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Table 1 Comparison of the demographic characteristics of the nurses, n (%)

From: Trajectories of the current situation and characteristics of workplace violence among nurses: a nine-year follow-up study

Items Categories 2010 2015 2019 χ 2 /Z P
Age (Years) <30 506 (53.7) 1080 (51.2) 1311 (51.1) 16.915* 0.010
  30~39 348 (36.9) 737 (34.9) 933 (36.4)   
  40~49 75 (8.0) 236 (11.2) 278 (10.8)   
  ≥50 13 (1.4) 57 (2.7) 44 (1.7)   
Gender Female 894 (94.9) 2049 (97.1) 2396(93.4) 34.249 <0.001
  Male 48 (5.1) 61 (2.9) 170(6.6)   
Marital status Married 605 (64.2) 1430 (67.8) 1628 (63.4) 17.257 0.002
  Single 337 (35.8) 665 (31.5) 922 (35.9)   
  Other 0 (0.0) 15 (0.7) 16 (0.6)   
Only child Yes 392 (41.6) 1098 (52.0) 1291 (50.3) 29.551 <0.001
  No 550 (58.4) 1012 (48.0) 1275 (49.7)   
Education level Technical secondary degree or below 62 (6.6) 63 (3.0) 33 (1.3) 385.760* <0.001
  Junior college 568 (60.3) 1008 (47.8) 811 (31.6)   
  Bachelor’s degree 305 (32.4) 1019 (48.3) 1656 (64.5)   
  Master’s degree or above 7 (0.7) 20 (0.9) 66 (2.6)   
Years worked ≤5 194 (20.6) 381 (18.1) 726 (28.3) 85.897* <0.001
  6~10 294 (31.2) 775 (36.7) 847 (33.0)   
  11~15 204 (21.7) 384 (18.2) 428 (16.7)   
  ≥16 250 (26.5) 570 (27.0) 565 (22.0)   
Professional title Senior 324 (34.4) 687 (32.6) 592 (23.1) 120.281* <0.001
  Medium 288 (30.6) 640 (30.3) 688 (26.8)   
  Junior 330 (30.5) 783 (37.1) 1286 (50.1)   
Post Nurse 901 (95.6) 1977 (93.7) 2432 (94.8) 5.401 0.067
  Head nurse 41 (4.4) 133 (6.3) 134 (5.2)   
Employment type Official staff 495 (52.5) 1068 (50.6) 1213 (47.3) 9.878 0.043
  Contract staff 437 (46.4) 1016 (48.2) 1317 (51.3)   
  Temporary staff 10 (1.1) 26 (1.2) 36 (1.4)   
Department Emergency 59 (6.3) 168 (8.0) 161 (6.3) 77.396 <0.001
  Outpatient 159 (16.9) 265 (12.6) 194 (7.6)   
  Ward 724 (76.9) 1677 (79.5) 2211 (86.2)   
  1. *: The Mann-Whitney U test was used