BioMed Research International / 2014 / Article / Tab 3

Research Article

A Cohort Study on Self-Reported Respiratory Symptoms of Toner-Handling Workers: Cross-Sectional and Longitudinal Analysis from 2003 to 2008

Table 3

Prevalence of self-reported respiratory symptoms.

1st survey2nd survey3rd survey4th survey5th survey6th survey
Toner-handling groupNever-toner-handling group value#Toner-handling groupNever-toner-handling group value#Toner-handling groupNever-toner-handling group -value#Toner-handling groupNever-toner-handling group -value#Toner-handling groupNever-toner-handling group -value#Toner-handling groupNever-toner-handling group -value#

Subjects number 1071 415 1045 388 1028 371 1016 361 993 352 986 342
Persistent cough (%)47 (4.4%)19 (4.6%)0.8938 (3.6%)17 (4.4%)0.5444 (4.3%)14 (3.8%)0.7634 (3.3%)18 (5.0%)0.2044 (4.4%)9 (2.6%)0.1540 (4.1%)12 (3.5%)0.75
Persistent phlegm (%)50 (4.7%)12 (2.9%)0.1541 (3.9%)13 (3.4%)0.7542 (4.1%)8 (2.2%)0.1038 (3.7%)10 (2.8%)0.5038 (3.8%)7 (2.0%)0.1244 (4.5%)10 (2.9%)0.27
Persistent cough and phlegm (%)18 (1.7%)4 (1.0%)0.477 (0.7%)8 (2.1%)0.0416 (1.6%)6 (1.6%)1.0015 (1.5%)7 (1.9%)0.6219 (1.9%)2 (0.6%)0.1321 (2.1%)4 (1.2%)0.36
Wheezing without asthmatic response (%)68 (6.3%)18 (4.3%)0.1757 (5.5%)10 (2.6%)0.02*45 (4.4%)10 (2.7%)0.1648 (4.7%)10 (2.8%)0.1329 (2.9%)10 (2.8%)1.0024 (2.4%)13 (3.8%)0.19
Breathlessness (%)111 (10.4%)22 (5.3%)<0.01**92 (8.8%)19 (4.9%)0.01*80 (7.8%)12 (3.2%)<0.01**69 (6.8%)16 (4.4%)0.1366 (6.6%)11 (3.1%)0.02*57 (5.8%)8 (2.3%)<0.01**

value of Chi-square test, and .

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