Objective : To examine whether drug treatment for hypertension prevents the first occurrence of cerebral hemorrhage, a population-based case-control study was conducted in Hirara-city, Okinawa Prefecture, Japan.
Methods : Cases were 36 hypertensive persons, 45 to 84 years of age, who had experienced cerebral hemorrhage from 1991 to 1994. Twenty of them were ascertained to be hypertensive by residential mass health examinations before the occurrence of cerebral hemorrhage, and other cases were ascertained by stroke register. Controls were 158 hypertensive persons unaffected by stroke and other life-threatening diseases, who were matched with their corresponding case for sex, age and mean blood pressure. All controls were ascertained as hypertensive by health examinations in 1991. Data on antihypertensive treatment, during the two years before the occurrence for cases and between April 1992 and March 1994 for controls, were collected by claims for medical care cost and medical records. Conditional logistic regression was employed for matched analyses.
Results : Regarding treatment, 16 (44.4%) cases and 36 (23.5%) controls did not receive antihypertensive drug treatment, and 13 (36.1%) cases and 30 (19.6%) controls had interrupted treatment. Compared with continuously treated persons, untreated persons and interrupted persons had odds ratios of 6.27 (95% confidence interval : 2.21 to 17.8) and 4.94 (1.79 to 13.6) for cerebral hemorrhage, respectively. Cases were prescribed antihypertensive drugs for fewer months than controls. By subgroup analyses limited to the cases ascertained as hypertensive by mass health examinations and their matched controls, the same relation was observed.
Conclusion : Among hypertensive persons, non-treatment and interruption of antihypertensive drug treatment were associated with a higher risk of cerebral hemorrhage. Long-term continuous treatment with antihypertensive drug (s) prevents the first occurrence of cerebral hemorrhage.

STUDY DESIGN: Retrospective case-control study, level 4. PURPOSE: To clarify the risk factors for late subaxial lesion after occipitocervical (O-C) reconstruction. We examined cases requiring fusion-segment-extended (FE) reconstruction in addition to/after O-C reconstruction. OVERVIEW OF LITERATURE: Patients with rheumatoid arthritis (RA) frequently require O-C reconstruction surgery for cranio-cervical lesions. Acceptable outcomes are achieved via indirect decompression using cervical pedicle screws and occipital plate–rod systems. However, late subaxial lesions may develop occasionally following O-C reconstruction. METHODS: O-C reconstruction using cervical pedicle screws and occipital plate–rod systems was performed between 1994 and 2007 in 113 patients with RA. Occipito-atlanto-axial (O-C2) reconstruction was performed for 89 patients, and occipito-subaxial cervical (O-under C2) reconstruction was performed for 24 patients. We reviewed the cases of patients requiring FE reconstruction (fusion extended group, FEG) and 26 consecutive patients who did not require FE reconstruction after a follow-up of >5 years (non-fusion extended group, NEG) as controls. RESULTS: FE reconstructions were performed for nine patients at an average of 45 months (range, 24–180 months) after O-C reconstruction. Of the 89 patients, three (3%) underwent FE reconstruction in cases of O-C2 reconstruction. Of the 24 patients, five (21%) underwent FE reconstruction in cases of O-under C2 reconstruction (p=0.003, Fisher exact test). Age, sex, RA type, and neurological impairment stage were not significantly different between FEG and NEG. O-under C2 reconstruction, larger correction angle (4° per number of unfixed segment), and O-C7 angle change after O-C reconstruction were the risk factors for late subaxial lesions on radiographic assessment. CONCLUSIONS: Overcorrection of angle at fusion segments requiring O-C7 angle change was a risk factor for late subaxial lesion in patients with RA with fragile bones and joints. Correction should be limited, considering the residual mobility of the cervical unfixed segments.
Arthritis, Rheumatoid ; Atlanto-Occipital Joint ; Case-Control Studies ; Decompression ; Follow-Up Studies ; Humans ; Joints ; Pedicle Screws ; Retrospective Studies ; Risk Factors

PURPOSE: Pain from osteoarthritis (OA) is generally classified as nociceptive (inflammatory). Animal models of knee OA have shown that sensory nerve fibers innervating the knee are significantly damaged with destruction of subchondral bone junction, and induce neuropathic pain (NP). Our objective was to examine NP in the knees of OA patients using painDETECT (an NP questionnaire) and to evaluate the relationship between NP, pain intensity, and stage of OA. MATERIALS AND METHODS: Ninety-two knee OA patients were evaluated in this study. Pain scores using Visual Analogue Scales (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), painDETECT, duration of symptoms, severity of OA using the Kellgren-Lawrence (KL) system, and amount of joint fluid were evaluated and compared using a Spearman's correlation coefficient by rank test. RESULTS: Our study identified at least 5.4% of our knee OA patients as likely to have NP and 15.2% as possibly having NP. The painDETECT score was significantly correlated with the VAS and WOMAC pain severity. Compared with the painDETECT score, there was a tendency for positive correlation with the KL grade, and tendency for negative correlation with the existence and amount of joint fluid, but these correlations were not significant. CONCLUSION: PainDETECT scores classified 5.4% of pain from knee OA as NP. NP tended to be seen in patients with less joint fluid and increased KL grade, both of which corresponded to late stages of OA. It is important to consider the existence of NP in the treatment of knee OA pain.
Aged ; Aged, 80 and over ; Female ; Humans ; Knee/pathology/physiopathology ; Male ; Middle Aged ; Neuralgia/*physiopathology ; Osteoarthritis, Knee/*physiopathology