Table 4. Binomial regression model to explore the association between maternal ethnicity and NTD-affected pregnancy prevalence, unadjusted and adjusted for maternal deprivation and maternal age¹.

Variable	Unadjusted PRR	95% CI	P-value	Adjusted PRR	95% CI	P-value
White (ref)			0.019			0.003
Indian	1.86	1.26-2.75		1.84	1.24-2.73
Pakistani	1.3	0.80-2.11		1.12	0.68-1.85
Bangladeshi	3.1	1.61-5.97		2.86	1.48-5.53
Black Caribbean	1.25	0.52-3.02		1.1	0.46-2.66
Black African	1.17	0.69-1.99		1.04	0.61-1.77
Other ethnic group	0.47	0.31-0.72		0.42	0.27-0.66
IMD quintile 1 (ref) (most deprived)			<0.001			<0.001
IMD quintile 2	0.87	0.72-1.05		0.87	0.71-1.06
IMD quintile 3	0.74	0.60-0.91		0.7	0.56-0.87
IMD quintile 4	0.67	0.54-0.83		0.68	0.53-0.85
IMD quintile 5 (least deprived)	0.7	0.56-0.87		0.69	0.54-0.88
25-29 (ref)			0.378			0.367
<20	1.32	1.02-1.72		1.31	0.99-1.74
20-24	1.03	0.84-1.26		1.01	0.81-1.25
30-34	0.94	0.78-1.14		1.04	0.85-1.28
35-39	1.07	0.87-1.33		1.23	0.98-1.55
40+	1.14	0.78-1.65		1.32	0.90-1.94

¹Data from EMSYCAR and SWCAR.