Sleep therapy research spans behavioral treatment for chronic insomnia and device-based care for obstructive sleep apnea (OSA). The figures below distinguish observed trial results, meta-analytic estimates and study-defined outcomes across adults and CPAP-naive patients.
Key Sleep Therapy Statistics
The most broadly useful figures are:
- 66 randomized controlled trials were identified in an American Academy of Sleep Medicine (AASM) review of CBT-I versus control in adults with chronic insomnia, with evidence reviewed through 2020.
- 49 of those 66 trials provided data suitable for meta-analysis of at least one critical outcome in adult chronic-insomnia research reviewed through 2020.
- CBT-I remission was 33% higher than control across 25 studies of adults with chronic insomnia at post-treatment or study-defined follow-up.
- CBT-I remission was 46% higher than control in seven studies of adults with insomnia without comorbidities at post-treatment or study-defined follow-up.
- CBT-I produced a 45% greater responder rate than control across 16 studies of adults with chronic insomnia at post-treatment.
- Face-to-face CBT-I reduced sleep-onset latency by 19.03 minutes versus inactive comparators among adults with chronic insomnia after treatment.
- Face-to-face CBT-I reduced wake after sleep onset by 26.00 minutes among adults with chronic insomnia after treatment.
- Face-to-face CBT-I improved sleep efficiency by 9.91 percentage points among adults with chronic insomnia after treatment.
- Group CBT-I reduced sleep-onset latency from 52.75 to 25.50 minutes in insomnia-treatment samples after treatment.
- Group CBT-I reduced wake after sleep onset from 77.54 to 36.16 minutes in insomnia-treatment samples after treatment.
- Individual CBT remission was 61% versus 18% for passive control in an AHRQ evidence-table comparison of adults with insomnia at study-defined follow-up.
- Digital CBT-I reduced sleep-onset latency by 15.53 minutes versus inactive control among adults with insomnia after treatment.
- Digital CBT-I improved sleep efficiency by 7.91 percentage points versus inactive control among adults with insomnia after treatment.
- Digital CBT-I produced 48% remission versus 18% in a waitlist control after a 7-week course in one adult trial.
- Peer-supported CPAP users averaged 4.5 hours per night versus 3.7 hours at six-month follow-up among CPAP-naive patients with OSA.
- CPAP use exceeded four hours on 62.0% of nights versus 51.4% at six months in that peer-supported trial.
- CPAP uptake was 82% versus 88% between supportive-information and social-cognitive-therapy groups in a randomized trial of people referred for OSA treatment.
- Six-month CPAP adherence was 55% in one group and 47% in the other in that randomized trial.
Contents
- Sleep therapy statistics: the CBT-I evidence base
- Insomnia therapy data for sleep onset and nighttime wakefulness
- Remission, response and sleep quality statistics
- Digital and group sleep therapy results
- CPAP sleep apnea therapy adherence statistics
- Sleep therapy durability and delivery limits
Sleep Therapy Statistics: The CBT-I Evidence Base
CBT-I means cognitive behavioral therapy for insomnia. The AASM systematic review examined randomized evidence in adults with chronic insomnia disorder, and its study count describes the evidence base rather than insomnia prevalence.
- The review identified 66 randomized controlled trials through 2020, while 49 supplied data suitable for meta-analysis of at least one critical outcome. AASM systematic review
- Among the 49 meta-analyzable studies, 11 had no comorbidities, six included psychiatric comorbidities and 12 included medical comorbidities; the remaining studies mixed populations and were not separately analyzed. AASM systematic review
- Across 25 studies, CBT-I produced a 33% higher remission rate than control at post-treatment or study-defined follow-up, with a 95% confidence interval of 28% to 39% higher.
- In subgroup analyses, remission was 46% higher than control across seven studies without comorbidities, 31% higher across four studies with psychiatric comorbidity, and 35% higher across eight studies with medical comorbidity. These are relative differences, and remission definitions varied by instrument. AASM systematic review
- Across 16 studies, CBT-I produced a 45% greater responder rate than control at post-treatment, with a 95% confidence interval of 39% to 50% higher; evidence quality ranged from low to moderate. AASM systematic review
- For psychiatric comorbidity, three studies found a 49% higher responder rate, while three studies of medical comorbidity found a 58% higher responder rate. Both results are subgroup meta-analytic estimates rather than population rates. AASM systematic review
Insomnia Therapy Data for Sleep Onset and Nighttime Wakefulness
Face-to-face CBT-I changed several sleep-diary measures after treatment, although the total-sleep-time interval included no improvement. Sleep efficiency is time asleep divided by time in bed.
| Face-to-face CBT-I outcome | Difference versus inactive comparator | Period and population |
|---|---|---|
| Sleep-onset latency | 19.03 minutes lower (95% CI, 14.12–23.93) | Post-treatment; adults with chronic insomnia |
| Wake after sleep onset | 26.00 minutes lower (95% CI, 15.48–36.52) | Post-treatment; adults with chronic insomnia |
| Total sleep time | 7.61 minutes higher (95% CI, −0.51–15.74) | Post-treatment; adults with chronic insomnia |
| Sleep efficiency | 9.91 percentage points higher (95% CI, 8.09–11.73) | Post-treatment; adults with chronic insomnia |
Source: AASM systematic review. The review notes that later follow-up precision was less clear for some outcomes.
Group CBT-I results provide observed before-and-after means across six insomnia-treatment studies:
- Mean sleep-onset latency fell from 52.75 minutes before treatment to 25.50 minutes after treatment, a 27.25-minute or 51.66% within-group improvement.
- Mean wake after sleep onset fell from 77.54 to 36.16 minutes, a 41.38-minute or 53.37% within-group improvement.
