Table 3.

Summary statistics and results from mixed model analysis of primary and secondary outcomes

		Descriptive statistics		Mixed model analysis
Primary and secondary outcomes	Visit	gPM + (n = 168)	EUC (n = 189)	Difference in LS mean (95% CI)	p-value	Effect size
		Estimated mean (s.e.)	Estimated mean (s.e.)
HSCL-25 Depression	Baseline	36.57 (0.67)	35.15 (0.67)
	6-week	29.95 (0.72)	32.44 (0.69)	3.92 (1.84–5.99)	0.001	0.43
	3 months	29.03 (0.73)	31.28 (0.69)	3.68 (1.54–5.81)	0.001	0.40
	12 months	28.26 (0.78)	25.85 (0.73)	−0.98 (−3.23 to 1.26)	0.39	−0.11
HSCL-25 Anxiety	Baseline	24.82 (0.46)	25.00 (0.46)
	6-week	20.42 (0.49)	21.95 (0.47)	1.35 (−0.22 to 2.93)	0.09	0.22
	3 months	20.03 (0.50)	19.64 (0.47)	−0.57 (−2.21 to 1.06)	0.49	−0.09
	12 months	19.34 (0.54)	17.85 (0.50)	−1.67 (−3.39 to 0.04)	0.06	−0.27
WHODAS 2.0	Baseline	23.53 (0.47)	23.92 (0.47)
	6-week	14.70 (0.49)	15.63 (0.51)	0.87 (−1.4 to 2.22)	0.53	0.17
	3 months	15.73 (0.50)	14.98 (0.51)	−1.14 (−2.96 to 0.69)	0.22	−0.23
	12 months	15.16 (0.56)	13.81 (0.53)	−1.74 (−3.67 to 0.19)	0.08	−0.35
PCL-5	Baseline	25.98 (0.91)	26.72 (0.90)
	6-week	16.07 (0.98)	17.54 (0.93)	0.73 (−2.52 to 3.98)	0.66	0.05
	3 months	10.29 (0.99)	10.32 (0.94)	0.01 (−3.97 to 2.54)	0.67	0.00
	12 months	2.60 (1.07)	3.29 (1.00)	−0.06 (−3.48 to 3.36)	0.97	0.00
PSYCHLOPS	Baseline	16.48 (0.31)	15.72 (0.31)
	6-week	13.35 (0.33)	13.68 (0.32)	1.08 (0.18–1.99)	0.02	0.28
	3 months	13.49 (0.34)	13.60 (0.32)	0.87 (−0.11 to 1.84)	0.08	0.22
	12 months	12.45 (0.36)	11.77 (0.34)	0.07 (−0.95 to 1.10)	0.89	0.02
PG-13	Baseline	27.97 (0.85)	29.19 (0.87)
	6-week	26.83 (0.90)	27.73 (0.91)	−0.32 (−3.06 to 2.43)	0.82	−0.03
	3 months	20.48 (0.92)	21.42 (0.91)	−0.28 (−3.20 to 2.63)	0.85	−0.03
	12 months	19.71 (0.99)	19.79 (0.99)	−1.15 (−4.26 to 1.96)	0.47	−0.12
PQ-B	Baseline	13.33 (0.15)	13.41 (0.15)
	6-week	14.84 (0.16)	14.44 (0.16)	−0.53 (−1.10 to 0.04)	0.07	−0.18
	3 months	15.07 (0.17)	14.96 (0.16)	−0.24 (−0.82 to 0.33)	0.41	−0.08
	12 months	15.88 (0.18)	15.79 (0.17)	−0.19 (−0.81 to 0.43)	0.55	−0.07
APQ: Involvement	Baseline	34.96 (0.82)	34.56 (0.82)
	6-week	33.75 (0.88)	32.95 (0.85)	−0.39 (−3.46 to 2.67)	0.80	−0.04
	3 months	31.90 0.90)	31.86 (0.85)	0.37 (−2.898 to 3.62)	0.83	0.04
	12 months	34.41 0.90)	37.26 (0.91)	3.25 (−0.08 to 6.58)	0.06	0.38
APQ: Supervision	Baseline	14.97 (0.34)	14.81 (0.34)
	6-week	12.91 (0.37)	13.54 (0.35)	0.78 (−0.46 to 2.02)	0.21	0.16
	3 months	12.42 (0.38)	12.42 (0.36)	0.16 (−1.188 to 1.50)	0.82	0.03
	12 months	13.34 (0.41)	12.23 (0.38)	−0.95 (−2.35 to 4.64)	0.19	−0.20
APQ: Positive parenting	Baseline	24.08 (0.43)	24.62 (0.42)
	6-week	23.45 (0.46)	23.59 (0.44)	−0.40 (−1.949 to 1.14)	0.61	0.08
	3 months	21.86 (0.47)	22.26 (0.45)	−0.14 (−1.76 to 1.48)	0.86	−0.03
	12 months	24.19 (0.51)	22.73 (0.47)	−2.01 (−3.70 to −0.31)	0.02	−0.41
APQ: Discipline	Baseline	15.49 (0.32)	14.74 (0.32)
	6-week	13.73 (0.34)	13.52 (0.33)	0.54 (−0.70 to 1.79)	0.39	0.14
	3 months	13.00 (0.35)	13.57 (0.33)	1.33 (0.17–2.49)	0.03	0.33
	12 months	13.29 (0.38)	12.36 (0.35)	−0.17 (−1.40 to 1.05)	0.78	−0.04
APQ: Punishment	Baseline	6.08 (0.15)	6.34 (0.15)
	6-week	5.49 (0.16)	5.55 (0.16)	−0.09 (−0.71 to 0.31)	0.44	−0.03
	3 months	5.41 (0.17)	5.47 (0.16)	−0.27 (−0.79 to 0.31)	0.31	−0.10
	12 months	5.54 (0.18)	5.34 (0.17)	−0.46 (−1.01 to 0.13)	0.10	−0.17
PSC: Total score	Baseline	14.79 (0.49)	16.22 (0.48)
	6-week	13.01 (0.54)	13.99 (0.52)	−0.46 (−2.09 to 1.19)	0.59	−0.06
	3 months	12.43 (0.53)	13.35 (0.53)	−0.52 (−2.23 to 1.20)	0.56	−0.08
	12 months	16.84 (0.62)	17.28 (0.56)	−1.00 (−2.87 to 0.87)	0.30	−0.14
PSC: Attention problems	Baseline	3.89 (0.16)	4.45 (0.16)
	6-week	3.42 (0.17)	3.83 (0.17)	−0.22 (−0.77 to 0.34)	0.44	−0.10
	3 months	3.14 (0.18)	3.77 (0.17)	−0.23 (−0.82 to 0.37)	0.46	−0.10
	12 months	2.05 (0.20)	3.48 (0.17)	−0.35 (−1.00 to 0.30)	0.30	−0.16
PSC: Internalising	Baseline	3.22 (0.11)	3.35 (0.11)
	6-week	2.84 (0.12)	2.97 (0.12)	0.01 (−0.38 to 0.40)	0.96	0.00
	3 months	2.85 (0.12)	3.01 (0.12)	0.04 (−0.38 to 0.45)	0.87	0.03
	12 months	2.66 (0.14)	2.63 (0.13)	−0.16 (−0.61 to 0.29)	0.49	−0.10
PSC: Externalising	Baseline	3.63 (0.11)	3.64 (0.11)
	6-week	3.30 (0.12)	3.30 (0.12)	−0.01 (−0.43 to 0.41)	0.96	0.00
	3 months	3.20 (0.12)	3.37 (0.12)	0.17 (−0.25 to 0.59)	0.43	0.11
	12 months	3.04 (0.14)	2.88 (0.13)	−0.17 (−0.62 to 0.28)	0.46	−0.11

