Multigroup latent class model of musculoskeletal pain combinations in children/adolescents: identifying high-risk groups by gender and age

Table 5 Membership and item response probabilities in gender–age (combined) specific LCA modeling

	Gender-age categories	Latent class
	Gender-age categories	minor pain class	moderate pain class	major pain class
Class Membership Probabilities (%)	Girls ≤13	38.8%	31.2%	30.0%
	Girls ≥14	35.5%	59.7%	4.8%
	Boys ≤13	28.6%	36.7%	34.7%
	Boys ≥14	77.8%	5.4%	16.8%
MSP
Neck pain	Girls ≤13	< 0.01#	0.39	0.55
	Girls ≥14	0.10	0.32	1.00
	Boys ≤13	0.14	0.10	0.67
	Boys ≥14	0.13	0.49	0.66
Shoulder pain	Girls ≤13	< 0.01	0.28	0.48
	Girls ≥14	0.07	0.25	0.75
	Boys ≤13	< 0.01	0.19	0.49
	Boys ≥14	0.03	1.00	0.39
Low back pain	Girls ≤13	0.22	< 0.01	1.00
	Girls ≥14	< 0.01	0.43	1.00
	Boys ≤13	0.63	< 0.01	0.65
	Boys ≥14	0.22	< 0.01	0.65
Upper back pain	Girls ≤13	0.08	0.18	0.31
	Girls ≥14	< 0.01	0.23	0.87
	Boys ≤13	0.08	0.06	0.53
	Boys ≥14	0.09	< 0.01	0.63

#: Rho estimates (item response probabilities) was presented. Considerable differences between gender-age categories are shown in bold (≥ 0.1). Test the invariance across age groups (Chi2_dif (36) = 44.78, P-value = 0.150)

ISSN: 1129-2377