Outcome measure | Winter-summer difference | Standard deviation | Reference | Desired accuracy (95% CI width) | Required sample size |
---|---|---|---|---|---|
A1C | 0.207% | 0.943% | See Table 1 | ± 0.1 | 342 |
± 0.15 | 152 | ||||
Steps/day | |||||
Men | 3,629 | Estimate: 5,000 | Chan et al [20] (data) | ± 500 | 384 |
± 1,000 | 96 | ||||
± 1,100 | 80 | ||||
Women | 1,106 | Estimate: 5,000 | Chan et al [20] (data) | ± 500 | 384 |
± 1,000 | 96 | ||||
± 1,100 | 80 |