EUC, Enhanced usual care; LS, Least Square; HSCL, Hopkins Symptom Checklist (depression subscale score range: 10–40; anxiety subscale score range: 15–60; higher scores indicate elevated anxiety or depression); PQ-B, Brief Prodromal Questionnaire; WHODAS 2.0, WHO Disability Assessment Schedule 2.0 (total score range: 0–48; higher scores indicate more severe impairment); PCL-5, Posttraumatic Stress Disorder Checklist (total score range: 0–80; higher scores indicate more severe PTSD severity); PSYCHLOPS, Psychological Outcomes Profiles (total score range: 0–20; higher scores indicate poorer outcome); PG-13, Prolonged Grief Disorder 13 (total score range: 11–57; higher scores indicate poorer outcome); PQ, Prodromal Questionnaire; (total score range: 0–64; higher scores indicate poorer outcome); APQ, Alabama Parenting Questionnaire (Parental Involvement subscale score range: 10–50; Positive Parent subscale score range (total score range : 6–30; higher scores indicate poorer outcome); Supervision subscale score range 10–50; Discipline subscale score range 6–30; Punishment subscale score range 3–15; higher scores indicate elevated parental involvement, positive parenting, supervision, discipline and punishment). Paediatric Symptom Checklist is child's self-report (PSC; Attention Problems subscale score range: 0–10; Internalising subscale score range: 0–10; Externalising subscale score range: 0–14). Effect size was calculated by the difference in least square means between intervention and EUC from mixed model divided by the pooled standard deviation.