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Table 2 Mean scores on the primary outcome measure and one secondary outcome measure for the intervention and control groups at baseline and three-month measurement

From: Randomized controlled pilot trial of supportive text messages for patients with depression

Measure Baseline Three months measurement Mean difference
in change score
P-value (two-tailed) Effect size (Cohen’s d)
Intervention group Control group Intervention group Control group
Mean Becks Depression Inventory-II (SD) 40.1 (8.6) 36.3 (8.8) 20.8 (11.7) 24.9 (11.5) −7.6 (−13.2 to −1.9) 0.01 0.67
Mean self-rated health index Using EQ VAS scores (SD) 44.5 (19.0) 47.1 (19.1) 65.7 (15.3) 57.4 (22.9) 10.7 (−0.2 to 21.5) 0.05 0.51