Table 2 Per participant annualized costs in Euros (€) by condition, for 3 months prior to baseline, 0–3 months during intervention (t0-t1) and 3–6 months after intervention (t1-t2)
|  | Baseline Mean (SD) | 0–3 months Mean (SD) | 3–6 months Mean (SD) |
|---|---|---|---|
Wait-list control group (n = 138) |  |  |  |
 Direct medical costs | 637.16 (1185.66) | 620.49 (1167.22) | 462.97 (1137.84) |
 Direct non-medical costs | 38.14 (61.87) | 37.50 (59.61) | 25.36 (52.71) |
 Intervention costs | NA | NA | NA |
 Total costs | 675.30 (1245.89) | 657.99 (1223.89) | 488.33 (1189.92) |
Self-help with email support (n = 137) |  |  |  |
 Direct medical costs | 546.83 (1128.45) | 408.09 (939.50) | 478.05 (956.73) |
 Direct non-medical costs | 34.07 (63.50) | 23.58 (44.69) | 27.77 (45.94) |
 Intervention costs | NA | 222 | NA |
Total costs | 580.90 (1190.07) | 653.66 (982.97) | 505.82 (1001.27)a |