Table 2.

Access to care, contraception, chlamydia trachomatis infection, history and type of voluntary pregnancy interruption (ToP) of undocumented pregnant migrants vs. pregnant women with legal residency status (control group) who had ToP at the Geneva University Hospitals, Switzerland between March 2005 and October 2006

Characteristic or measurement	Undocumented migrants (n = 175)	Missing n(%)	Control group (n = 208)	Missing n(%)	Mean difference (CI95%)° or OR (CI95%)°°
Gravidity (SD)	2.8 (1.6)	1 (0.6)	2.4 (1.4)	6 (2.9)	0.4 (0.1;0.7)°
Parity (SD)	1.2 (1.2)	0	0.8 (0.9)	0	0.4 (0.2;0.6)°
Weeks of pregnancy at first contact with a health professional (SD)	8.0 (2.6)	0	6.9 (2.1)	0	1.2 (0.7;1.6)°
Delayed first contact with a health professional
(>10 weeks of amenorrhea)	14.9%	0	5.8%	0	2.9 (1.4;5.8)°°
(>12 weeks of amenorrhea)	4.0%	0	1.4%	0	2.9 (0.7;11.7)°°
Chlamydia trachomatis infection: (CTI)	12.8%	3 (1.7)	4.4%	2 (1.0)	3.2 (1.4;7.3)°°
CTI by type of contraception:
Condom use	7.0%	3 (1.7)	3.8%	2 (1.0)	1.9 (0.4;9.0)°°
Other means of contraception	15.7%	3 (1.7)	4.8%	2 (1.0)	3.7 (1.4;9.7)°°
Contraception the month of conception:
No contraception	23.4%	0	14.9	0	1.8 (1.04;2.9)°°
Insecure contraception (of those with contraception)	83.6%	0	75.7%	0	1.6 (0.9;2.9)°°
Condom	42.5%	0	46.3%	0	1.4 (0.9;2.1)°°
Calendar (Ogino)	29.9%	0	17.0%	0	2.2 (1.3;3.8)°°
Withdrawal	11.2%	0	12.4%	0	1.1 (0.6;2.3)°°
Secure contraception (of those with contraception):
Pill	12.7%	0	21.5%	0	2.1 (1.1;3.8)°°
Others	3.7%	0	2.8%	0	1.6 (0.4;5.8)°°

°Mean difference for continuous data (if value 0 included in CI95% then p > 0.05),

°°Age-adjusted OR for categorical data (if value 1 included in CI95% then p > 0.05)