Table 1

Summary of intrauterine device users’ characteristics and experiences at 1 year

Characteristic	Total (N=130)	Standard IUD (N=63)	Mini IUD (N=67)	P value
Mean age (years) (SD)	24.8 (5.04)	25.9 (4.63)	23.9 (5.23)	0.021*
Uterine sounding length at insertion (cm)^†
Range	5.5–9.5	6–9	5.5–9.5
Mean sounding length	7.6^†	7.6^†	7.5
Sounding length median (IQR)	8 (7,8)^†	8(7,8)^†	7.5 (7,8)	0.636^‡

	n (%)	n (%)	n (%)
Pregnancy history^§
Never pregnant	67 (52)^§	24 (39)^§	43 (64)	0.004^¶
Previously pregnant	62 (48)^§	38 (61)^§	24 (36)	0.004^¶
Parity^§
Nulliparous	80 (62)^§	27 (44)^§	53 (79)	<0.0001^¶
Parous	49 (38)^§	35 (56)^§	14 (21)	<0.0001^¶
Attendances in first year following insertion
Users who did not attend in first year	90 (69)	39 (62)	51 (76)	0.079^¶
Users who attended in first year	40 (31)	24 (38)	16 (24)	0.079^¶
Users with no investigations required	103 (79)	49 (78)	54 (81)	0.692^¶
Users for whom investigations were required	27 (21)	14 (22)	13 (19)	0.692^¶
Discontinuation at 1 year
No record of IUD discontinuation	100 (77)	43 (68)	57 (85)	0.023^¶
Record of IUD discontinuation	30 (23)	20 (32)	10 (15)	0.023^¶

IUD discontinuation at 1 year	Total (N=30)	Standard IUD (N=20)	Mini IUD (N=10)	P value
	n (%)	n (%)	n (%)
IUD discontinuation based on parity
IUD discontinuation in nulliparous users	16 (53)	9 (45)	7 (70)	0.260^**
IUD discontinuation in parous users	14 (47)	11 (55)	3 (30)	0.260^**
IUD discontinuation based on pain and/or bleeding
Discontinuation for pain and/or bleeding	17 (57)	14 (70)	3 (30)	0.056^**
Discontinuation unrelated to pain and/or bleeding	13 (43)	6 (30)	7 (70)	0.056^**

*Student’s T-test mean comparison
†Uterine sounding length not stated in the clinical records of 2 standard IUD users
‡Mann-Whitney U test
§Parity not stated in 1 clinical record of a standard size IUD user
¶Pearson’s Chi-square test
**Fisher’s exact test
IUD, intrauterine device.