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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.
75,239 questions in 5,342 reviews
current versionsNo studies 15,213 · 20.2%Ungraded 10,323 · 13.7%Very low 17,528 · 23.3%Low 17,951 · 23.9%Moderate 11,190 · 14.9%High 3,034 · 4%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
| Question | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Intervention NR A 22% reduction in injurious crashes in first year and 20% in second year post intervention compared to before. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR A non‐significant 19% reduction in crashes (not defined) A 20% reduction in injury crashes 2 years post intervention Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR After accounting for all potential confounders, the overall average effect of speed cameras on crashes was a reduction of 25% in personal injury crashes (PIA's) and an average 11% reduction in fatal and serious crashes for the 500m monitoring leng... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR At camera sites a reduction of 19% for all crashes and a reduction of 44% for fatal and serious crashes. The authors state that the reduction in total crashes was significantly greater than that expected from the effect of RTM in 12 out of the 20 ... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR Reduction of 50% in personal injury accidents (0‐500m route) Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR Main findings= 5.8km/h reduction in mean speeds at 24 months at camera sites. For percentage exceeding speed limit, a 70% reduction at camera sites and a 20.9% reduction downstream at 12 months. These reductions were maintained at 24 months. For p... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR A significant 56% reduction in fatal crashes relative to controls, a 12% reduction for all crashes and a 25% for serious crashes. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR 23% reduction in number of injury crashes. 66% reduction in fatal crashes. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR Aggregate change in crashes was a significant 12% reduction for experimental roads. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR A reduction of 35% in the total number of crashes for phase 1 and 2 compared to the control roads and the same period 3 years previously. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR Phase 3 ‐ conducted in 1994 on one road in one province Noord‐Brabant. The reduction in crashes found in 1991 had been maintained. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR A significant 20% reduction in injury crashes equating to about 62 injury crashes per year on all 64 road sections combined. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR Reduction of 9.17% in crashes and a significant 32.4% in serious injury compared to New Zealand overall. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Total crash reduction at enforcement zones of 44 to 55%, injury crash reduction of 46 to 56% with no reduction seen in rear‐end crashes Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR Total aggregate crash reduction of 12% on experimental corridors Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Phase 1 ‐ General effects ‐ effect of speed camera program on crash rate and severity covering first twelve month post intervention period. Phase 3, 4 and 5, of this 5‐phase study did not have before‐after data, hence only phase 1 and 2 tabled. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR Reduction in speed and narrowing of speed distribution for 60km/h, 70km/h and 100km/h zones at experimental sites. No further information given. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR Phase 2 ‐ Impact of program mechanisms i.e. number of traffic infringement notices (tin's) hours of speed camera operations, amount of paid TV publicity, demerit points in relation to, injury crash incidence and severity during low alcohol times o... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR Proportion of speeding vehicles in May 1996 (before) at photo radar sites was 66%. By July 1997(after) it was about 35%. At control sites speeding vehicles in September 1995 was about 73%, in November 1996 it was about 61%. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Intervention NR About 25% reduction in crashes to that expected. A significant 11% reduction in number of victims, with an average decrease of 139 daytime traffic crashes requiring an ambulance. A 17% reduction in daytime crash fatalities. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR Outcome measures were numbers of road crashes, numbers of people injured (combined fatal and non‐fatal) and number of vehicles involved in crashes. The relative risk of a road crash after implementation was 0.73 (5% CI = 0.63, 0.85) This effect wa... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR A 45.74% reduction in weighted injury crashes within 250 metres from camera sites (total monthly before count of 23.4 compared to total monthly after count of 12.7) with lesser but still significant decreases observed in the wider surrounding area... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Speed outcomes measured: Mean speed, 85th percentile speed, percentage of vehicles over the speed limit and percentage exceeding the speed limit by more than 15mph. Speed results across all new camera sites included a 2.3mph reduction (6% reductio... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR A 30% reduction in vehicles exceeding the speed limit, and a 43% reduction in vehicles exceeding the speed limit by more than 15 mph. Time over distance cameras were shown to be particularly effective (around 100% reduction) at reducing speeds exc... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR Crash outcomes measured: Killed and seriously injured (KSIs) and personal injury crashes (PICs). Across all sites KSI's decreased by 42%. This equated to about 1700 fewer KSI's per annum at these camera sites. Fixed cameras in both urban (47% redu... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR Over the first 2 years of the study mean speeds fell by 1.3 km/h (‐2.6 to 0.1) and 85th percentile speeds reduced by 4.3 km/h on open roads generally,compared with the rest of the country. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Having controlled for season and general trends, injury crash outcomes in experimental areas relative to control areas were a net reduction of 11% (p= 0.03) in all crashes and 19% (p=0.002) in injury crashes on open roads across the region associa... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | No studies |
