Table 1

Baseline variables

Current smokers
(n=12)
Ex-smokers
(n=25)
Never smokers
(n=64)
P value
Age (years)30 (25.5–33.0)32.5 (31.0–33.5)31.0 (28.0–33.0)0.057
BMI23.2 (21.8–26.2)25.3 (20.8–28.3)25.1 (22.1–27.8)0.632
Ethnicity0.208
White European82135
Asian2416
Afro-Caribbean108
Others105
Category of infertility0.077
Anovulatory4111
Male4514
Tubal209
Unexplained11420
Other044
Ovarian surgery0.659
No122360
Yes011
PCOS/PCOM0.351
No71742
Yes5420
  • Values expressed as median (IQR) or n.

  • BMI, body mass index; PCOM, polycystic ovarian morphology; PCOS, polycystic ovary syndrome.