Table 1.

Baseline characteristics of persister/regressor and progressor groups

		Persister/regressor (n = 35)	Progressor (CIN3 +) (n = 34)	Statistical significance
Age	Mean (range)	21.50 (17–24)	21.91 (19–24)	P = 0.3159 (M–W U*)
Smoker	Yes	11 (31.4%)	13 (38.2%)
	No	22 (62.8%)	21 (61.8%)	P = 0.5367 (Chi-square)**
	Unknown	1 (2.9%)	–
	ND	1 (2.9%)	–
Vaccine	Yes	16 (45.7%)	11 (32.4%)
	No	8 (22.8%)	8 (23.5%)	P = 0.4054 (Chi-square)**
	Unknown	10 (28.6%)	15 (44.1%)
	ND	1 (2.9%)	–
Lesion area	Mean (range)	0.2717 (0.0093–1.347)	0.5366 (0.0112–2.148)	P = 0.0039 (M–W U*)

*Mann–Whitney U; **Comparison of the categorical responses within the 'smoker' group and within the 'vaccine' group