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Table 1 Percentage of women continuing levonorgestrel IUD at 1 and 2 years by age and parity in the OS (modified from Abraham et al. 2015, [5])

From: Cross design analysis of randomized and observational data – application to continuation rates for a contraceptive intra uterine device containing Levonorgestrel in adolescents and adults

Age group and parity

n

Continuation rate year 1 (in %)

Continuation rate year 1 (95%-Confidence Interval)

Continuation rate year 2 (in %)

Continuation rate year 2 (95%-Confidence Interval)

> 25 parous

1271

86

(84; 87)

76

(74; 78)

> 25 nulliparous

395

87

(83; 90)

77

(72; 81)

20–25 parous

851

86

(83; 88)

73

(73; 76)

20–25 nulliparous

850

87

(85; 89)

79

(79; 82)

< 20 parous

121

82

(73; 88)

73

(63; 80)

< 20 nulliparous

241

81

(76; 86)

67

(61; 73)