Table 3

Crude and adjusted odds ratios of individuals who have ordered oral contraceptive pills from an online contraceptive service between 10 January 2017 and 25 April 2018 (n=482)

Parameter	Repeat orders (%) (95% CI)	Crude OR (95% CI)	P value	Adjusted OR (95% CI)†	P value	N
All	47.3 (42.8 to 51.9)	–	–	–	–	482
Age group (years)
16–19	46.7 (28.3 to 66.0)	0.99 (0.45 to 2.14)	0.9730	0.96 (0.43 to 2.13)	0.9553	30
20–24	47.0 (39.7 to 54.5)	1 (Ref.)		1 (Ref.)		185
25–29	47.8 (40.3 to 55.3)	0.97 (0.63 to 1.49)		0.97 (0.63 to 1.49)		180
30–34	44.2 (30.4 to 58.7)	0.87 (0.46 to 1.64)		0.87 (0.46 to 1.64)		52
35–39	48.0 (27.8 to 68.7)	1.07 (0.44 to 2.62)		1.08 (0.44 to 2.62)		25
40+	60.0 (26.2 to 87.8)	1.80 (0.47 to 6.80)		1.80 (0.47 to 6.80)		10
Ethnic group
White	54.8 (48.9 to 60.7)	1 (Ref.)	0.0021*	1 (Ref.)	0.001*	290
Black	41.6 (30.4 to 53.6)	0.59 (0.35 to 0.97)		0.53 (0.31 to 0.89)		77
Asian	32.6 (19.1 to 48.5)	0.40 (0.20 to 0.78)		0.39 (0.20 to 0.77)		43
Mixed	31.5 (19.5 to 45.6)	0.38 (0.20 to 0.70)		0.37 (0.20 to 0.69)		54
Other	45.5 (16.7 to 76.6)	0.69 (0.20 to 2.30)		0.63 (0.18 to 2.14)		11
Unknown	14.3 (0.4 to 57.9)	0.14 (0.02 to 1.16)		0.14 (0.02 to 1.16)		7
IMD quintile‡
First (most deprived)	51.5 (43.7 to 59.2)	1 (Ref.)	0.5463	1 (Ref.)	0.4346	169
Second	44.1 (37.2 to 51.2)	0.74 (0.49 to 1.12)		0.71 (0.46 to 1.09)		204
Third	47.8 (37.3 to 58.5)	0.86 (0.52 to 1.44)		0.81 (0.47 to 1.37)		92
Fourth	42.9 (17.7 to 71.1)	0.71 (0.24 to 2.13)		0.62 (0.20 to 1.96)		14
Fifth (least deprived)	0.00 (0.0 to 97.5)§	–		–		1

*p value significant <0.05.
†Adjusted for repeat order from service; age group; ethnic group; IMD quintile.
‡Missing data for two observations for IMD.
§One-sided, 97.5% CI.
IMD, Index of Multiple Deprivation; OR, odds ratio; Ref., reference.