Table 1.
Urodynamic confirmation between conventional and ambulatory urodynamic studies
| Conventional-UDS outcome | Ambulatory-UDS outcome | Total | ||||
|---|---|---|---|---|---|---|
| Normal | OAB | Dysfunctional | Hypocontractile | Acontractile | ||
| Subset A: 5 × 5 contingency table for conventional-UDS and ambulatory-UDS | ||||||
| Normal | 2 | 19 | 1 | 1 | 1 | 24 |
| OAB | 1 | 8 | 3 | 2 | 0 | 14 |
| Dysfunctional | 0 | 6 | 6 | 7 | 0 | 19 |
| Hypocontractile | 3 | 3 | 5 | 4 | 0 | 15 |
| Acontractile | 2 | 3 | 8 | 8 | 5 | 26 |
| Total | 8 | 39 | 23 | 22 | 6 | 98 |
| Conventional-UDS diagnosis | Patients (n), SNM successful (%) | Confirmed on a-UDS (n), SNM successful (%) | SNM successful (n) in unconfirmed group (%) | Diagnosis solely on a-UDS (n) and success (%) |
|---|---|---|---|---|
| Subset B: patients clustered by history of storage symptoms | ||||
| OABa | 11 (64) | 6 (83) | 2 (40) | 26 (62) |
| OAB with DO | 7 (57) | 4 (75) | 1 (33) | 21 (62) |
| Normal | 18 (56) | |||
| Voiding dysfunction | 10 (60) | |||
| Total | 39 (59)b | |||
| Conventional-UDS diagnosis | Patients (n), SNM failure (%) | Confirmed on a-UDS (n), SNM failure (%) | SNM failure in unconfirmed group (%) | Diagnosis solely on a-UDS (n) and failure (%) |
|---|---|---|---|---|
| Subset C: patients clustered by history of voiding symptoms | ||||
| Acontractile | 23 (65) | 5 (100) | 10 (66) | 1 (100) |
| Hypocontractile | 9 (33) | 4 (75) | 0 (0) | 18 (78)c |
| Dysfunctional voiding | 18 (39) | 8 (37) | 4 (40) | 10 (50) |
| Normal | 6 (50) | |||
| Storage dysfunction | 3 (0) | |||
| Total | 59 (47) | |||
Cramer’s V = 0.336 (p < 0.001). Pearson’s contingency coefficient: C = 0.558 (p < 0.001)
When SNM is successful in patients with a history of storage dysfunction, there is a significant association between the conventional-UDS-based and the ambulatory-UDS-based diagnoses (C = 0.767, p < 0.001). If SNM is not successful, no relation is seen
a-UDS ambulatory urodynamic study, c-UDS conventional urodynamic study, OAB overactive bladder, DO detrusor overactivity
aOAB consists out of OAB-dry and OAB-wet
bThe seven patients with OAB with DO are amongst the 11 OAB patients
cOf the 18 patients of hypocontractile on ambulatory-UDS, ten were only hypocontractile and the eight others had also filling phase contractions. In patients with a history of voiding dysfunction, no significant association is seen, independent of successful SNM