Risk factors		With complication		Without complication		Statistical Test
Risk factors		EFF	%	EFF	%	Statistical Test
Age	>41	35	32.11	74	67.89	P = 0.004 RR = 1.89
Age	≤41	26	16.99	127	83.01	P = 0.004 RR = 1.89
ASA	III + IV	10	71.43	4	28.57	P = 0.00001 RR = 3.47
ASA	I + II	51	20.56	197	79.44	P = 0.00001 RR = 3.47
Diabetes	Yes	5	83.33	1	16.67	P = 0.0004 RR = 3.81
Diabetes	Not	56	21.88	200	78.13	P = 0.0004 RR = 3.81
Cough Hb ≤ 8 g/dl	≤8	8	47.06	9	52.94	P = 0.02 RR = 2.18
Cough Hb ≤ 8 g/dl	>8	53	21.63	192	78.37	P = 0.02 RR = 2.18
ALTEMEIER	IV-III	26	45.61	31	54.39	P = 0.0001 RR = 2.67
ALTEMEIER	II-I	35	17.07	170	82.93	P = 0.0001 RR = 2.67