Factors associated with LS: bivariate analysis (Kaplan-Meier analysis, log rank test)
| Variable | No of patients (n = 202) | No of patients with LS (n = 14) | p Value | RR (95% CI) |
|---|---|---|---|---|
| Results in bold are significant. | ||||
| CI, confidence interval; LS, late seizures; NA, not applicable; RR, relative risk. | ||||
| Demographic data | ||||
| Male | 97 | 5 | 0.077 | 0.32 (0.09 to 1.21) |
| Female | 105 | 9 | ||
| Past medical history | ||||
| Previous stroke | 32 | 4 | 0.378 | 1.76 (0.49 to 6.29) |
| No previous stroke | 170 | 10 | 0.156 | 0.25 (0.03 to 1.25) |
| Alcohol abuse | 40 | 2 | ||
| No alcohol abuse | 162 | 12 | ||
| Pre-existing cognitive status | ||||
| Pre-existing dementia | 33 | 4 | 0.016 | 4.14 (1.20 to 14.29) |
| No pre-existing dementia | 169 | 10 | ||
| Type of stroke | ||||
| Ischaemic | 177 | 12 | 0.719 | 0.75 (0.16 to 3.54) |
| Haemorrhagic | 25 | 2 | ||
| Aetiology of ischaemic stroke | ||||
| Atheroma | 27 | 1 | 0.321 | 0.36 (0.04 to 2.92) |
| No atheroma | 175 | 13 | ||
| Cardioembolic | 48 | 1 | 0.513 | 0.51 (0.07 to 3.99) |
| Not cardioembolic | 154 | 13 | ||
| Small vessel disease | 37 | 2 | 0.090 | 0.21 (0.03 to 1.62) |
| No small vessel disease | 165 | 12 | ||
| Other known cause | 4 | 0 | NA | NA |
| No other known cause | 198 | 14 | ||
| Undetermined | 61 | 8 | 0.004 | 5.72 (1.52 to 21.56) |
| Not undetermined | 141 | 6 | ||
| Location of the lesions (old) | ||||
| Superficial | 16 | 2 | 0.010 | 5.97 (1.26 to 28.32) |
| Not superficial | 186 | 12 | ||
| Deep | 59 | 5 | 0.897 | 1.08 (0.34 to 3.37) |
| Not deep | 143 | 9 | ||
| Posterior fossa | 10 | 1 | 0.351 | 2.57 (0.33 to 20.21) |
| Not in the posterior fossa | 192 | 13 | ||
| Location of the lesions (new) | ||||
| Superficial | 76 | 7 | 0.008 | 4.52 (1.32 to 15.44) |
| Not superficial | 126 | 7 | ||
| Deep | 120 | 8 | 0.487 | 0.68 (0.23 to 2.04) |
| Not deep | 82 | 6 | ||
| Posterior fossa | 19 | 1 | 0.733 | 0.70 (0.09 to 5.48) |
| Not in the posterior fossa | 183 | 13 | ||
| Location of the lesions (old and new) | ||||
| Superficial | 81 | 7 | 0.017 | 4.01 (1.17 to 13.75) |
| Not superficial | 121 | 7 | ||
| Deep | 135 | 11 | 0.927 | 1.06 (0.28 to 4.02) |
| Not deep | 67 | 3 | ||
| Posterior fossa | 28 | 2 | 0.757 | 0.72 (0.09 to 5.65) |
| Not in the posterior fossa | 174 | 12 | ||
| Occurrence of seizures | ||||
| Early | 11 | 1 | 0.793 | 0.74 (0.08 to 7.23) |
| Not early | 191 | 13 | ||