少なくとも、今回検討の短期的ヨガ介入においては、選択バイアスの問題とともに、心理的影響があるようだ。その内容はやや複雑で、自宅ヨガにおける最大肯定群の存在が心理的ポジティブ効果をかさ上げしている。一方、中間的肯定的評価群では、ヨガ教室介入の方がやや多い。
なんにしろ、導入期に教室に通うのは良いが、降圧効果を目的にするなら自宅ヨガが基本と考えるべきなのかもしれない。現時点での考察をしろと言われれば・・・
高血圧診断一次医療機関患者でのヨガ介入の血圧・QOL研究２つでその効果を研究。
スイス南部地域の一次医療機関電子カルテ調査高血圧診断：２０−８０歳、総数８３名、ベースライン血圧 １２０〜１７９/１０９ mmHg以下
ベースラインで、標準化血圧測定と自己報告QOL(WHOQOL-BREF)調査
介入：
１）ヨガ教室：ヨガインストラクター（n=28)
２）自宅ヨガ(n=28)
３）対照群(n=27)
介入１２週後、評価
Impact of yoga on blood pressure and quality of life in patients with hypertension – a controlled trial in primary care, matched for systolic blood pressure
Moa Wolff, et. al.
BMC Cardiovascular Disorders 2013, 13:111
doi:10.1186/1471-2261-13-111
ヨガ教室介入では、血圧改善せず、自己評価QOLも改善せず
自宅ヨガ群では、拡張期血圧4.4mmHg低下(p<0 .05="" font="">
さらに、自己報告QOL改善
介入後血圧と血圧補正値
| BP after intervention and adjusted mean change in BP | ||||||
| Intervention group 1 | Intervention group 2 | Group 3 | ||||
| Yoga class group | Yoga at home group | Control group | ||||
| OC | PPS | OC | PPS | OC | PPS | |
| n = 28 | n = 21 | n = 26 | n = 20 | n = 26 | n = 23 | |
| Mean (SE) | Mean (SE) | Mean (SE) | Mean (SE) | Mean (SE) | Mean (SE) | |
| SBP (mmHg) | 144.1 (2.6) | 144.3 (3.1) | 137.0 (2.7) | 138.4 (3.2) | 141.5 (2.7) | 142.6 (3.0) |
| Change from baseline | 0.3 (2.6) | -0.2 (3.1) | -6.8 (2.7) | -6.1 (3.2) | -2.3 (2.7) | -1.9 (3.0) |
| P-value | 0.917 | 0.954 | 0.013** | 0.061 | 0.381 | 0.527 |
| Difference vs. control | 2.6 (3.7) | 1.7 (4.3) | -4.4 (3.8) | -4.2 (4.4) | ||
| P-value | 0.482 | 0.693 | 0.241 | 0.341 | ||
| DBP (mmHg) | 89.4 (1.6) | 89.5 (1.9) | 84.7 (1.6) | 85.3 (1.9) | 89.9 (1.6) | 90.2 (1.8) |
| Change from baseline | 0.2 (1.6) | 0.3 (1.9) | -4.4 (1.6) | -3.9 (1.9) | 0.8 (1.6) | 1.01 (1.8) |
| P-value | 0.889 | 0.890 | 0.008** | 0.045** | 0.612 | 0.571 |
| Difference vs. control | -0.6 (2.5) | -0.8 (2.6) | -5.2 (2.3) | -4.9 (2.6) | ||
| P-value | 0.794 | 0.771 | 0.025* | 0.064 | ||
| Yoga sessions during intervention† | 47.2 | 52.7 | 63.9 | 72.6 | ||
*Significant difference compared to control (p < 0.05).
**Significant change from baseline (p < 0.05).
†According to yoga calendar (yoga class sessions and yoga at home sessions).
OC, observed cases; PPS, per protocol set; SE, standard error of the mean; SBP, systolic blood pressure; DBP, diastolic blood pressure.
The PPS consists of all patients who (1) practiced yoga at least once a week for nine weeks or more and (2) had no change in medication during the study period.
Wolff et al.
Wolff et al. BMC Cardiovascular Disorders 2013 13:111 doi:10.1186/1471-2261-13-111
a. How did you experience the yoga practice emotionally? b. How did you experience the yoga practice physically? c. Will you continue practicing yoga after this study?
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