With regard to actual participation, material from the recent Danish survey (Danish ile 1 f a r e Sur ν e y, 1976) indicates that participation in oc­cupational courses ("during the past ¿rear") is particularly low among permanent afternoon and night shift workers (lo per cent, compared with 2o per cent among the total working population).
("i løbet af det foregående år") er specielt lav blandt arbejdere i varige eftermiddags- eller natskift (10 procent, sammenlignet med 20 procent for hele den arbejdende befolkning).