Measuring thyroid peroxidase antibodies on the day nulliparous women present for management of miscarriage: a descriptive cohort study

Table 1 Baseline characteristics

Parameter	Controls n = 162	Cases n = 118	P
Age (years)	31	33	0.028
Age (years)	(29 – 34)	(28–37)	0.028
Ethnicity			ns
Caucasian	85%	83%
West South Asian	12%	13%
North East Asian	1%	2%
Pacific	1%	2%
Gravidity	2	2	0.023
Gravidity	2–2.75	1 - 3	0.023
Parity*	2	0	< 0.0001
Parity*	2–2.75	0 - 0	< 0.0001
Gestational age at sampling (weeks)	9	9	ns
Gestational age at sampling (weeks)	8 - 10	8 - 11	ns
Gestation Age at delivery (weeks)	39.3	N/A	-
Gestation Age at delivery (weeks)	38.4 - 40.3	N/A	-
Birthweight (g)	3445	N/A	-
Birthweight (g)	3120 - 3780	N/A	-

Values in column 2 and 3 show median and interquartile range (25th to 75th percentile) for each parameter, except ethnicity which is shown in %.
Wilcoxon rank sum test, P > 0.05 is considered non significant (ns).
* Parity includes the index pregnancy.

ISSN: 1477-7827