Table 6.

Agreement between reported use of skin care products in 2003 and 2011. The NOWAC study, 2003–2011, Tromsø, Norway

	Number	PA (%)c	PA±1 (%)d	κw (95% CI)e
Body lotiona	8485	44.4	75.0	0.52 (0.51–0.53)
Hand creama	8408	40.6	70.9	0.51 (0.50–0.51)
Facial creama	8740	66.6	90.3	0.59 (0.58–0.61)
User statusb	8484	59.9	91.5	0.52 (0.51–0.53)

^aNever/seldom, 1–3 times per month, once a week, 2–4 times per week, 5–6 times per week, 1 time/day and 2 or more times/day

^bNone, light, moderate, frequent, heavy

^cPercentage of agreement on the diagonal

^dPercentage of agreement on the diagonal ± 1 category

^eWeighted kappa with 95% confidence interval (CI)