Intervention NR Sharp reduction of 5 km/h in median speed on experimental roads after program launch. No further reduction observed despite intensified enforcement. However reduction sustained throughout the 15 month trial period. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Significant average 3.6 km/h decrease in mean speed compared to before. No time halo effect seen. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Moderate |
Intervention NR Net 3.4% speed reduction after consideration of changes in average speeds that occurred at control site during the same before‐after periods. The proportion of drivers exceeding the 80km/h posted speed limit decreased by a net 66%. For speeders ov... Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | High |
Intervention NR A reduction from 66% to 35% in the percentage of speeding drivers at experimental sites compared to before period. Speed cameras for the prevention of road traffic injuries and deaths (2010) · Cochrane | no estimate extracted | NR | Low |
Glatiramer acetate vs placebo Patients who progressed ‐ at 2 years · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | RR 0.75 [0.51, 1.12] | 2 studies · 299 participants | Ungraded |
Glatiramer acetate vs placebo Patients who progressed ‐ at 35 months · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | RR 0.81 [0.5, 1.29] | 1 study · 203 participants | Ungraded |
Glatiramer acetate vs placebo Change in disability score at the end of · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | no estimate extracted | 2 studies · 301 participants | Ungraded |
Glatiramer acetate vs placebo Change in disability score at the end of · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | no estimate extracted | 1 study · 203 participants | Ungraded |
Glatiramer acetate vs placebo Mean number of relapses ‐ within 1 year of · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | no estimate extracted | 2 studies · 287 participants | Ungraded |
Glatiramer acetate vs placebo Mean number of relapses ‐ at 2 years of · patients with multiple sclerosis Glatiramer acetate for multiple sclerosis (2010) · Cochrane | no estimate extracted | 2 studies · 298 participants | Ungraded |
SoF vitamin E vs placebo Frequency of hot flushes Number of hot flushes per day ( · patients with hot flushes in women with a history of breast cancer Non‐hormonal interventions for hot flushes in women with a history of breast cancer (2010) · Cochrane | no estimate extracted | 1 study · 104 participants | High |
SoF vitamin E vs placebo Hot flushes score Number of HF x severity (from 1 to 4) ( · patients with hot flushes in women with a history of breast cancer Non‐hormonal interventions for hot flushes in women with a history of breast cancer (2010) · Cochrane | no estimate extracted | 1 study · 104 participants | High |
SoF gabapentin vs placebo Frequency of hot flushes Number of hot flushes per day ( · patients with hot flushes in women with a history of breast cancer Non‐hormonal interventions for hot flushes in women with a history of breast cancer (2010) · Cochrane | no estimate extracted | 1 study · 233 participants | High |
SoF gabapentin vs placebo Hot flushes score Number of HF x severity (from 1 to 4) ( · patients with hot flushes in women with a history of breast cancer Non‐hormonal interventions for hot flushes in women with a history of breast cancer (2010) · Cochrane | no estimate extracted | 1 study · 233 participants | High |
Benzodiazepine vs Placebo Alcohol withdrawal seizures objective · patients with alcohol withdrawal Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 0.16 [0.04, 0.69] | 3 studies · 324 participants | Moderate |
Benzodiazepine vs Placebo Adverse events · patients with alcohol withdrawal Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 3.28 [0.31, 34.52] | 2 studies · 71 participants | Low |
Benzodiazepine vs Placebo Dropouts · patients with alcohol withdrawal Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 0.68 [0.38, 1.24] | 3 studies · 312 participants | Moderate |
Benzodiazepine vs Other Drug for Alcohol withdrawal seizures ‐ Benzodiazepine vs. Other Drug · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 0.52 [0.21, 1.31] | 12 studies · 1228 participants | Moderate |
Benzodiazepine vs Other Drug for Alcohol withdrawal seizures ‐ Benzodiazepine vs. Anticonvulsant · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 1.7 [0.39, 7.37] | 7 studies · 523 participants | Moderate |
Benzodiazepine vs Other Drug for Adverse events ‐ Benzodiazepine vs. Other Drug · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 1.31 [0.99, 1.72] | 18 studies · 919 participants | Low |
Benzodiazepine vs Other Drug for Adverse events ‐ Benzodiazepine vs. Anticonvulsant · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 1.5 [0.83, 2.7] | 9 studies · 471 participants | High |
Benzodiazepine vs Other Drug for Dropouts ‐ Benzodiazepine vs. Other Drug · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 0.93 [0.7, 1.24] | 22 studies · 1848 participants | Moderate |
Benzodiazepine vs Other Drug for Dropouts ‐ Benzodiazepine vs. Anticonvulsant · patients with Benzodiazepines for alcohol withdrawal (2010) · Cochrane | RR 1.11 [0.75, 1.63] | 11 studies · 839 participants | High |