- Mean sleep efficiency rose from 69.51% to 83.32%, an increase of 13.81 percentage points or 19.87% relative to baseline.
- Mean total sleep time rose from 340.18 to 358.98 minutes, an 18.80-minute or 5.53% within-group increase.
These group-CBT-I means are not population estimates or control-adjusted effects. Meta-analysis of group CBT-I for insomnia
Remission, Response and Sleep Quality Statistics
The AHRQ evidence table reports an individual-CBT comparison with passive control. At study-defined follow-up, remission was 61% (58 of 95) with individual CBT and 18% (15 of 84) with passive control, for a pooled remission risk ratio of 2.95 (95% CI, 1.78–4.87) and an absolute difference of 43 percentage points. AHRQ evidence table
Delivery comparisons were less decisive than the CBT-I-versus-control results:
- In-person one-on-one delivery had a 17% higher remission rate than self-help, but the 95% confidence interval ranged from 14% lower to 49% higher; this came from one direct-comparison study.
- In-person one-on-one delivery had a 10% higher remission rate than video delivery, with a 95% confidence interval from 5% lower to 26% higher in one direct comparison.
- In-person one-on-one delivery had a 33% higher responder rate than Internet delivery, with a 95% confidence interval from 8% lower to 57% higher in one study meeting the responder definition.
These intervals cross no difference, so the estimates do not establish superiority of one delivery method. AASM systematic review
Digital and Group Sleep Therapy Results
Digital CBT-I improved several self-reported sleep parameters versus inactive control in a recent meta-analysis of adults with insomnia. The pooled estimates drew on roughly nine to 12 articles per outcome, and inactive controls varied.
| Digital CBT-I outcome | Pooled result versus inactive control | Period and population |
|---|---|---|
| Total sleep time | 0.20 hours higher | Post-treatment; adults with insomnia |
| Sleep-onset latency | 15.53 minutes lower (95% CI, 12.58–18.47) | Post-treatment; adults with insomnia |
| Sleep efficiency | 7.91 percentage points higher (95% CI, 6.08–9.75) | Post-treatment; adults with insomnia |
| Wake after sleep onset | 15.61 minutes lower (95% CI, 11.05–20.16) | Post-treatment; adults with insomnia |
| Nighttime awakenings | 0.53 fewer (95% CI, 0.38–0.69) | Post-treatment; adults with insomnia |
Source: Digital CBT-I systematic review and meta-analysis. These are pooled self-reported sleep-parameter estimates.
One randomized digital CBT-I trial reported 48% remission after a 7-week course versus 18% in a waitlist control. In the same trial, 21% of digital-CBT-I participants achieved an ISI reduction greater than eight points versus 0% of waitlist participants; the treatment group’s mean ISI score fell from 12.97 at baseline to 8.18 after treatment and 7.27 at three-month follow-up. AASM systematic review
The trial used ISI below 8 for remission, and ISI is a 0–28 symptom-severity scale. Follow-up attrition and the single-trial design limit generalization.
CPAP Sleep Apnea Therapy Adherence Statistics
CPAP means continuous positive airway pressure, and adherence thresholds are study-defined. The following OSA figures concern CPAP-naive patients or people referred for treatment, not all people with sleep apnea.
| CPAP measure | Intervention or group result | Period and population |
|---|---|---|
| Average use | 4.5 hours/night versus 3.7 hours/night in active control | Six months; CPAP-naive patients with OSA |
| Nights above four hours | 62.0% versus 51.4% | Six months; CPAP-naive patients with OSA |
| Trial mean advantage | 0.8 hours/night | Six months; peer-supported intervention |
| Nights-above-four-hours advantage | 10.6 percentage points | Six months; peer-supported intervention |
Source: Peer-driven CPAP adherence randomized trial. The study tested a specific interactive voice-response peer intervention.
A separate randomized trial enrolled 206 people referred for CPAP: 97 received supportive information and 109 received social cognitive therapy. CPAP uptake was 82% and 88%, respectively, after intervention, with no statistically significant difference (P=0.35). CPAP social cognitive therapy randomized trial
- At one week, adherence ranged from 63% to 66% across the two randomized groups, using the trial’s four-hour threshold.
- At six months, adherence was 55% in one group and 47% in the other, with no statistically significant difference (P=0.36).
- Each one-unit increase in pretreatment self-efficacy was associated with a 1.8-fold increase in the odds of six-month CPAP adherence (95% CI, 1.1–3.0), a predictive association from one trial analysis rather than proof of causation.
Sleep Therapy Durability and Delivery Limits
Follow-up results from group CBT-I came from five studies, fewer than the six contributing studies for the main post-treatment means. They show improvement at follow-up, but the follow-up timing was not uniform in the supplied evidence.
| Group CBT-I measure | Follow-up baseline | Follow-up result |
|---|---|---|
| Sleep-onset latency | 49.66 minutes | 29.98 minutes |
| Sleep efficiency | 68.77% | 79.96% |
| Wake after sleep onset | 86.79 minutes | 53.78 minutes |
| Total sleep time | 331.55 minutes | 374.46 minutes |
Source: Meta-analysis of group CBT-I for insomnia. The follow-up total-sleep-time increase was 42.91 minutes or 12.94%, while sleep-onset latency improved by 19.68 minutes or 39.63% and wake after sleep onset improved by 33.01 minutes or 38.03%.
The overall evidence has practical limits. Remission, response and adherence are not interchangeable outcomes; meta-analyses combine heterogeneous interventions, controls, instruments and follow-up periods; and several sleep outcomes are self-reported sleep-diary or questionnaire measures rather than polysomnography measurements.