UCLA PTSD reaction index for DSM-5 (PTSD-RI-5): a psychometric study of adolescents sampled from communities in eleven countries

Figures & data

Table 1. Characteristics of the sample.

Country	N participants	N males/N females	M age (SD)
Brazil	289	123/166	13.13 (1.24)
Bulgaria	263	120/143	14.88 (1.41)
Croatia	549	165/384	16.45 (1.01)
Indonesia	453	173/280	15.35 (1.33)
Montenegro	330	140/190	15.67 (1.51)
Nigeria	367	159/208	14.57 (1.42)
Palestine-Gaza	319	163/156	14.98 (2.01)
Philippines	286	158/128	16.53 (.68)
Portugal	628	303/325	15.67 (1.85)
Romania	329	163/166	15.28 (1.47)
Serbia	388	156/232	15.57 (1.51)

Table 2. PTSD-RI-5 item characteristics and correlations with PTSD-RI-5 total scores.

Item	M	SD	Skewness	r
B1	.84	1.23	1.01	.71*
B2	.97	1.25	.83	.68*
B3	.87	1.22	.10	.66*
B4	1.22	1.01	1.54	.72*
B5	1.03	1.29	.32	.69*
C1	1.16	1.33	.47	.65*
C2	1.02	1.37	.44	.60*
D1	.68	1.06	1.57	.59*
D2	1.73	1.20	1.14	.71*
D3	1.50	1.20	1.27	.66*
D4	1.56	1.18	1.07	.76*
D5	.68	1.15	1.36	.55*
D6	.95	1.25	.80	.64*
D7	.85	1.23	.98	.63*
E1	.97	1.16	.92	.53*
E2	.79	1.17	1.31	.59*
E3	1.19	1.23	1.01	.47*
E4	1.07	1.25	.83	.61*
E5	1.08	1.16	.92	.57*
E6	.83	1.17	1.31	.60*
Dis1	.82	1.18	1.32	.59*
Dis2	.92	1.21	1.18	.64*

Diss – Dissociation item; r – average inter-item correlation for an item with the total score; * p < .01

Table 3. Internal consistency reliability of the PTSD-RI-5 scores across countries.

Country	Total	B	C	D	E	Diss
Brazil	.91	.82	.43	.81	.67	.62
Bulgaria	.91	.84	.52	.77	.74	.76
Croatia	.94	.83	.69	.85	.76	.85
Indonesia	.90	.77	.63	.80	.67	.61
Montenegro	.93	.85	.67	.82	.72	.82
Nigeria	.91	.76	.38	.79	.67	.63
Palestine-Gaza	.90	.79	.64	.76	.65	.63
Philippines	.90	.78	.55	.82	.57	.77
Portugal	.94	.88	.62	.85	.75	.78
Romania	.90	.79	.51	.78	.66	.68
Serbia	.93	.87	.69	.82	.80	.68

Diss – Dissociation.

Table 4. Confirmatory factor analysis model fit indexes.

Country	χ^2	df	χ^2/df	TLI	CFI	RMSEA
Brazil	796.14	164	4.85	.72	.75	.12
Bulgaria	424.3	164	2.59	.84	.86	.08
Croatia	662.66	164	4.04	.89	.90	.07
Indonesia	391.58	164	2.39	.90	.92	.06
Montenegro	524.84	164	3.20	.85	.87	.08
Nigeria	330.24	164	2.01	.90	.92	.05
Palestine	354.16	164	2.16	.89	.90	.06
Philippines	2220.93	164	13.54	.41	.49	.21
Portugal	570.83	164	3.48	.92	.93	.06
Romania	505.35	164	3.08	.82	.85	.08
Serbia	511.58	164	3.12	.89	.91	.07

Comparative fit index (CFI); the Tucker–Lewis index (TLI); root-mean-squared error of approximation (RMSEA).

Table 6. Correlation coefficients among RCADS scores and the PTSD-RI-5 scores.

PTSD-RI-5 subscale	RCADS Anxiety score	RCADS Depression score
B	.54 (.23–.65)	.45 (.16–.63)
C	.44 (.16–.52)	.36 (.11–.42)
D	.59 (.25–.69)	.58 (.22–.73)
E	.57 (.48–.67)	.56 (.40–.69)
Diss	.48 (.20–.59)	.48 (.27–65)

Diss – Dissociation; Whole sample correlation and range of the correlations across countries.

Table 5. Standardized regression weights for PTSD-RI-5 items for the overall sample and across eleven countries.

Item	Overall sample	Brazil	Bulgaria	Croatia	Indonesia	Montenegro	Nigeria	Palestine	Philippines	Portugal	Romania	Serbia
B1	.71	.64	.77	.71	.69	.75	.61	.71	.43	.77	.71	.72
B2	.68	.67	.69	.69	.68	.72	.61	.59	.67	.75	.59	.74
B3	.66	.62	.70	.70	.56	.66	.55	.50	.68	.77	.50	.75
B4	.74	.81	.70	.71	.68	.77	.63	.70	.88	.78	.68	.81
B5	.70	.66	.70	.73	.56	.70	.59	.73	.55	.77	.74	.75
C1	.69	.54	.62	.74	.56	.80	.50	.70	.68	.61	.76	.74
C2	.62	.50	.56	.69	.60	.61	.46	.67	.54	.73	.45	.70
D1	.57	.56	.51	.59	.58	.59	.54	.48	.32	.55	.51	.47
D2	.71	.71	.63	.74	.69	.70	.67	.65	.79	.70	.64	.70
D3	.63	.75	.61	.61	.62	.53	.67	.51	.62	.71	.65	.66
D4	.76	.84	.70	.78	.72	.75	.71	.65	.61	.79	.60	.74
D5	.53	.36	.39	.60	.46	.44	.35	.51	.42	.59	.56	.52
D6	.62	.52	.56	.66	.51	.73	.53	.52	.53	.74	.47	.69
D7	.61	.51	.53	.68	.57	.63	.45	.57	.86	.57	.55	.62
E1	.51	.46	.60	.54	.35	.46	.44	.48	.27	.55	.45	.63
E2	.59	.47	.61	.62	.53	.60	.58	.33	.68	.59	.52	.65
E3	.42	.58	.48	.50	.50	.44	.44	.50	.04*	.45	.34	.54
E4	.58	.56	.60	.59	.58	.61	.56	.55	.20	.68	.43	.68
E5	.55	.41	.53	.60	.44	.53	.45	.54	.74	.58	.60	.64
E6	.59	.57	.59	.65	.55	.60	.45	.47	.67	.60	.63	.70

* p > .05; All other standardized regression weights were statistically significant.

Data availability statement

The data that support the findings of this study are available on request from the corresponding author [DS].