Developmental pathways of repetitive non-suicidal self-injury: predictors in adolescence and psychological outcomes in young adulthood

Table 2 Participant Categorization According to Individual Longitudinal Value Patterns (N = 475): (a) NSSI Total at T1, T2 and T3 (Mean and SD); (b) Configural Frequency Analysis (Observed and Expected Frequencies); and (c) Gender Distribution for Each Value Pattern

Pattern Labels	NSSI Total			Value Pattern			Configural Frequency Analysis					Gender
Pattern Labels	T1	T2	T3	T1	T2	T3	Observed	Expected	χ²	p	Type/ Antitype	Women	Men
No RepNSSI	0.43 (0.88)	0.44 (0.95)	0.12 (0.51)	0	0	0	328	282.27	7.41	< 0.0001	Type	173^A	155^T
Late-Onset RepNSSI	1.00 (1.41)	0.82 (1.26)	11.50 (10.80)	0	0	1	22	31.00	2.61	0.104		12	10
RepNSSI only at T2	0.94 (1.24)	13.64 (13.02)	0.30 (0.81)	0	1	0	47	78.15	12.42	< 0.0001	Antitype	29	18
RepNSSI at T2 and T3	0.00 (0.00)	13.00 (3.61)	12.67 (10.69)	0	1	1	3	8.58	3.63	0.055		2	1
RepNSSI only at T1	12.53 (12.08)	1.26 (1.33)	0.32 (0.75)	1	0	0	19	52.92	21.75	< 0.0001	Antitype	12	7
RepNSSI at T1 and T3	8.00 (2.65)	2.00 (2.00)	9.00 (5.20)	1	0	1	3	5.81	1.36	0.334		2	1
Stable Adol.-Lim. RepNSSI	22.03 (15.21)	16.71 (13.03)	0.44 (0.93)	1	1	0	34	14.65	25.54	< 0.0001	Type	29^T	5^A
Prolonged RepNSSI	19.58 (14.89)	22.11 (13.54)	12.47 (8.20)	1	1	1	19	1.61	187.94	< 0.0001	Type	14	5

Note. 0 = no repNSSI, 1 = repNSSI. RepNSSI = Repetitive Non-Suicidal Self-Injury (≥ 5 episodes). The labels of the four targeted developmental patterns are in bold
Configural frequency analysis: The expected frequencies were based on an independence model after accounting for marginal probabilities. The probabilities of the observed frequencies are given by the binomial distribution. Type = significantly more observations than expected by chance; antitype = significantly less observations than expected by chance; two-tailed tests, with a 5%-significance level.
Gender distribution: ^T = more common than expected by chance, ^A = less common than expected by chance; exact single-cell test based on the hypergeometric distribution, two-tailed tests with a 1%-significance level.

ISSN: 1753-2000