Table 2.

Sociodemographic correlates of non-suicidal self-injury (unweighted n = 7,192).

Sociodemographic Characteristics		Lifetime NSSI
	% (SE)a	Odds Ratio (95% CI)	P
Sex
Female	4.99 (0.41)	1.06 (0.80 – 1.39)	.69
Male	4.73 (0.44)	1.00
Race/Ethnicity
Racial/ethnic minority	3.68 (0.94)	0.73 (.43 – 1.23)	.24
White	4.98 (0.29)	1.00
Age (years)
18–29	10.60 (1.07)	8.47 (5.74 – 12.50)	<.001
30–39	6.00 (0.75)	4.56 (3.04 – 6.84)	<.001
40–49	5.86 (0.66)	4.45 (3.05 – 6.48)	<.001
≥50	1.38 (0.21)	1.00
Education
Bachelor’s degree	4.84 (0.64)	1.00
Teaching, Higher National Diploma, or nursing	4.48 (1.04)	0.92 (0.54 – 1.59)	.77
A Level	5.46 (0.82)	1.14 (0.73 – 1.76)	.56
General certificate or secondary education	5.34 (0.60)	1.11 (0.77 – 1.59)	.57
Other qualifications	4.34 (1.38)	0.89 (0.43 – 1.85)	.76
No qualifications	4.20 (0.46)	0.86 (0.61 – 1.22)	.40
Lived with biological parents throughout childhood
None	8.21 (2.11)	2.17 (1.24 – 3.81)	<.01
One	9.09 (1.05)	2.43 (1.83 – 3.22)	<.001
Both	3.96 (0.26)	1.00
Marital status
Never married	9.19 (0.93)	2.60 (1.97 – 3.43)	<.001
Widowed, separated, or divorced	3.93 (0.51)	1.05 (0.76 – 1.45)	.77
Married or cohabiting	3.75 (0.31)	1.00
Household incomeb
Top quintile (≥ £40,384)	3.12 (0.52)	1.00
2nd quintile (£24,700 – £40,383)	4.28 (0.67)	1.39 (0.85 – 2.26)	.19
3rd quintile (£16,195 – £24,699)	4.76 (0.73)	1.55 (1.00 – 2.40)	<.05
4th quintile (£10,575 – £16,194)	4.14 (0.64)	1.34 (0.85 – 2.12)	.21
Bottom quintile (≤ £10,574)	8.70 (0.94)	2.96 (1.96 – 4.46)	<.001
Overall Index of Multiple Deprivation
Top quintile	3.94 (0.61)	1.00
2nd quintile	3.02 (0.47)	0.76 (0.46 – 1.25)	.28
3rd quintile	4.61 (0.66)	1.18 (0.78 – 1.79)	.44
4th quintile	5.25 (0.73)	1.35 (0.88 – 2.08)	.17
Bottom quintile	7.71 (0.83)	2.04 (1.37 – 3.03)	<.001

Note.

^aWeighted prevalence of non-suicidal self-injury is presented for each sociodemographic characteristic.

^bFamily income was weighted using McClements equivalence scores.