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Table 2 WMSDs characteristics in special education teachers and teacher’s aides (N = 388)

From: Work-related musculoskeletal disorders and ergonomic risk factors in special education teachers and teacher’s aides

Variables N (%)
Lower back Shoulder Wrist Total count
Regional WMSDs occurrence (regional occurrence/388) 267 (68.8 %) 246 (63.4 %) 220 (56.7 %)  
Severity (pain)
 No pain 121 (31.2 %) 142 (36.6 %) 168 (43.3 %)  
 Mild pain 88 (22.7 %) 100 (25.8 %) 118 (30.4 %)  
 Moderate pain 119 (30.7 %) 113 (29.1 %) 65 (16.8 %)  
 Severe pain 57 (14.7 %) 29 (7.5 %) 37 (9.5 %)  
 Unbearable pain 3 (0.8 %) 4 (1.0 %) 0 (0 %)  
Duration since onset
 1 m to 3 m 69 (17.8 %) 53 (13.7 %) 85 (21.9 %)  
 3 m to 5 m 35 (9.0 %) 24 (6.2 %) 33 (8.5 %)  
 0.5 y to 1 y 45 (11.6 %) 30 (7.7 %) 46 (11.9 %)  
 >1 year 72 (18.6 %) 76 (19.6 %) 79 (20.4 %)  
 No symptoms 137 (35.3 %) 139 (35.8 %) 117 (30.2 %)  
 Missing Data 30 (7.7 %) 66 (17.0 %) 28 (7.2 %)  
Duration of symptoms
 >1 month 61 (15.7 %) 53 (13.7 %) 53 (13.7 %)  
 >3 months 27 (7.0 %) 24 (6.2 %) 18 (4.6 %)  
 >6 months 18 (4.6 %) 30 (7.7 %) 23 (5.9 %)  
 >1 year 95 (24.5 %) 76 (19.6 %) 64 (16.5 %)  
 No symptoms 119 (30.7 %) 139 (35.8 %) 165 (42.5 %)  
 Missing data 68 (17.5) 66 (17.0 %) 65 (16.8 %)  
Frequency of occurrence
 Almost everyday 112 (28.9 %) 98 (25.3 %) 84 (21.6 %)  
 About once a week 55 (14.2 %) 52 (13.4 %) 43 (11.1 %)  
 About twice a week 29 (7.5 %) 28 (7.2 %) 24 (6.2 %)  
 About once a month 27 (7.0 %) 23 (5.9 %) 24 (6.2 %)  
 No symptoms 122 (31.4 %) 138 (35.6 %) 167 (43.0 %)  
 Missing data 42 (10.8 %) 49 (12.6 %) 46 (11.9 %)  
Causing sick leaves -Yes     60 (17.4 %)
 -No     285 (82.6 %)
Considering job change-Yes     113 (33.4 %)
 -No     225 (66.6 %)
Affecting work performance
 Not affecting     78 (20.1 %)
 Mildly affecting     177 (45.6 %)
 Moderately affecting     110 (28.4 %)
 Severely affecting     19 (4.9 %)
 Unable to work     4 (1.0 %)
Participating related continue education courses-Yes     216 (60.3 %)
 -No     142 (39.7 %)