Table 3.

Adverse events of withdrawal patients according to treatment groups (genotype 1)

Adverse events	PEG-IFN alfa-2a n=2,874	PEG-IFN alfa-2b n=5,564	P-value
	N (%)
Fatigue	144 (5.0)	294 (5.3)	0.605
Interstitial pneumonia	21 (0.7)	32 (0.6)	0.387
Stroke	2 (0.1)	6 (0.1)	0.724
Anemia	50 (1.7)	119 (2.1)	0.251
Decreased appetite	90 (3.1)	179 (3.2)	0.896
Thrombocytopenia	46 (1.6)	50 (0.9)	0.005
Psychiatric disorders	63 (2.2)	137 (2.5)	0.497
Retinopathy	13 (0.5)	44 (0.8)	0.091
Other	145 (5.0)	274 (4.9)	0.833

Abbreviation: PEG-IFN, pegylated interferon.