Table 2.

Stepwise multiple regression analyses for longitudinal changes in social activity (T2 − T1) in patients with schizophrenia.

Independent variables	Change (T2 − T1)	T1	T2	B	SE	beta	p-values
Model 1; R 2 = 0.11, F = 8.64, p = 4.63 × 10 −3
⊿ Total score of social function	6.3 ± 24.1	96.4 ± 31.4	102.7 ± 24.7	0.18	0.06	0.35	4.63 × 10 −3
Model 2; R 2 = 0.11, F = 8.77, p = 4.32 × 10 −3
⊿ Interpersonal communication	0.4 ± 2.5	6.6 ± 2.8	7.0 ± 2.7	1.72	0.58	0.35	4.32 × 10 −3

T1, time 1; T2, time 2; SE, standard error. Means ± SD are shown. P-values < 0.05 are shown in boldface and underlined. Probability of F to enter ≤0.05, probability of F to remove ≥0.10.