Table 3.
Costs in the SGDD and CPC Groups
| Cost | Mean (±SD) [Median] |
P | |
|---|---|---|---|
| SGDD (N=22) | CPC (N=19) | ||
| Total Direct Cost |
$8,790 (±$3,421)
[$6,805] |
$4,090 (±$1,424)
[$3,566] |
<0.001 |
| Study Procedure | $5,585 (±$543) [$5,469] |
$2,151 (±$431) [$2,367] |
<0.001 |
| All Ophthalmic Medications | $1,179 (±$1,443) [$614] |
$1,229 (±$1,054) [$801] |
0.24 |
| IOP-lowering Medications | $881 (±$1,438) [296] |
$831 (±$904) [551] |
0.12 |
| Other Ophthalmic Medications (cycloplegic agents, NSAIDs, antibiotics, corticosteroids, etc.) | $298 (±$115) [$278] |
$397 (±$743) [$160] |
<0.001 |
| Additional Procedures | $1,317 (±$2,474) [$0] |
$250 (±$749) [$0] |
0.15 |
| Clinic Visits | 710 (±$757) [$538] |
460 (±$571) [$269] |
0.30 |
| First Year Total Direct Cost |
$7,651 (±$2,678)
[$6,678] |
$3,539 (±$1,277)
[$3,178] |
<0.001 |
| Study Procedure | $5,585 (±$543) [$5,469] |
$2,151 (±$431) [$2,367] |
<0.001 |
| All Ophthalmic Medications | $692 (±$377) [$601] |
$911 (±$788) [$638] |
0.62 |
| IOP-lowering Medications | $394 (±$340) [$297] |
$514 (±$788) [$638] |
0.23 |
| Other Ophthalmic Medications (cycloplegic agents, NSAIDs, antibiotics, corticosteroids, etc.) | $298 (±$115) [$278] |
$397 (±$743) [$160] |
<0.001 |
| Additional Procedures | $928 (±$2,200) [$0] |
$250 (±$749) [$0] |
0.41 |
| Clinic Visits | $447 (±$399) [$404] |
$227 (±$211) [$135] |
0.11 |
| Global Period Cost |
$6,173 (±$830)
[$5,861] |
$2,569 (±$652)
[$2,628] |
<0.001 |
| Study Procedure | $5,585 (±$543) [$5,469] |
$2,151 (±$431) [$2,367] |
<0.001 |
| All Ophthalmic Medications | $390 (±$146) [$369] |
$418 (±$363) [$297] |
0.41 |
| IOP-lowering Medications |
$114 (±$118)
[$84] |
$162 (±$119)
[$137] |
0.19 |
| Ophthalmic Antibiotics |
$99 (±$88)
[$72] |
$0 (±$0)
[$0] |
<0.001 |
| Topical Corticosteroids |
$168 (±$26)
[$160] |
$151 (±$37)
[$160] |
0.11 |
| Topical NSAIDs |
$10 (±$31)
[$0] |
$114 (±$340)
[$0] |
0.82 |
| Other Ophthalmic Medications (Cycloplegic agents, etc.) |
$3 (±$13)
[$0] |
$9 (±$22)
[$0] |
0.26 |
| Additional Procedures | $198 (±$645) [$0] |
$0 (±$0) [$0] |
0.20 |
| Total Post=Global Period Cost 2 |
$2,789 (±$3,235)
[$1,068] |
$1,597 (±$1,303)
[$1,163] |
0.46 |
| All Ophthalmic Medications | $909 (±$1,452) [$339] |
$887 (±$962) [$512] |
0.22 |
| IOP-lowering Medications |
$876 (±$1,466)
[$246] |
$704 (±$907)
[$376] |
0.23 |
| Other Ophthalmic Medications (cycloplegic agents, NSAIDs, etc.) |
$33 (±$71)
[$0] |
$183 (±$512)
[$0] |
0.95 |
| Additional Procedures | $1,099 (±$2,260) [$0] |
$250 (±$749) [$0] |
0.22 |
| Clinic Visits | $781 (±$758) [$606] |
$460 (±$571) [$269] |
0.14 |
| Monthly Post=Global Period Cost 2 |
$215 (±$314)
[$100] |
$103 (±$74)
[$86] |
0.31 |
| All Ophthalmic Medications | $50 (±$45) [$47] |
$68 (±$68) [$31] |
0.50 |
| IOP-Lowering Medication |
$45 (±$46)
[$33] |
$49 (±$45)
[$30] |
0.51 |
| Other Ophthalmic Medications (cycloplegic agents, NSAIDs, etc.) |
$5 (±$11)
[$0] |
$20 (±$54)
[$0] |
0.92 |
| Additional Procedures | $97 (±$242) [$0] |
$14 (±$47) [$0] |
0.25 |
| Clinic Visits | $67 (±$85) [$44] |
$20 (±$19) [$20] |
0.0233 |
| Post Global Period 1st Year Cost2 |
$1,543 (±$2,325)
[$830] |
$1,041 (±$962)
[$683] |
0.65 |
| All Ophthalmic Medications | $381 (±$354) [$333] |
$564 (±$622) [$285] |
0.50 |
| IOP-Lowering Medications | $345 (±$355) [$246] |
$382 (±$399) [$285] |
0.68 |
| Other Ophthalmic Medications (cycloplegic agents, NSAIDs, etc.) | $33 (±$71) [$0] |
$183 (±$512) [$0] |
0.95 |
| Additional Procedures | $672 (±$1,954) [$0] |
$250 (±$749) [$0] |
0.60 |
| Clinic Visits | $491 (±$391) [$404] |
$226 (±$211) [$135] |
0.0383 |
1
P values obtained from Wilcoxon rank sum test
2
Two patients in the SGDD group were lost to follow-up after global period
3
No longer significant if patients with additional procedures with additional global periods excluded (P=0.10 for monthly clinic visits and P=0.059 for post global period 1st year)
IOP=Intraocular pressure; NSAID=Non-steroidal anti-inflammatory drugs