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Table 3 Statistical analysis of the mean difference of stockroom manager’s time between CO and ST for all categories (paired t test)

From: Comparing time and motion methods to study personnel time in the context of a family planning supply chain intervention in Senegal

Stockroom managers’ relative time Mean (μ) Mean difference (MD)
[95% CI] CO − x̄ST [95% CI]
All categories CO ST ST − CO
FP productive stockroom activities 4.1% 9.8% 5.7% [3.6–7.8%]*
[2.1–6.1%] [7.3–12.3%]
Other productive stockroom activities 47.0% 65.7% 18.7% [11.9–25.5%]*
[38.9–55.1%] [60.1–71.3%]
Productive other 9.5% 15.1% 5.6% [0.4–10.9%]‡
[6.5–12.4%] [9.7–20.5%]
Waiting time 36.3% 5.3% − 31.0% [− 38.4 to − 23.5%]*
[27.7–44.8%] [1.5–9.1%]
Non-productive 3.2% 4.1% − 1.0% [− 1.9 to 3.8%]‡
[0.6–5.7%] [2.5–5.7%]
  1. *p < 0.001
  2. p > 0.05