Table 2: Total health care costs and cost differences based on full purchase cost of light box between fluoxetine and light therapy arms.

Type of costMental-health-related costs
Mental- and non-mental-health-related costs
Treatment groupMedication Light Medication Light

Direct health care costsBefore171.72 (158.68)86.37 (203.68)109.50 (186.77)126.73 (238.13)
After2122.17 (117.75)312.78 (186.09)213.68 (263.29)355.41 (234.47)

Drug costsBefore310.82 (21.74)22.86 (56.93)10.82 (21.74)22.86 (56.93)
After462.80 (70.60)14.63 (55.46)62.80 (70.60)14.63 (55.46)

Total costsBefore582.35 (156.84)109.23 (217.14)120.18 (183.33)149.60 (251.50)
After6184.95 (142.41)327.41 (194.72)276.48 (279.43)369.77 (239.40)
Mean of individual differences between before and after796.40 (206.29) * 207.65 (259.42) * 168.72 (302.09) ** 197.84 (318.58) **

* P < 0.0001.
**Not statistically significant.
Notes: medication: fluoxetine 20 mg once daily, light therapy: light box 30 minutes per day, SD: standard deviation.
*Statistically significant differences were found between the fluoxetine group and light therapy group.
Participants were randomized to either fluoxetine 20 mg once daily or light box 30 minutes each day.
1Total health care costs for the 4 weeks prior to enrollment in study.
2Total health care costs for the 4 weeks prior to the end of the study.
3Total drug costs for the 4 weeks prior to enrollment in study.
4Total drug costs for the 4 weeks prior to the end of the study.
5Total health care and drugs costs for the 4 weeks prior to enrollment in study.
6Total health care and drug costs for the 4 weeks prior to the end of the study.
7The difference in total health care and drug costs for the 4 weeks prior to the enrollment of the study and for the 4 weeks prior to the end of the study.