| Literature DB >> 33311424 |
Francesco Sartorio1, Giorgio Ferriero2, Stefano Corna3, Francesca Dal Negro4, Mario DeAngeli5, Andrea Cudazzo6, Stefano Vercelli7.
Abstract
BACKGROUND: Neuro-muscular fatigue (ANM) in the upper limbs can cause impaired coordination and dexterity. The main purpose of the study was to investigate whether ANM induced by a working day produced a reduction in digital dexterity in a population of dental health workers (OSD). Secondary objective was to investigate whether there were relationships between any reductions in dexterity and independent socio-demographic variables (gender, age and profession).Entities:
Mesh:
Year: 2020 PMID: 33311424 PMCID: PMC7809987 DOI: 10.23749/mdl.v111i6.10151
Source DB: PubMed Journal: Med Lav ISSN: 0025-7818 Impact factor: 1.275
Figura 1Esecuzione del Functional Dexterity Test. a - afferrare ed estrarre il piolo con una pinza tri-digitale; b,c - mantenendo la presa del piolo, ruotarlo sottosopra di 180°; d - reinserirlo nel foro
Figure 1 - Functional Dexterity Test administration. a - grasp the peg and pull it out with a tripod pinch; b,c – rotate the peg upsidedown; d – reinsert the peg into the hole
Informazioni demografiche del campione
Table 1 - Demographic information of the sample
| Subjects | N |
| All | 50 |
| Males | 28 |
| Females | 22 |
| Dentists | 30 |
| Hygienists/Assistants | 20 |
| Age (mean SD) | 46 (13) |
Figura 2Rappresentazione grafica (Box-plot) dei punteggi del FDT ottenuti al mattino (tempo inizio) ed al termine della giornata lavorativa (tempo fine), distinti per mano dominante e non dominante. I box-plot rappresentano la mediana (quadrato), il primo e terzo quartile (box), e i valori massimo e minimo (baffi)
Figure 2 - Graphical representation (Box-plot) of the FDT scores obtained in the morning and at the end of the working day, divided by dominant and non-dominant hand. The box-plots represent the median (black square), the first and third quartiles (boxes), and the maximum and minimum values (whiskers)
Risultati dell’ANOVA per misure ripetute a due vie
Table 2 - Output from a Two-Way Repeated Measures ANOVA
| Contrasts Within Subjects | ||||||
| Variable | Squared sum | df | Squared Means | F | Partial r2 | |
| Side | 125.706 | 1 | 125.71 | 25.24 | <0.001 | .340 |
| Error (Side) | 244.053 | 49 | 4.98 | |||
| Time | 637.816 | 1 | 637.82 | 210.30 | <0.001 | .811 |
| Error (Time) | 148.614 | 49 | 3.03 | |||
| Side * Time | .819 | 1 | 0.82 | .64 | 0.428 | .013 |
| Error (Side * Time) | 62.838 | 49 | 1.28 | |||
| Paired Contrasts | ||||||
| (I) Side | (J) Side | Mean Difference (I-J) | Error SD | 95% C.I.b | ||
| Lower Limit | Upper Limit | |||||
| 1 | 2 | -1.586 | .316 | <0.001 | -2.220 | -.951 |
| (I) Time | (J) Time | Mean Difference (I-J) | Error SD | 95% C.I.b | ||
| Lower Limit | Upper Limit | |||||
| 1 | 2 | -3.572 | .246 | <0.001 | -4.067 | -3.077 |
| 2 | 1 | 3.572 | .246 | <0.001 | 3.077 | 4.067 |
a Bonferroni’s correction for multiple comparisons; b 95% Confidence Interval
Risultati dell’analisi di regressione multipla effettuata per entrambi i lati sulle differenze (delta) tra le prove eseguite al termine (post) e prima (pre) di cominciare la giornata lavorativa
Table 3 - Results of the multiple regression analysis carried out for both sides on the differences (delta) between the tests performed at the end (post) and before (pre) starting the working day
| Dominant Side | ||||||||
| Model summary | ||||||||
| Model | R | R2 | Correct R2 | Error SD | ||||
| 1 | 0.332a | 0.110 | 0.092 | 1.91615 | ||||
| 2 | 0.432b | 0.186 | 0.152 | 1.85119 | ||||
| Coefficients | ||||||||
| Model | Non stand. Coefficient | Stand. Coeff. | t | 95% C.I. for B | ||||
| B | Error SD | Beta | Lower Limit | Upper Limit | ||||
| 1 | (Constant) | 1.351 | 0.979 | 1.381 | 0.174 | -0.616 | 3.319 | |
| age | 0.050 | 0.020 | 0.332 | 2.461 | 0.017 | 0.009 | 0.091 | |
| 2 | (Constant) | 1.213 | 0.948 | 1.279 | 0.207 | -0.694 | 3.119 | |
| age | 0.068 | 0.021 | 0.455 | 3.190 | 0.003 | 0.025 | 0.112 | |
| job | -1.223 | 0.576 | -0.302 | -2.121 | 0.039 | -2.382 | -0.064 | |
| Non dominant side | ||||||||
| Model summary | ||||||||
| Model | R | R2 | Corrected R2 | Error SD | ||||
| 1 | 0.477a | 0.228 | 0.212 | 1.92409 | ||||
| Coefficients | ||||||||
| Model | Non stand. Coeff. | Stand. Coeff. | t | 95% C.I. limits for B | ||||
| B | Error SD | Beta | Lower | Upper | ||||
| 1 | (Constant) | -0.216 | 0.983 | -0.022 | 0.827 | -2.192 | 1.759 | |
| age | 0.077 | 0.020 | 0.477 | 3.80 | <0.001 | 0.036 | 0.118 | |
a. Predictors: (Constant) age
b. Predictors: (Constant) age job