Table A

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Table A  Baseline characteristics of 875 pregnant women randomised to control group (information leaflet on prenatal tests) or intervention group (leaflet plus touch screen information system). Values are numbers (percentages) unless stated otherwise
 

	Control group (n=430)	Intervention group (n=445)	Difference (95% CI)	P value
Mean (SD) maternal age (years)	29.7 (5.4)	30.1 (5.2)	0.4 ( 1.1 to 0.3)	0.253
Mean (SD) gestation (weeks)	11.8 (2.4)	11.7 (2.2)	0.1 ( 0.3 to 0.3)	0.949
Spielberger state-trait anxiety inventory:
Mean (SD) A-state score	35.9 (9.6)	36.1 (9.3)	0.2 ( 1.5 to 1.1)	0.750
Mean (SD) A-trait score	37.5 (10.1)	37.6 (9.5)	0.1 ( 1.5 to 1.2)	0.831
Domestic Situation:
Spouse or partner	387 (91)	397 (89)		0.206
Parents	22 (5)	18 (4)
Other*	18 (4)	30 (7)
Missing values†	3	0
Employment:
Full time	181 (42)	173 (39)		0.259
Part time	106 (25)	111 (25)
Unemployed	107 (25)	132 (30)
Education	13 (3)	6 (1)
Other‡	21 (5)	20 (5)
Missing values†	2	3
Education:
Secondary	52 (12)	54 (12)		0.126
O level or standard	79 (19)	67 (15)
Vocational	44 (10)	32 (7)
Higher	53 (12)	47 (11)
Further or university	188 (44)	224 (51)
Other§	9 (2)	17 (4)
Missing values†	5	4
Carstairs deprivation category:
1 (affluent)	145 (34)	164 (38)		0.120
2	100 (23)	69 (16)
3	55 (13)	71 (17)
4	35 (8)	27 (6)
5	25 (6)	27 (6)
6	20 (5)	22 (5)
7 (deprived)	46 (11)	47 (11)
Missing values†	4	18

*Divorced, single, or not known.
†Missing values omitted from analysis.
‡Self employed, registered disabled, volunteer or management, part time studies, temporary work.
§Chartered accountancy, industry apprentice, open university, higher national diploma, nursery studies, correspondence course.

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