Table 3.
Welch F test results exploring the difference-in-difference of the mean changes in the health usage parameters among study participants 6 and 12 months pre- and post index admission.
| Outcome variable (Welch F Test) | SMSa (6 and 12 months), mean difference (95% CI values) | SMS with or without PSSb, 6 and 12 months, mean difference (95% CI values) | TAUc, 6 and 12 months, mean differenced (95% CI values) | F value (df) | P value | Omega square (ω²) |
| 6 months admission | –0.42 (–0.57 to –0.27) | –0.56 (–0.69 to –0.43) | –0.30 (–0.43 to –0.17) | 4.05 (2) | .02 | <.01 |
| 12 months admission | –0.44 (–0.64 to –0.25) | –0.58 (–0.77 to –0.40) | –0.41 (–0.57 to –0.25) | 1.07 (2) | .34 | <.01 |
| 6 months LOS | –0.54 (–3.86 to 2.79) | 3.69 (0.84 to 7.29) | 6.74 (2.75 to 10.73) | 3.95 (2) | .02 | <.01 |
| 12 months LOSe | –0.70 (–4.82 to 3.41) | 3.35 (–0.75 to 7.44) | 5.55 (1.09 to 10.02) | 2.16 (2) | .12 | <.01 |
aSMS: supportive text messaging.
bPSS: peer support service.
cTAU: treatment as usual.
dMean difference: Indicates the mean of the net difference from pre to post index admission time points (eg, 6 months or 12 months).
eLOS: length of stay.