AIM: This study was carried out in order to determine the level of mismatch
between students' body size and the furniture (chair/desk) that they use at
two primary schools including urban and suburb primary schools in Haiphong
city, Vietnam.
SUBJECTS: A total of 240 student participants (2 schools x 3 form levels x
40 students per form) were investigated (120 boys and 120 girls). They were
divided into age groups (6, 8 and 10 years) according to the grade of each
child at the moment of the survey.
METHODOLOGY: The body size of each student was assessed using standard
anthropometric measurement techniques including measurements of sitting
elbow height, shoulder height, upperarm length, knee height, popliteal
height, buttock-popliteal length, stature and weight. The existing furniture
dimensions were also measured, including seat height, depth, and slope:
table/desk height, depth and slope. The comparison between student body size
and furniture dimension were done by using the following criteria of
mismatch: seat height = >99% or <80% of popliteal height: seat depth = <80%
or >99% of the buttock-popliteal length: desk/table is <2cm higher than knee
height: maximum desk height is determined by: hE =0.8517 hEv + 0.1483 hS,
where hEv is vertical elbow height: and hS is shoulder height. And this
value was added by existing seat height and compared with existing desk
height. In addition, the questionnaire on musculo-skeletal discomfort was
applied to assess musculoskeletal discomfort among students.
RESULTS: The results of study showed that there was a gradual increase in
students' body dimensions by age, but not significant differences by gender
and locations (urban or suburb schools). The stature was significantly and
highly correlated to almost body dimensions (r=0.52-0.88, p<0.05 & 0.01),
except sitting elbow height for girls at age 6 years, and for boys age 8 and
10 years (r=0.04-0.12, p>0.05) and upper arm for girls at 6 and 10 years
(r=0.24-0.28, p>0.05). There was a variety of school furniture used in two
schools. Majority of students found the seat too high and too deep or too
shallow depending on grades and schools. In the suburb school, 95-100% of
students in grade 1 85-100% in grade 3 and 75-100% in grade 5 found the
existing seat too high and too shallow. In urban school, 100% of students in
grade 1 found the existing seat too high and too shallow while 55% of
students in grade 3 and 32.5% in grade 5 found their seats too high and too
deep. Almost students were not fit to the existing chair-desk combinations,
except 3 students (accounted for 1.25%) in grade 1 of the suburb school who
were fit one of chair- desk combinations available to them. There were 20.8%
students in urban school and 22.5% of students in suburb school who
complained musculo-skeletal pain in different body parts. The distribution
of complains by grades was different in two schools. The relationship
between mismatch and musculoskeletal pain was not found.
CONCLUSION: Almost students in both schools d...
