868.1 (2.7)
University education 1442 (28.8) 5690.2 (17.4)
Refused to answer (unknown) 7 (0.1) 1706.8 (5.2)
Employment (source of maintenance)
Employed 2402 (48.0) 14233 (52.2)**
Unemployed 473 (9.5) 1983 (7.3)
Post secondary/university students 368 (7.4) 2094.7 (7.7)
Retired 1761 (35.2) 8970.7 (32.9)

*As of 31.12.2011 Statistical Yearbook of the Republic of Poland 2012

** Economic activity of the population aged 15 and more. Statistical Yearbook of the Republic of Poland 2012