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Table 2 Pooled (age groups 20–25 and > 25) continuation rates (%) from the OS and RCT by age and parity

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

Data source

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)

OS

> 20 parous

2122

86

(84.65; 87.34)

74.79

(73.45; 76.13)

> 20 nulliparous

1245

87

(85.24; 88.75)

78.36

(76.60; 80.12)

< 20 parous

121

82

(74.50; 89.50)

73.00

(64.50; 81.50)

< 20 nulliparous

241

81

(76.00; 86.00)

67.00

(61.00; 73.00)

 

3729

RCT

> 20 parous

203

90.6

(86.58; 94.61)

81.49

(76.10; 86.88)

> 20 nulliparous

50

74.0

(61.84; 86.15)

70.00

(57.29; 82.70)

< 20 parous

0

NA

NA

NA

NA

< 20 nulliparous

0

NA

NA

NA

NA

 

253