Table 3.

Possible causative agents according to reaction grade severity.

Drugs	Grade I	Grade II	Grade III
	n (%)	n (%)	n (%)
NMBAs	16 (26.7)	4 (6.6)	2 (3.3)
Hypnotics	14 (23.3)	1 (1.7)	1 (1.7)
Antibiotics	2 (3.3)	3 (5)	0 (0)
Opioids	3 (5)	0 (0)	0 (0)
Latex	1 (1.7)	1 (1.7)	1 (1.7)
NSAIDs	1 (1.7)	0 (0)	0 (0)
Other	2 (3.3)	0 (0)	3 (5)
Not answered	11 (18.3)	6 (10)	1 (1.7)

NMBAs: Neuromuscular blocking agents, NSAIDs: Non-steroidal anti-inflammatory drugs.

p>0.05 (Fisher’s exact test).