Comparison 4. Histology at 24 months: immediate colposcopy versus cytological surveillance.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
4.1 Histology at 24 months	3		Risk Ratio (IV, Random, 95% CI)	Subtotals only
4.1.1 HPV/Koilocytic atypia	2	656	Risk Ratio (IV, Random, 95% CI)	1.49 [1.17, 1.90]
4.1.2 Any CIN	2	656	Risk Ratio (IV, Random, 95% CI)	2.02 [1.33, 3.08]
4.1.3 CIN1	2	656	Risk Ratio (IV, Random, 95% CI)	2.58 [1.69, 3.94]
4.1.4 CIN2	3	4331	Risk Ratio (IV, Random, 95% CI)	1.25 [0.80, 1.96]
4.1.5 CIN2+	3	4331	Risk Ratio (IV, Random, 95% CI)	1.14 [0.66, 1.97]
4.1.6 CIN3+	3	4331	Risk Ratio (IV, Random, 95% CI)	1.02 [0.53, 1.97]