Table 4. Statistical analysis of work accidents (repeated measures ANOVA), Belém, Pará, Brazil, 2009-2016 (n=211).

Variables	df	Sum of squares	Mean square	F	Significance
Type of hazard	2	127.72	63.86	10.78	0.001*
Work shift	2	96.36	48.18	6.08	0.007*
Causative agent	4	78.64	19.66	3.65	0.027*
Location	5	62.97	12.59	11.88	0.000*
Body site	2	17.73	8.87	4.19	0.057

*Statistically significant; df: degrees of freedom.