| | Trials | | WMD (95% CI) | value |
| | LWDHW plus sustained-release nifedipine versus sustained release nifedipine | 1 | −7.00 (−8.74, −5.26) | <0.00001 | | LWDHW plus nifedipine controlled release tablet versus nifedipine controlled release tablet | 1 | −2.25 (−11.90, 7.40) | 0.65 | | LWDHW plus captopril versus captopril | 1 | −6.75 (−11.26, −2.24) | 0.003 | | LWDHW plus nifedipine controlled release tablet nifedipine controlled release tablet | 1 | −4.00 (−7.23, −0.77) | 0.02 | | LWDHW plus nifedipine versus nifedipine | 1 | −6.00 (−14.46, 2.46) | 0.16 |
| | Meta-analysis | 5 | −6.27 (−7.69, −4.86) | <0.00001 |
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